/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-opt-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 14:28:27,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 14:28:27,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 14:28:27,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 14:28:27,521 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-03 14:28:27,541 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 14:28:27,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 14:28:27,541 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 14:28:27,541 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 14:28:27,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 14:28:27,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 14:28:27,543 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 14:28:27,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 14:28:27,543 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 14:28:27,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 14:28:27,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 14:28:27,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 14:28:27,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 14:28:27,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 14:28:27,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 14:28:27,545 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 14:28:27,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 14:28:27,545 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 14:28:27,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 14:28:27,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 14:28:27,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 14:28:27,546 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 14:28:27,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 14:28:27,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 14:28:27,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 14:28:27,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 14:28:27,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 14:28:27,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 14:28:27,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 14:28:27,547 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 14:28:27,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 14:28:27,547 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 14:28:27,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 14:28:27,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 14:28:27,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 14:28:27,895 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 14:28:27,897 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 14:28:27,898 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-opt-symm.wvr.bpl [2021-05-03 14:28:27,899 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-opt-symm.wvr.bpl' [2021-05-03 14:28:27,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 14:28:27,940 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 14:28:27,941 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 14:28:27,941 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 14:28:27,942 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 14:28:27,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:28:27" (1/1) ... [2021-05-03 14:28:27,961 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:28:27" (1/1) ... [2021-05-03 14:28:27,968 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 14:28:27,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 14:28:27,973 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 14:28:27,973 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 14:28:27,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:28:27" (1/1) ... [2021-05-03 14:28:27,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:28:27" (1/1) ... [2021-05-03 14:28:27,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:28:27" (1/1) ... [2021-05-03 14:28:27,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:28:27" (1/1) ... [2021-05-03 14:28:27,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:28:27" (1/1) ... [2021-05-03 14:28:27,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:28:27" (1/1) ... [2021-05-03 14:28:27,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:28:27" (1/1) ... [2021-05-03 14:28:27,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 14:28:27,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 14:28:27,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 14:28:27,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 14:28:27,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:28:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 14:28:28,063 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 14:28:28,064 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 14:28:28,064 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 14:28:28,064 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 14:28:28,064 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 14:28:28,064 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 14:28:28,065 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 14:28:28,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 14:28:28,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 14:28:28,066 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 14:28:28,483 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 14:28:28,483 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-03 14:28:28,485 INFO L202 PluginConnector]: Adding new model chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:28:28 BoogieIcfgContainer [2021-05-03 14:28:28,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 14:28:28,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 14:28:28,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 14:28:28,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 14:28:28,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:28:27" (1/2) ... [2021-05-03 14:28:28,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77076f93 and model type chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 02:28:28, skipping insertion in model container [2021-05-03 14:28:28,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:28:28" (2/2) ... [2021-05-03 14:28:28,492 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-opt-symm.wvr.bpl [2021-05-03 14:28:28,496 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 14:28:28,513 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 14:28:28,516 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 14:28:28,517 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 14:28:28,546 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-03 14:28:28,561 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-03 14:28:28,579 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 14:28:28,579 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 14:28:28,579 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 14:28:28,579 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 14:28:28,579 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 14:28:28,579 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 14:28:28,579 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 14:28:28,580 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 14:28:28,587 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2021-05-03 14:28:28,597 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:28,599 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:28,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 14:28:28,604 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:28,605 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:28,605 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:28,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:28,610 INFO L82 PathProgramCache]: Analyzing trace with hash -715556201, now seen corresponding path program 1 times [2021-05-03 14:28:28,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:28,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228847591] [2021-05-03 14:28:28,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:28,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:28,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228847591] [2021-05-03 14:28:28,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:28:28,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:28:28,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968207192] [2021-05-03 14:28:28,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:28:28,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:28,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:28:28,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:28:28,838 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:28,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:28,912 INFO L93 Difference]: Finished difference Result 46 states and 83 transitions. [2021-05-03 14:28:28,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:28:28,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-03 14:28:28,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:28,924 INFO L225 Difference]: With dead ends: 46 [2021-05-03 14:28:28,924 INFO L226 Difference]: Without dead ends: 44 [2021-05-03 14:28:28,926 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:28:28,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-03 14:28:28,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2021-05-03 14:28:28,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:28,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-05-03 14:28:28,966 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-05-03 14:28:28,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:28,966 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-05-03 14:28:28,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:28,967 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-05-03 14:28:28,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 14:28:28,968 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:28,968 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:28,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 14:28:28,969 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:28,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:28,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1713984121, now seen corresponding path program 2 times [2021-05-03 14:28:28,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:28,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070884821] [2021-05-03 14:28:28,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:29,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070884821] [2021-05-03 14:28:29,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:28:29,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:28:29,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960691641] [2021-05-03 14:28:29,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:28:29,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:29,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:28:29,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:28:29,048 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:29,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:29,072 INFO L93 Difference]: Finished difference Result 48 states and 89 transitions. [2021-05-03 14:28:29,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:28:29,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-03 14:28:29,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:29,074 INFO L225 Difference]: With dead ends: 48 [2021-05-03 14:28:29,074 INFO L226 Difference]: Without dead ends: 48 [2021-05-03 14:28:29,075 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:28:29,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-03 14:28:29,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2021-05-03 14:28:29,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:29,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-05-03 14:28:29,087 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-05-03 14:28:29,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:29,087 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-05-03 14:28:29,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:29,087 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-05-03 14:28:29,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 14:28:29,088 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:29,088 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:29,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 14:28:29,089 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:29,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:29,089 INFO L82 PathProgramCache]: Analyzing trace with hash -434812415, now seen corresponding path program 3 times [2021-05-03 14:28:29,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:29,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112061519] [2021-05-03 14:28:29,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:29,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112061519] [2021-05-03 14:28:29,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:28:29,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:28:29,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38362873] [2021-05-03 14:28:29,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:28:29,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:29,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:28:29,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:28:29,119 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:29,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:29,138 INFO L93 Difference]: Finished difference Result 37 states and 70 transitions. [2021-05-03 14:28:29,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:28:29,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-03 14:28:29,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:29,140 INFO L225 Difference]: With dead ends: 37 [2021-05-03 14:28:29,140 INFO L226 Difference]: Without dead ends: 37 [2021-05-03 14:28:29,140 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:28:29,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-03 14:28:29,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-05-03 14:28:29,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:29,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-05-03 14:28:29,154 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-05-03 14:28:29,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:29,155 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-05-03 14:28:29,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:29,159 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-05-03 14:28:29,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:28:29,159 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:29,159 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:29,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 14:28:29,160 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:29,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:29,160 INFO L82 PathProgramCache]: Analyzing trace with hash -341754080, now seen corresponding path program 1 times [2021-05-03 14:28:29,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:29,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3518900] [2021-05-03 14:28:29,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:28:29,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3518900] [2021-05-03 14:28:29,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:28:29,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:28:29,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294221455] [2021-05-03 14:28:29,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:28:29,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:29,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:28:29,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:28:29,245 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:29,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:29,271 INFO L93 Difference]: Finished difference Result 37 states and 70 transitions. [2021-05-03 14:28:29,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:28:29,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-03 14:28:29,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:29,274 INFO L225 Difference]: With dead ends: 37 [2021-05-03 14:28:29,274 INFO L226 Difference]: Without dead ends: 37 [2021-05-03 14:28:29,275 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:28:29,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-03 14:28:29,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-03 14:28:29,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:29,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 70 transitions. [2021-05-03 14:28:29,281 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 70 transitions. Word has length 13 [2021-05-03 14:28:29,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:29,281 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 70 transitions. [2021-05-03 14:28:29,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:29,281 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 70 transitions. [2021-05-03 14:28:29,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:28:29,282 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:29,282 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:29,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 14:28:29,282 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:29,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:29,283 INFO L82 PathProgramCache]: Analyzing trace with hash 434832868, now seen corresponding path program 2 times [2021-05-03 14:28:29,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:29,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023952801] [2021-05-03 14:28:29,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:28:29,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023952801] [2021-05-03 14:28:29,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:28:29,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:28:29,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791738917] [2021-05-03 14:28:29,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:28:29,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:29,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:28:29,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:28:29,377 INFO L87 Difference]: Start difference. First operand 37 states and 70 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:29,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:29,401 INFO L93 Difference]: Finished difference Result 63 states and 115 transitions. [2021-05-03 14:28:29,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:28:29,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-03 14:28:29,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:29,404 INFO L225 Difference]: With dead ends: 63 [2021-05-03 14:28:29,405 INFO L226 Difference]: Without dead ends: 63 [2021-05-03 14:28:29,406 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:28:29,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-03 14:28:29,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2021-05-03 14:28:29,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:29,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 76 transitions. [2021-05-03 14:28:29,412 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 76 transitions. Word has length 13 [2021-05-03 14:28:29,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:29,412 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 76 transitions. [2021-05-03 14:28:29,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:29,412 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 76 transitions. [2021-05-03 14:28:29,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:28:29,413 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:29,413 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:29,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 14:28:29,413 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:29,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:29,414 INFO L82 PathProgramCache]: Analyzing trace with hash 373288736, now seen corresponding path program 3 times [2021-05-03 14:28:29,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:29,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556830766] [2021-05-03 14:28:29,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:29,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:28:29,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556830766] [2021-05-03 14:28:29,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:28:29,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:28:29,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211648417] [2021-05-03 14:28:29,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:28:29,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:29,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:28:29,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:28:29,469 INFO L87 Difference]: Start difference. First operand 39 states and 76 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:29,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:29,505 INFO L93 Difference]: Finished difference Result 44 states and 81 transitions. [2021-05-03 14:28:29,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:28:29,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-03 14:28:29,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:29,507 INFO L225 Difference]: With dead ends: 44 [2021-05-03 14:28:29,507 INFO L226 Difference]: Without dead ends: 39 [2021-05-03 14:28:29,507 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:28:29,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-03 14:28:29,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-03 14:28:29,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:29,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-05-03 14:28:29,518 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-05-03 14:28:29,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:29,518 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-05-03 14:28:29,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:29,519 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-05-03 14:28:29,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:28:29,520 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:29,520 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:29,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-03 14:28:29,520 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:29,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:29,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1182521280, now seen corresponding path program 1 times [2021-05-03 14:28:29,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:29,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360027478] [2021-05-03 14:28:29,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:29,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360027478] [2021-05-03 14:28:29,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308532593] [2021-05-03 14:28:29,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:29,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:28:29,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:30,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:30,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:30,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:28:30,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411832839] [2021-05-03 14:28:30,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:28:30,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:30,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:28:30,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:28:30,429 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:30,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:30,691 INFO L93 Difference]: Finished difference Result 71 states and 127 transitions. [2021-05-03 14:28:30,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:28:30,693 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:28:30,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:30,694 INFO L225 Difference]: With dead ends: 71 [2021-05-03 14:28:30,694 INFO L226 Difference]: Without dead ends: 58 [2021-05-03 14:28:30,694 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 550.3ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:28:30,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-03 14:28:30,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2021-05-03 14:28:30,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:30,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2021-05-03 14:28:30,703 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 14 [2021-05-03 14:28:30,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:30,703 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2021-05-03 14:28:30,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:30,704 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2021-05-03 14:28:30,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:28:30,708 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:30,708 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:30,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-03 14:28:30,929 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:30,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:30,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1118784670, now seen corresponding path program 2 times [2021-05-03 14:28:30,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:30,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173890077] [2021-05-03 14:28:30,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:31,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173890077] [2021-05-03 14:28:31,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339014488] [2021-05-03 14:28:31,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:31,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:28:31,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:28:31,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:28:31,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:31,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:31,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 14:28:31,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361460050] [2021-05-03 14:28:31,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:28:31,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:31,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:28:31,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:28:31,657 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:31,970 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2021-05-03 14:28:32,346 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2021-05-03 14:28:32,713 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-05-03 14:28:32,854 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-05-03 14:28:33,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:33,107 INFO L93 Difference]: Finished difference Result 116 states and 221 transitions. [2021-05-03 14:28:33,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:28:33,107 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:28:33,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:33,108 INFO L225 Difference]: With dead ends: 116 [2021-05-03 14:28:33,108 INFO L226 Difference]: Without dead ends: 102 [2021-05-03 14:28:33,109 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1599.4ms TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:28:33,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-03 14:28:33,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 45. [2021-05-03 14:28:33,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:33,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 88 transitions. [2021-05-03 14:28:33,112 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 88 transitions. Word has length 14 [2021-05-03 14:28:33,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:33,113 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 88 transitions. [2021-05-03 14:28:33,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:33,113 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 88 transitions. [2021-05-03 14:28:33,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:28:33,113 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:33,113 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:33,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-03 14:28:33,325 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:33,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:33,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1841591296, now seen corresponding path program 3 times [2021-05-03 14:28:33,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:33,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278407973] [2021-05-03 14:28:33,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:33,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:33,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278407973] [2021-05-03 14:28:33,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868146228] [2021-05-03 14:28:33,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:33,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:28:33,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:28:33,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:28:33,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:33,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:33,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:33,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 14:28:33,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810754087] [2021-05-03 14:28:33,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:28:33,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:33,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:28:33,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:28:33,935 INFO L87 Difference]: Start difference. First operand 45 states and 88 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:34,181 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-05-03 14:28:34,387 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-03 14:28:34,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:34,738 INFO L93 Difference]: Finished difference Result 100 states and 180 transitions. [2021-05-03 14:28:34,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:28:34,739 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:28:34,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:34,740 INFO L225 Difference]: With dead ends: 100 [2021-05-03 14:28:34,740 INFO L226 Difference]: Without dead ends: 74 [2021-05-03 14:28:34,740 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1001.4ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:28:34,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-03 14:28:34,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 47. [2021-05-03 14:28:34,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:34,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 94 transitions. [2021-05-03 14:28:34,743 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 94 transitions. Word has length 14 [2021-05-03 14:28:34,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:34,744 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 94 transitions. [2021-05-03 14:28:34,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:34,744 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 94 transitions. [2021-05-03 14:28:34,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:28:34,745 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:34,746 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:34,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-03 14:28:34,958 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:34,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:34,959 INFO L82 PathProgramCache]: Analyzing trace with hash 531039348, now seen corresponding path program 4 times [2021-05-03 14:28:34,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:34,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627854347] [2021-05-03 14:28:34,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:35,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627854347] [2021-05-03 14:28:35,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564395709] [2021-05-03 14:28:35,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:35,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:28:35,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:28:35,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:28:35,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:35,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:35,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:35,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 14:28:35,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308178559] [2021-05-03 14:28:35,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:28:35,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:35,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:28:35,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:28:35,522 INFO L87 Difference]: Start difference. First operand 47 states and 94 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:35,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:35,964 INFO L93 Difference]: Finished difference Result 71 states and 139 transitions. [2021-05-03 14:28:35,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:28:35,965 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:28:35,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:35,966 INFO L225 Difference]: With dead ends: 71 [2021-05-03 14:28:35,966 INFO L226 Difference]: Without dead ends: 60 [2021-05-03 14:28:35,966 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 671.2ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:28:35,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-03 14:28:35,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2021-05-03 14:28:35,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 48 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 98 transitions. [2021-05-03 14:28:35,969 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 98 transitions. Word has length 14 [2021-05-03 14:28:35,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:35,969 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 98 transitions. [2021-05-03 14:28:35,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:35,970 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 98 transitions. [2021-05-03 14:28:35,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:28:35,970 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:35,970 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:36,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-03 14:28:36,191 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:36,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:36,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1865630678, now seen corresponding path program 5 times [2021-05-03 14:28:36,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:36,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440212538] [2021-05-03 14:28:36,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:36,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440212538] [2021-05-03 14:28:36,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470512009] [2021-05-03 14:28:36,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:36,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:28:36,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:28:36,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:28:36,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:36,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:36,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:36,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 14:28:36,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669632696] [2021-05-03 14:28:36,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:28:36,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:36,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:28:36,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:28:36,736 INFO L87 Difference]: Start difference. First operand 49 states and 98 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:37,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:37,085 INFO L93 Difference]: Finished difference Result 100 states and 180 transitions. [2021-05-03 14:28:37,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:28:37,085 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:28:37,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:37,086 INFO L225 Difference]: With dead ends: 100 [2021-05-03 14:28:37,086 INFO L226 Difference]: Without dead ends: 74 [2021-05-03 14:28:37,086 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 514.6ms TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:28:37,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-03 14:28:37,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 50. [2021-05-03 14:28:37,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:37,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 101 transitions. [2021-05-03 14:28:37,089 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 101 transitions. Word has length 14 [2021-05-03 14:28:37,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:37,090 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 101 transitions. [2021-05-03 14:28:37,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:37,090 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 101 transitions. [2021-05-03 14:28:37,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:28:37,090 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:37,090 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:37,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-03 14:28:37,309 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:37,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:37,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1327775100, now seen corresponding path program 6 times [2021-05-03 14:28:37,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:37,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973650564] [2021-05-03 14:28:37,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:37,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:37,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:37,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973650564] [2021-05-03 14:28:37,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8741042] [2021-05-03 14:28:37,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:37,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:28:37,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:28:37,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:28:37,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:37,694 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-05-03 14:28:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:37,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:37,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 14:28:37,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803382562] [2021-05-03 14:28:37,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:28:37,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:37,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:28:37,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:28:37,854 INFO L87 Difference]: Start difference. First operand 50 states and 101 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:38,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:38,549 INFO L93 Difference]: Finished difference Result 121 states and 225 transitions. [2021-05-03 14:28:38,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:28:38,549 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:28:38,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:38,550 INFO L225 Difference]: With dead ends: 121 [2021-05-03 14:28:38,550 INFO L226 Difference]: Without dead ends: 97 [2021-05-03 14:28:38,551 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 884.8ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:28:38,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-03 14:28:38,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 53. [2021-05-03 14:28:38,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 52 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:38,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 111 transitions. [2021-05-03 14:28:38,554 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 111 transitions. Word has length 14 [2021-05-03 14:28:38,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:38,554 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 111 transitions. [2021-05-03 14:28:38,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:38,554 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 111 transitions. [2021-05-03 14:28:38,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:28:38,555 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:38,555 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:38,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:38,778 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:38,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:38,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1804086546, now seen corresponding path program 7 times [2021-05-03 14:28:38,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:38,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680755324] [2021-05-03 14:28:38,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:38,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:38,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680755324] [2021-05-03 14:28:38,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618957110] [2021-05-03 14:28:38,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:38,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:28:38,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:39,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:39,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 14:28:39,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410374816] [2021-05-03 14:28:39,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:28:39,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:39,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:28:39,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:28:39,219 INFO L87 Difference]: Start difference. First operand 53 states and 111 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:39,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:39,600 INFO L93 Difference]: Finished difference Result 83 states and 155 transitions. [2021-05-03 14:28:39,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:28:39,601 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:28:39,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:39,602 INFO L225 Difference]: With dead ends: 83 [2021-05-03 14:28:39,602 INFO L226 Difference]: Without dead ends: 70 [2021-05-03 14:28:39,602 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 533.9ms TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:28:39,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-03 14:28:39,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 53. [2021-05-03 14:28:39,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 52 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:39,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 110 transitions. [2021-05-03 14:28:39,605 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 110 transitions. Word has length 14 [2021-05-03 14:28:39,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:39,605 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 110 transitions. [2021-05-03 14:28:39,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:39,605 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 110 transitions. [2021-05-03 14:28:39,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:28:39,606 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:39,606 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:39,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-03 14:28:39,813 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:39,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:39,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1416837628, now seen corresponding path program 8 times [2021-05-03 14:28:39,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:39,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865578717] [2021-05-03 14:28:39,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:39,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:40,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:40,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865578717] [2021-05-03 14:28:40,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709953749] [2021-05-03 14:28:40,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:40,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:28:40,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:28:40,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:28:40,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:40,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:40,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 14:28:40,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258195624] [2021-05-03 14:28:40,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:28:40,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:40,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:28:40,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:28:40,389 INFO L87 Difference]: Start difference. First operand 53 states and 110 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:40,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:40,822 INFO L93 Difference]: Finished difference Result 84 states and 163 transitions. [2021-05-03 14:28:40,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:28:40,822 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:28:40,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:40,823 INFO L225 Difference]: With dead ends: 84 [2021-05-03 14:28:40,823 INFO L226 Difference]: Without dead ends: 73 [2021-05-03 14:28:40,823 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 714.1ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:28:40,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-03 14:28:40,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2021-05-03 14:28:40,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 53 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:40,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 112 transitions. [2021-05-03 14:28:40,826 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 112 transitions. Word has length 14 [2021-05-03 14:28:40,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:40,826 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 112 transitions. [2021-05-03 14:28:40,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:40,827 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 112 transitions. [2021-05-03 14:28:40,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:28:40,827 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:40,827 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:41,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-03 14:28:41,037 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:41,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:41,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1543538338, now seen corresponding path program 9 times [2021-05-03 14:28:41,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:41,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703154843] [2021-05-03 14:28:41,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:41,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703154843] [2021-05-03 14:28:41,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116374558] [2021-05-03 14:28:41,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:28:41,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:28:41,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:28:41,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:41,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:41,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:41,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:41,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 14:28:41,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520201740] [2021-05-03 14:28:41,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:28:41,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:41,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:28:41,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:28:41,485 INFO L87 Difference]: Start difference. First operand 54 states and 112 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:41,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:41,791 INFO L93 Difference]: Finished difference Result 116 states and 210 transitions. [2021-05-03 14:28:41,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:28:41,791 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:28:41,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:41,792 INFO L225 Difference]: With dead ends: 116 [2021-05-03 14:28:41,792 INFO L226 Difference]: Without dead ends: 90 [2021-05-03 14:28:41,792 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 492.1ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:28:41,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-03 14:28:41,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 53. [2021-05-03 14:28:41,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 52 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:41,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 110 transitions. [2021-05-03 14:28:41,795 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 110 transitions. Word has length 14 [2021-05-03 14:28:41,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:41,795 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 110 transitions. [2021-05-03 14:28:41,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:41,796 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 110 transitions. [2021-05-03 14:28:41,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:28:41,796 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:41,796 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:42,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:42,005 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:42,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:42,006 INFO L82 PathProgramCache]: Analyzing trace with hash -2081393916, now seen corresponding path program 10 times [2021-05-03 14:28:42,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:42,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539985049] [2021-05-03 14:28:42,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:42,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:42,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539985049] [2021-05-03 14:28:42,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323040703] [2021-05-03 14:28:42,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:42,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:28:42,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:28:42,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:28:42,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:42,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:42,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 14:28:42,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008497248] [2021-05-03 14:28:42,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:28:42,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:42,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:28:42,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:28:42,375 INFO L87 Difference]: Start difference. First operand 53 states and 110 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:43,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:43,006 INFO L93 Difference]: Finished difference Result 107 states and 200 transitions. [2021-05-03 14:28:43,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:28:43,006 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:28:43,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:43,007 INFO L225 Difference]: With dead ends: 107 [2021-05-03 14:28:43,007 INFO L226 Difference]: Without dead ends: 81 [2021-05-03 14:28:43,008 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 726.7ms TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:28:43,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-03 14:28:43,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2021-05-03 14:28:43,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 58 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:43,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 124 transitions. [2021-05-03 14:28:43,011 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 124 transitions. Word has length 14 [2021-05-03 14:28:43,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:43,011 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 124 transitions. [2021-05-03 14:28:43,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:43,011 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 124 transitions. [2021-05-03 14:28:43,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:28:43,012 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:43,012 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:43,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:43,233 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:43,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:43,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1119481792, now seen corresponding path program 11 times [2021-05-03 14:28:43,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:43,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906314895] [2021-05-03 14:28:43,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:43,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:43,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906314895] [2021-05-03 14:28:43,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257794641] [2021-05-03 14:28:43,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:43,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:28:43,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:28:43,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:28:43,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:43,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:43,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:43,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 14:28:43,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743898169] [2021-05-03 14:28:43,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:28:43,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:43,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:28:43,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:28:43,622 INFO L87 Difference]: Start difference. First operand 59 states and 124 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:44,607 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-05-03 14:28:44,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:44,715 INFO L93 Difference]: Finished difference Result 138 states and 260 transitions. [2021-05-03 14:28:44,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:28:44,715 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:28:44,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:44,716 INFO L225 Difference]: With dead ends: 138 [2021-05-03 14:28:44,716 INFO L226 Difference]: Without dead ends: 109 [2021-05-03 14:28:44,716 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1169.1ms TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:28:44,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-03 14:28:44,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 68. [2021-05-03 14:28:44,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.1343283582089554) internal successors, (143), 67 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:44,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 143 transitions. [2021-05-03 14:28:44,720 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 143 transitions. Word has length 14 [2021-05-03 14:28:44,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:44,720 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 143 transitions. [2021-05-03 14:28:44,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:44,720 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 143 transitions. [2021-05-03 14:28:44,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:28:44,721 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:44,721 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:44,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:44,929 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:44,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:44,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1559031433, now seen corresponding path program 12 times [2021-05-03 14:28:44,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:44,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787922787] [2021-05-03 14:28:44,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:44,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787922787] [2021-05-03 14:28:44,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673086216] [2021-05-03 14:28:44,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:45,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:28:45,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:28:45,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:28:45,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:45,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:45,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:28:45,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564411592] [2021-05-03 14:28:45,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:28:45,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:45,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:28:45,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:28:45,119 INFO L87 Difference]: Start difference. First operand 68 states and 143 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:45,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:45,171 INFO L93 Difference]: Finished difference Result 104 states and 207 transitions. [2021-05-03 14:28:45,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:28:45,180 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:28:45,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:45,180 INFO L225 Difference]: With dead ends: 104 [2021-05-03 14:28:45,181 INFO L226 Difference]: Without dead ends: 104 [2021-05-03 14:28:45,181 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:28:45,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-03 14:28:45,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 68. [2021-05-03 14:28:45,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.1343283582089554) internal successors, (143), 67 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:45,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 143 transitions. [2021-05-03 14:28:45,184 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 143 transitions. Word has length 15 [2021-05-03 14:28:45,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:45,184 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 143 transitions. [2021-05-03 14:28:45,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:45,184 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 143 transitions. [2021-05-03 14:28:45,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:28:45,185 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:45,185 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:45,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:45,401 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:45,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:45,401 INFO L82 PathProgramCache]: Analyzing trace with hash 312216095, now seen corresponding path program 13 times [2021-05-03 14:28:45,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:45,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002922982] [2021-05-03 14:28:45,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:45,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:45,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002922982] [2021-05-03 14:28:45,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381640947] [2021-05-03 14:28:45,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:28:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:45,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:28:45,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:45,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:45,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:28:45,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602960068] [2021-05-03 14:28:45,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:28:45,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:45,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:28:45,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:28:45,632 INFO L87 Difference]: Start difference. First operand 68 states and 143 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:45,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:45,909 INFO L93 Difference]: Finished difference Result 111 states and 221 transitions. [2021-05-03 14:28:45,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:28:45,909 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:28:45,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:45,912 INFO L225 Difference]: With dead ends: 111 [2021-05-03 14:28:45,912 INFO L226 Difference]: Without dead ends: 111 [2021-05-03 14:28:45,912 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 300.3ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:28:45,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-03 14:28:45,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 67. [2021-05-03 14:28:45,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.121212121212121) internal successors, (140), 66 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:45,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 140 transitions. [2021-05-03 14:28:45,916 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 140 transitions. Word has length 15 [2021-05-03 14:28:45,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:45,916 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 140 transitions. [2021-05-03 14:28:45,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:45,917 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 140 transitions. [2021-05-03 14:28:45,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:28:45,917 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:45,917 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:46,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-05-03 14:28:46,133 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:46,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:46,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1144507010, now seen corresponding path program 14 times [2021-05-03 14:28:46,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:46,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84750619] [2021-05-03 14:28:46,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:46,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84750619] [2021-05-03 14:28:46,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333177511] [2021-05-03 14:28:46,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:46,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:28:46,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:28:46,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:28:46,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:46,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:46,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:46,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:28:46,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967142168] [2021-05-03 14:28:46,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:28:46,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:46,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:28:46,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:28:46,405 INFO L87 Difference]: Start difference. First operand 67 states and 140 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:46,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:46,927 INFO L93 Difference]: Finished difference Result 121 states and 226 transitions. [2021-05-03 14:28:46,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:28:46,928 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:28:46,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:46,928 INFO L225 Difference]: With dead ends: 121 [2021-05-03 14:28:46,929 INFO L226 Difference]: Without dead ends: 117 [2021-05-03 14:28:46,929 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 595.4ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:28:46,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-03 14:28:46,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 73. [2021-05-03 14:28:46,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.125) internal successors, (153), 72 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:46,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 153 transitions. [2021-05-03 14:28:46,932 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 153 transitions. Word has length 15 [2021-05-03 14:28:46,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:46,932 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 153 transitions. [2021-05-03 14:28:46,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:46,933 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 153 transitions. [2021-05-03 14:28:46,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:28:46,933 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:46,933 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:47,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:47,149 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:47,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:47,149 INFO L82 PathProgramCache]: Analyzing trace with hash 901756610, now seen corresponding path program 15 times [2021-05-03 14:28:47,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:47,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265155676] [2021-05-03 14:28:47,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:47,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265155676] [2021-05-03 14:28:47,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540748761] [2021-05-03 14:28:47,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:47,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:28:47,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:28:47,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:28:47,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:47,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:47,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:47,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:28:47,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011630401] [2021-05-03 14:28:47,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:28:47,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:47,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:28:47,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:28:47,398 INFO L87 Difference]: Start difference. First operand 73 states and 153 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:47,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:47,572 INFO L93 Difference]: Finished difference Result 95 states and 189 transitions. [2021-05-03 14:28:47,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:28:47,573 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:28:47,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:47,573 INFO L225 Difference]: With dead ends: 95 [2021-05-03 14:28:47,573 INFO L226 Difference]: Without dead ends: 95 [2021-05-03 14:28:47,574 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:28:47,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-03 14:28:47,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2021-05-03 14:28:47,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 67 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:47,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 141 transitions. [2021-05-03 14:28:47,577 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 141 transitions. Word has length 15 [2021-05-03 14:28:47,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:47,577 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 141 transitions. [2021-05-03 14:28:47,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:47,577 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 141 transitions. [2021-05-03 14:28:47,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:28:47,577 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:47,577 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:47,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:47,785 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:47,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:47,785 INFO L82 PathProgramCache]: Analyzing trace with hash -138479188, now seen corresponding path program 16 times [2021-05-03 14:28:47,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:47,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303879406] [2021-05-03 14:28:47,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:47,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303879406] [2021-05-03 14:28:47,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632350130] [2021-05-03 14:28:47,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:47,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:28:47,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:28:47,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:28:47,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:48,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:48,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:48,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:28:48,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885029661] [2021-05-03 14:28:48,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:28:48,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:48,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:28:48,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:28:48,017 INFO L87 Difference]: Start difference. First operand 68 states and 141 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:48,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:48,058 INFO L93 Difference]: Finished difference Result 78 states and 161 transitions. [2021-05-03 14:28:48,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:28:48,058 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:28:48,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:48,059 INFO L225 Difference]: With dead ends: 78 [2021-05-03 14:28:48,059 INFO L226 Difference]: Without dead ends: 78 [2021-05-03 14:28:48,059 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:28:48,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-03 14:28:48,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2021-05-03 14:28:48,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.1029411764705883) internal successors, (143), 68 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:48,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 143 transitions. [2021-05-03 14:28:48,062 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 143 transitions. Word has length 15 [2021-05-03 14:28:48,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:48,062 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 143 transitions. [2021-05-03 14:28:48,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:48,062 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 143 transitions. [2021-05-03 14:28:48,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:28:48,062 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:48,062 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:48,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:48,273 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:48,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:48,273 INFO L82 PathProgramCache]: Analyzing trace with hash -966724252, now seen corresponding path program 17 times [2021-05-03 14:28:48,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:48,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183747122] [2021-05-03 14:28:48,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:48,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:48,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183747122] [2021-05-03 14:28:48,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834175137] [2021-05-03 14:28:48,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:48,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:28:48,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:28:48,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:28:48,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:48,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:48,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:28:48,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296847613] [2021-05-03 14:28:48,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:28:48,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:48,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:28:48,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:28:48,499 INFO L87 Difference]: Start difference. First operand 69 states and 143 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:48,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:48,604 INFO L93 Difference]: Finished difference Result 94 states and 185 transitions. [2021-05-03 14:28:48,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:28:48,605 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:28:48,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:48,605 INFO L225 Difference]: With dead ends: 94 [2021-05-03 14:28:48,605 INFO L226 Difference]: Without dead ends: 92 [2021-05-03 14:28:48,606 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:28:48,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-03 14:28:48,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 73. [2021-05-03 14:28:48,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.111111111111111) internal successors, (152), 72 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:48,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 152 transitions. [2021-05-03 14:28:48,607 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 152 transitions. Word has length 15 [2021-05-03 14:28:48,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:48,608 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 152 transitions. [2021-05-03 14:28:48,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:48,608 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 152 transitions. [2021-05-03 14:28:48,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:28:48,608 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:48,608 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:48,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-03 14:28:48,809 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:48,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:48,809 INFO L82 PathProgramCache]: Analyzing trace with hash 367867078, now seen corresponding path program 18 times [2021-05-03 14:28:48,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:48,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472249879] [2021-05-03 14:28:48,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:48,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:48,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472249879] [2021-05-03 14:28:48,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887922002] [2021-05-03 14:28:48,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:48,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:28:48,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:28:48,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:28:48,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:49,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:49,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:28:49,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87651267] [2021-05-03 14:28:49,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:28:49,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:49,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:28:49,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:28:49,019 INFO L87 Difference]: Start difference. First operand 73 states and 152 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:49,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:49,131 INFO L93 Difference]: Finished difference Result 96 states and 191 transitions. [2021-05-03 14:28:49,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:28:49,132 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:28:49,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:49,132 INFO L225 Difference]: With dead ends: 96 [2021-05-03 14:28:49,133 INFO L226 Difference]: Without dead ends: 96 [2021-05-03 14:28:49,133 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 148.5ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:28:49,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-03 14:28:49,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 73. [2021-05-03 14:28:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.111111111111111) internal successors, (152), 72 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:49,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 152 transitions. [2021-05-03 14:28:49,136 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 152 transitions. Word has length 15 [2021-05-03 14:28:49,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:49,136 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 152 transitions. [2021-05-03 14:28:49,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:49,136 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 152 transitions. [2021-05-03 14:28:49,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:28:49,136 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:49,136 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:49,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-05-03 14:28:49,357 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:49,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:49,357 INFO L82 PathProgramCache]: Analyzing trace with hash -169988500, now seen corresponding path program 19 times [2021-05-03 14:28:49,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:49,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785648525] [2021-05-03 14:28:49,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:49,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:49,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785648525] [2021-05-03 14:28:49,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691260823] [2021-05-03 14:28:49,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:49,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:28:49,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:49,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:49,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:49,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:28:49,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311407131] [2021-05-03 14:28:49,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:28:49,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:49,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:28:49,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:28:49,533 INFO L87 Difference]: Start difference. First operand 73 states and 152 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:49,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:49,689 INFO L93 Difference]: Finished difference Result 85 states and 174 transitions. [2021-05-03 14:28:49,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:28:49,689 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:28:49,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:49,689 INFO L225 Difference]: With dead ends: 85 [2021-05-03 14:28:49,690 INFO L226 Difference]: Without dead ends: 85 [2021-05-03 14:28:49,690 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 187.6ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:28:49,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-03 14:28:49,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 70. [2021-05-03 14:28:49,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:49,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 145 transitions. [2021-05-03 14:28:49,692 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 145 transitions. Word has length 15 [2021-05-03 14:28:49,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:49,692 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 145 transitions. [2021-05-03 14:28:49,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:49,692 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 145 transitions. [2021-05-03 14:28:49,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:28:49,693 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:49,693 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:49,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:49,905 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:49,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:49,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1551463716, now seen corresponding path program 20 times [2021-05-03 14:28:49,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:49,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31219612] [2021-05-03 14:28:49,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:49,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31219612] [2021-05-03 14:28:49,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311193778] [2021-05-03 14:28:49,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:49,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:28:49,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:28:49,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:28:49,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:50,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:50,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:28:50,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534029052] [2021-05-03 14:28:50,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:28:50,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:50,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:28:50,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:28:50,111 INFO L87 Difference]: Start difference. First operand 70 states and 145 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:50,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:50,160 INFO L93 Difference]: Finished difference Result 77 states and 159 transitions. [2021-05-03 14:28:50,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:28:50,160 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:28:50,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:50,161 INFO L225 Difference]: With dead ends: 77 [2021-05-03 14:28:50,161 INFO L226 Difference]: Without dead ends: 77 [2021-05-03 14:28:50,161 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:28:50,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-03 14:28:50,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2021-05-03 14:28:50,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 67 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:50,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 141 transitions. [2021-05-03 14:28:50,164 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 141 transitions. Word has length 15 [2021-05-03 14:28:50,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:50,164 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 141 transitions. [2021-05-03 14:28:50,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:50,164 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 141 transitions. [2021-05-03 14:28:50,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:28:50,164 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:50,164 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:50,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-05-03 14:28:50,381 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:50,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:50,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2057809982, now seen corresponding path program 21 times [2021-05-03 14:28:50,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:50,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422767749] [2021-05-03 14:28:50,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:50,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:50,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422767749] [2021-05-03 14:28:50,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610540848] [2021-05-03 14:28:50,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:50,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:28:50,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:28:50,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:28:50,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:50,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:50,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:28:50,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834509855] [2021-05-03 14:28:50,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:28:50,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:50,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:28:50,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:28:50,606 INFO L87 Difference]: Start difference. First operand 68 states and 141 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:50,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:50,766 INFO L93 Difference]: Finished difference Result 122 states and 230 transitions. [2021-05-03 14:28:50,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:28:50,766 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:28:50,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:50,767 INFO L225 Difference]: With dead ends: 122 [2021-05-03 14:28:50,767 INFO L226 Difference]: Without dead ends: 122 [2021-05-03 14:28:50,768 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 190.6ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:28:50,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-03 14:28:50,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 70. [2021-05-03 14:28:50,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.1449275362318843) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:50,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 148 transitions. [2021-05-03 14:28:50,770 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 148 transitions. Word has length 15 [2021-05-03 14:28:50,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:50,770 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 148 transitions. [2021-05-03 14:28:50,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:50,771 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 148 transitions. [2021-05-03 14:28:50,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:28:50,771 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:50,771 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:50,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-05-03 14:28:50,994 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:50,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:50,994 INFO L82 PathProgramCache]: Analyzing trace with hash -742071201, now seen corresponding path program 22 times [2021-05-03 14:28:50,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:50,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892286225] [2021-05-03 14:28:50,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:51,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892286225] [2021-05-03 14:28:51,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2913454] [2021-05-03 14:28:51,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:28:51,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:28:51,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:28:51,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:28:51,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:51,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:51,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:28:51,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647520856] [2021-05-03 14:28:51,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:28:51,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:51,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:28:51,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:28:51,286 INFO L87 Difference]: Start difference. First operand 70 states and 148 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:51,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:51,575 INFO L93 Difference]: Finished difference Result 96 states and 184 transitions. [2021-05-03 14:28:51,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:28:51,575 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:28:51,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:51,576 INFO L225 Difference]: With dead ends: 96 [2021-05-03 14:28:51,576 INFO L226 Difference]: Without dead ends: 90 [2021-05-03 14:28:51,576 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 388.9ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:28:51,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-03 14:28:51,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2021-05-03 14:28:51,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 75 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:51,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 157 transitions. [2021-05-03 14:28:51,579 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 157 transitions. Word has length 15 [2021-05-03 14:28:51,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:51,579 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 157 transitions. [2021-05-03 14:28:51,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:51,579 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 157 transitions. [2021-05-03 14:28:51,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:28:51,579 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:51,579 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:51,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:51,789 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:51,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:51,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1519954404, now seen corresponding path program 23 times [2021-05-03 14:28:51,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:51,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392444043] [2021-05-03 14:28:51,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:51,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392444043] [2021-05-03 14:28:51,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759073836] [2021-05-03 14:28:51,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:51,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:28:51,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:28:51,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:28:51,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:51,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:51,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:28:51,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809603753] [2021-05-03 14:28:51,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:28:51,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:51,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:28:51,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:28:51,977 INFO L87 Difference]: Start difference. First operand 76 states and 157 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:52,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:52,112 INFO L93 Difference]: Finished difference Result 89 states and 180 transitions. [2021-05-03 14:28:52,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:28:52,113 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:28:52,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:52,114 INFO L225 Difference]: With dead ends: 89 [2021-05-03 14:28:52,114 INFO L226 Difference]: Without dead ends: 89 [2021-05-03 14:28:52,114 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 181.6ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:28:52,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-03 14:28:52,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2021-05-03 14:28:52,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 73 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:52,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 150 transitions. [2021-05-03 14:28:52,116 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 150 transitions. Word has length 15 [2021-05-03 14:28:52,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:52,117 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 150 transitions. [2021-05-03 14:28:52,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:52,117 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 150 transitions. [2021-05-03 14:28:52,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:28:52,117 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:52,117 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:52,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-03 14:28:52,340 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:52,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:52,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1794258174, now seen corresponding path program 24 times [2021-05-03 14:28:52,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:52,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558484842] [2021-05-03 14:28:52,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:52,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:52,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:52,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558484842] [2021-05-03 14:28:52,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844860102] [2021-05-03 14:28:52,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:52,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:28:52,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:28:52,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:28:52,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:52,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:52,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:28:52,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157076323] [2021-05-03 14:28:52,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:28:52,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:52,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:28:52,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:28:52,548 INFO L87 Difference]: Start difference. First operand 74 states and 150 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:52,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:52,813 INFO L93 Difference]: Finished difference Result 146 states and 271 transitions. [2021-05-03 14:28:52,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:28:52,813 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:28:52,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:52,814 INFO L225 Difference]: With dead ends: 146 [2021-05-03 14:28:52,814 INFO L226 Difference]: Without dead ends: 146 [2021-05-03 14:28:52,815 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 293.0ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:28:52,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-03 14:28:52,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 76. [2021-05-03 14:28:52,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 75 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 157 transitions. [2021-05-03 14:28:52,817 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 157 transitions. Word has length 15 [2021-05-03 14:28:52,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:52,818 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 157 transitions. [2021-05-03 14:28:52,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:52,818 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 157 transitions. [2021-05-03 14:28:52,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:28:52,818 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:52,818 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:53,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-03 14:28:53,041 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:53,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:53,041 INFO L82 PathProgramCache]: Analyzing trace with hash -299172061, now seen corresponding path program 25 times [2021-05-03 14:28:53,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:53,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269061294] [2021-05-03 14:28:53,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:53,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269061294] [2021-05-03 14:28:53,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880669004] [2021-05-03 14:28:53,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:53,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:28:53,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:53,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:53,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:53,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:28:53,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331442209] [2021-05-03 14:28:53,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:28:53,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:53,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:28:53,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:28:53,318 INFO L87 Difference]: Start difference. First operand 76 states and 157 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:53,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:53,876 INFO L93 Difference]: Finished difference Result 124 states and 236 transitions. [2021-05-03 14:28:53,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:28:53,876 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:28:53,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:53,877 INFO L225 Difference]: With dead ends: 124 [2021-05-03 14:28:53,877 INFO L226 Difference]: Without dead ends: 118 [2021-05-03 14:28:53,878 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 670.1ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:28:53,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-03 14:28:53,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 76. [2021-05-03 14:28:53,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.08) internal successors, (156), 75 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:53,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 156 transitions. [2021-05-03 14:28:53,880 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 156 transitions. Word has length 15 [2021-05-03 14:28:53,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:53,881 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 156 transitions. [2021-05-03 14:28:53,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:53,881 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 156 transitions. [2021-05-03 14:28:53,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:28:53,881 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:53,881 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:54,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:54,101 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:54,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:54,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1962853544, now seen corresponding path program 26 times [2021-05-03 14:28:54,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:54,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315229681] [2021-05-03 14:28:54,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:54,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:54,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315229681] [2021-05-03 14:28:54,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57266976] [2021-05-03 14:28:54,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:54,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:28:54,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:28:54,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:28:54,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:54,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:54,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:28:54,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068554441] [2021-05-03 14:28:54,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:28:54,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:54,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:28:54,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:28:54,285 INFO L87 Difference]: Start difference. First operand 76 states and 156 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:54,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:54,520 INFO L93 Difference]: Finished difference Result 119 states and 236 transitions. [2021-05-03 14:28:54,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:28:54,520 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:28:54,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:54,521 INFO L225 Difference]: With dead ends: 119 [2021-05-03 14:28:54,521 INFO L226 Difference]: Without dead ends: 119 [2021-05-03 14:28:54,521 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 270.8ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:28:54,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-03 14:28:54,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 76. [2021-05-03 14:28:54,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.08) internal successors, (156), 75 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:54,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 156 transitions. [2021-05-03 14:28:54,525 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 156 transitions. Word has length 15 [2021-05-03 14:28:54,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:54,525 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 156 transitions. [2021-05-03 14:28:54,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:54,525 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 156 transitions. [2021-05-03 14:28:54,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:28:54,525 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:54,525 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:54,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-05-03 14:28:54,733 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:54,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:54,733 INFO L82 PathProgramCache]: Analyzing trace with hash 207174205, now seen corresponding path program 27 times [2021-05-03 14:28:54,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:54,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032995071] [2021-05-03 14:28:54,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:54,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032995071] [2021-05-03 14:28:54,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517291275] [2021-05-03 14:28:54,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:54,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:28:54,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:28:54,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:28:54,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:54,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:54,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:54,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:28:54,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759826343] [2021-05-03 14:28:54,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:28:54,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:54,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:28:54,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:28:54,988 INFO L87 Difference]: Start difference. First operand 76 states and 156 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:55,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:55,245 INFO L93 Difference]: Finished difference Result 103 states and 201 transitions. [2021-05-03 14:28:55,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:28:55,245 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:28:55,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:55,246 INFO L225 Difference]: With dead ends: 103 [2021-05-03 14:28:55,246 INFO L226 Difference]: Without dead ends: 92 [2021-05-03 14:28:55,246 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 348.8ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:28:55,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-03 14:28:55,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2021-05-03 14:28:55,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.085714285714286) internal successors, (146), 70 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:55,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 146 transitions. [2021-05-03 14:28:55,249 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 146 transitions. Word has length 15 [2021-05-03 14:28:55,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:55,249 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 146 transitions. [2021-05-03 14:28:55,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:55,249 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 146 transitions. [2021-05-03 14:28:55,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:28:55,249 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:55,250 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:55,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-05-03 14:28:55,457 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:55,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:55,457 INFO L82 PathProgramCache]: Analyzing trace with hash 868761956, now seen corresponding path program 28 times [2021-05-03 14:28:55,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:55,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535476784] [2021-05-03 14:28:55,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:55,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535476784] [2021-05-03 14:28:55,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408806934] [2021-05-03 14:28:55,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:28:55,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:28:55,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:28:55,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:28:55,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:55,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:55,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:28:55,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965039718] [2021-05-03 14:28:55,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:28:55,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:55,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:28:55,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:28:55,663 INFO L87 Difference]: Start difference. First operand 71 states and 146 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:55,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:55,787 INFO L93 Difference]: Finished difference Result 106 states and 209 transitions. [2021-05-03 14:28:55,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:28:55,788 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:28:55,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:55,788 INFO L225 Difference]: With dead ends: 106 [2021-05-03 14:28:55,788 INFO L226 Difference]: Without dead ends: 106 [2021-05-03 14:28:55,789 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 172.9ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:28:55,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-03 14:28:55,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 69. [2021-05-03 14:28:55,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:55,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 139 transitions. [2021-05-03 14:28:55,791 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 139 transitions. Word has length 15 [2021-05-03 14:28:55,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:55,791 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 139 transitions. [2021-05-03 14:28:55,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:55,792 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 139 transitions. [2021-05-03 14:28:55,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:28:55,792 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:55,792 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:56,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:56,005 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:56,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:56,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1907254775, now seen corresponding path program 29 times [2021-05-03 14:28:56,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:56,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571580649] [2021-05-03 14:28:56,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:56,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571580649] [2021-05-03 14:28:56,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212407779] [2021-05-03 14:28:56,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:56,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:28:56,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:28:56,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:28:56,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:56,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:56,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:56,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:28:56,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964252470] [2021-05-03 14:28:56,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:28:56,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:56,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:28:56,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:28:56,627 INFO L87 Difference]: Start difference. First operand 69 states and 139 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:56,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:56,965 INFO L93 Difference]: Finished difference Result 117 states and 224 transitions. [2021-05-03 14:28:56,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:28:56,977 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:28:56,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:56,978 INFO L225 Difference]: With dead ends: 117 [2021-05-03 14:28:56,978 INFO L226 Difference]: Without dead ends: 102 [2021-05-03 14:28:56,978 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 703.3ms TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:28:56,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-03 14:28:56,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 70. [2021-05-03 14:28:56,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:56,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 141 transitions. [2021-05-03 14:28:56,981 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 141 transitions. Word has length 16 [2021-05-03 14:28:56,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:56,981 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 141 transitions. [2021-05-03 14:28:56,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:56,981 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 141 transitions. [2021-05-03 14:28:56,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:28:56,982 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:56,982 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:57,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:57,189 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:57,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:57,189 INFO L82 PathProgramCache]: Analyzing trace with hash 233295193, now seen corresponding path program 30 times [2021-05-03 14:28:57,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:57,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590735558] [2021-05-03 14:28:57,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:57,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:57,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590735558] [2021-05-03 14:28:57,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973030774] [2021-05-03 14:28:57,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:57,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:28:57,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:28:57,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:28:57,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:57,679 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 14:28:57,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:57,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:57,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:28:57,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333959433] [2021-05-03 14:28:57,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:28:57,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:57,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:28:57,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:28:57,922 INFO L87 Difference]: Start difference. First operand 70 states and 141 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:58,371 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-05-03 14:28:58,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:28:58,677 INFO L93 Difference]: Finished difference Result 116 states and 223 transitions. [2021-05-03 14:28:58,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:28:58,678 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:28:58,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:28:58,678 INFO L225 Difference]: With dead ends: 116 [2021-05-03 14:28:58,678 INFO L226 Difference]: Without dead ends: 103 [2021-05-03 14:28:58,679 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1085.3ms TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:28:58,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-03 14:28:58,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 71. [2021-05-03 14:28:58,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0428571428571427) internal successors, (143), 70 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:58,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 143 transitions. [2021-05-03 14:28:58,681 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 143 transitions. Word has length 16 [2021-05-03 14:28:58,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:28:58,682 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 143 transitions. [2021-05-03 14:28:58,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:28:58,682 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 143 transitions. [2021-05-03 14:28:58,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:28:58,682 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:28:58,682 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:28:58,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:58,893 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:28:58,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:28:58,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1344046537, now seen corresponding path program 31 times [2021-05-03 14:28:58,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:28:58,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682032423] [2021-05-03 14:28:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:28:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:59,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682032423] [2021-05-03 14:28:59,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408351896] [2021-05-03 14:28:59,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:28:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:28:59,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:28:59,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:28:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:28:59,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:28:59,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:28:59,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703472016] [2021-05-03 14:28:59,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:28:59,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:28:59,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:28:59,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:28:59,598 INFO L87 Difference]: Start difference. First operand 71 states and 143 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:00,641 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2021-05-03 14:29:00,808 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 48 [2021-05-03 14:29:00,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:00,822 INFO L93 Difference]: Finished difference Result 128 states and 247 transitions. [2021-05-03 14:29:00,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:29:00,822 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:00,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:00,823 INFO L225 Difference]: With dead ends: 128 [2021-05-03 14:29:00,823 INFO L226 Difference]: Without dead ends: 110 [2021-05-03 14:29:00,823 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1522.5ms TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:29:00,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-03 14:29:00,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 72. [2021-05-03 14:29:00,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 71 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:00,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 145 transitions. [2021-05-03 14:29:00,825 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 145 transitions. Word has length 16 [2021-05-03 14:29:00,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:00,825 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 145 transitions. [2021-05-03 14:29:00,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:00,825 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 145 transitions. [2021-05-03 14:29:00,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:00,826 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:00,826 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:01,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-05-03 14:29:01,027 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:01,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:01,027 INFO L82 PathProgramCache]: Analyzing trace with hash -806940605, now seen corresponding path program 32 times [2021-05-03 14:29:01,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:01,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593814104] [2021-05-03 14:29:01,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:01,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593814104] [2021-05-03 14:29:01,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464713812] [2021-05-03 14:29:01,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:01,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:29:01,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:01,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:29:01,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:01,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:01,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:01,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:29:01,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258011269] [2021-05-03 14:29:01,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:29:01,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:01,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:29:01,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:29:01,651 INFO L87 Difference]: Start difference. First operand 72 states and 145 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:02,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:02,086 INFO L93 Difference]: Finished difference Result 89 states and 170 transitions. [2021-05-03 14:29:02,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:29:02,086 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:02,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:02,086 INFO L225 Difference]: With dead ends: 89 [2021-05-03 14:29:02,086 INFO L226 Difference]: Without dead ends: 76 [2021-05-03 14:29:02,087 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 793.2ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:29:02,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-03 14:29:02,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2021-05-03 14:29:02,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 72 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:02,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 147 transitions. [2021-05-03 14:29:02,089 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 147 transitions. Word has length 16 [2021-05-03 14:29:02,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:02,089 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 147 transitions. [2021-05-03 14:29:02,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:02,089 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 147 transitions. [2021-05-03 14:29:02,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:02,089 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:02,089 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:02,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-05-03 14:29:02,297 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:02,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:02,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1910684961, now seen corresponding path program 33 times [2021-05-03 14:29:02,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:02,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657474770] [2021-05-03 14:29:02,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:02,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657474770] [2021-05-03 14:29:02,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990762551] [2021-05-03 14:29:02,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:29:02,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:29:02,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:02,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:29:02,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:02,892 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 14:29:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:03,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:03,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:29:03,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945753931] [2021-05-03 14:29:03,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:29:03,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:03,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:29:03,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:29:03,094 INFO L87 Difference]: Start difference. First operand 73 states and 147 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:03,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:03,781 INFO L93 Difference]: Finished difference Result 112 states and 209 transitions. [2021-05-03 14:29:03,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:29:03,782 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:03,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:03,782 INFO L225 Difference]: With dead ends: 112 [2021-05-03 14:29:03,782 INFO L226 Difference]: Without dead ends: 94 [2021-05-03 14:29:03,783 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1144.3ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:29:03,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-03 14:29:03,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 77. [2021-05-03 14:29:03,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0789473684210527) internal successors, (158), 76 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:03,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 158 transitions. [2021-05-03 14:29:03,785 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 158 transitions. Word has length 16 [2021-05-03 14:29:03,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:03,785 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 158 transitions. [2021-05-03 14:29:03,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:03,785 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 158 transitions. [2021-05-03 14:29:03,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:03,785 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:03,786 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:04,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:04,005 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:04,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:04,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1049691005, now seen corresponding path program 34 times [2021-05-03 14:29:04,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:04,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035158807] [2021-05-03 14:29:04,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:04,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035158807] [2021-05-03 14:29:04,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70938419] [2021-05-03 14:29:04,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:04,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:29:04,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:04,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:29:04,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:04,410 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 14:29:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:04,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:04,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:29:04,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776405870] [2021-05-03 14:29:04,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:29:04,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:04,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:29:04,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:29:04,583 INFO L87 Difference]: Start difference. First operand 77 states and 158 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:05,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:05,173 INFO L93 Difference]: Finished difference Result 110 states and 207 transitions. [2021-05-03 14:29:05,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:29:05,173 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:05,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:05,173 INFO L225 Difference]: With dead ends: 110 [2021-05-03 14:29:05,173 INFO L226 Difference]: Without dead ends: 84 [2021-05-03 14:29:05,174 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 859.5ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:29:05,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-03 14:29:05,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2021-05-03 14:29:05,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:05,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 151 transitions. [2021-05-03 14:29:05,176 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 151 transitions. Word has length 16 [2021-05-03 14:29:05,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:05,176 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 151 transitions. [2021-05-03 14:29:05,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:05,176 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 151 transitions. [2021-05-03 14:29:05,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:05,177 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:05,177 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:05,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:05,381 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:05,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:05,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1670740832, now seen corresponding path program 35 times [2021-05-03 14:29:05,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:05,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25902791] [2021-05-03 14:29:05,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:29:05,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25902791] [2021-05-03 14:29:05,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304368309] [2021-05-03 14:29:05,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:05,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:29:05,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:05,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:29:05,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:29:05,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:05,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:29:05,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098957492] [2021-05-03 14:29:05,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:29:05,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:05,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:29:05,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:29:05,569 INFO L87 Difference]: Start difference. First operand 75 states and 151 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:05,712 INFO L93 Difference]: Finished difference Result 91 states and 182 transitions. [2021-05-03 14:29:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:29:05,713 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:05,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:05,713 INFO L225 Difference]: With dead ends: 91 [2021-05-03 14:29:05,713 INFO L226 Difference]: Without dead ends: 91 [2021-05-03 14:29:05,714 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 183.9ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:29:05,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-03 14:29:05,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 75. [2021-05-03 14:29:05,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 151 transitions. [2021-05-03 14:29:05,716 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 151 transitions. Word has length 16 [2021-05-03 14:29:05,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:05,716 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 151 transitions. [2021-05-03 14:29:05,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:05,716 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 151 transitions. [2021-05-03 14:29:05,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:05,717 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:05,717 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:05,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:05,940 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:05,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:05,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1877936069, now seen corresponding path program 36 times [2021-05-03 14:29:05,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:05,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935669106] [2021-05-03 14:29:05,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:05,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:06,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:06,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935669106] [2021-05-03 14:29:06,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210094074] [2021-05-03 14:29:06,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:06,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:29:06,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:06,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:29:06,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:06,380 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 14:29:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:06,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:06,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:29:06,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868751167] [2021-05-03 14:29:06,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:29:06,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:06,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:29:06,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:29:06,528 INFO L87 Difference]: Start difference. First operand 75 states and 151 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:07,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:07,233 INFO L93 Difference]: Finished difference Result 119 states and 225 transitions. [2021-05-03 14:29:07,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:29:07,233 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:07,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:07,233 INFO L225 Difference]: With dead ends: 119 [2021-05-03 14:29:07,234 INFO L226 Difference]: Without dead ends: 101 [2021-05-03 14:29:07,234 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 922.8ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:29:07,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-03 14:29:07,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 80. [2021-05-03 14:29:07,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:07,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2021-05-03 14:29:07,236 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 16 [2021-05-03 14:29:07,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:07,236 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2021-05-03 14:29:07,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:07,236 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2021-05-03 14:29:07,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:07,236 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:07,237 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:07,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:07,445 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:07,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:07,445 INFO L82 PathProgramCache]: Analyzing trace with hash -543344739, now seen corresponding path program 37 times [2021-05-03 14:29:07,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:07,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102111646] [2021-05-03 14:29:07,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:07,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102111646] [2021-05-03 14:29:07,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494119205] [2021-05-03 14:29:07,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:07,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:29:07,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:07,849 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 14:29:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:07,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:07,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:29:07,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098703795] [2021-05-03 14:29:07,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:29:07,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:07,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:29:07,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:29:07,958 INFO L87 Difference]: Start difference. First operand 80 states and 164 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:08,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:08,289 INFO L93 Difference]: Finished difference Result 115 states and 215 transitions. [2021-05-03 14:29:08,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:29:08,289 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:08,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:08,290 INFO L225 Difference]: With dead ends: 115 [2021-05-03 14:29:08,290 INFO L226 Difference]: Without dead ends: 96 [2021-05-03 14:29:08,290 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 551.5ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:29:08,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-03 14:29:08,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 79. [2021-05-03 14:29:08,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 78 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:08,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 161 transitions. [2021-05-03 14:29:08,292 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 161 transitions. Word has length 16 [2021-05-03 14:29:08,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:08,292 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 161 transitions. [2021-05-03 14:29:08,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:08,292 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 161 transitions. [2021-05-03 14:29:08,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:08,293 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:08,293 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:08,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-05-03 14:29:08,513 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:08,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:08,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1081200317, now seen corresponding path program 38 times [2021-05-03 14:29:08,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:08,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575408443] [2021-05-03 14:29:08,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:08,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:08,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575408443] [2021-05-03 14:29:08,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697800870] [2021-05-03 14:29:08,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:08,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:29:08,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:08,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:29:08,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:09,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:09,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:09,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:29:09,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305663004] [2021-05-03 14:29:09,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:29:09,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:09,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:29:09,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:29:09,022 INFO L87 Difference]: Start difference. First operand 79 states and 161 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:09,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:09,604 INFO L93 Difference]: Finished difference Result 140 states and 265 transitions. [2021-05-03 14:29:09,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:29:09,604 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:09,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:09,605 INFO L225 Difference]: With dead ends: 140 [2021-05-03 14:29:09,605 INFO L226 Difference]: Without dead ends: 114 [2021-05-03 14:29:09,605 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 784.4ms TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:29:09,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-03 14:29:09,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 81. [2021-05-03 14:29:09,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.075) internal successors, (166), 80 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:09,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 166 transitions. [2021-05-03 14:29:09,607 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 166 transitions. Word has length 16 [2021-05-03 14:29:09,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:09,607 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 166 transitions. [2021-05-03 14:29:09,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:09,608 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 166 transitions. [2021-05-03 14:29:09,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:09,608 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:09,608 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:09,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:09,829 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:09,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:09,829 INFO L82 PathProgramCache]: Analyzing trace with hash -861394220, now seen corresponding path program 39 times [2021-05-03 14:29:09,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:09,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434621075] [2021-05-03 14:29:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:29:09,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434621075] [2021-05-03 14:29:09,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204280755] [2021-05-03 14:29:09,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:09,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:29:09,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:09,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:29:09,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:29:10,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:10,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:29:10,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170463548] [2021-05-03 14:29:10,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:29:10,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:10,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:29:10,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:29:10,021 INFO L87 Difference]: Start difference. First operand 81 states and 166 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:10,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:10,121 INFO L93 Difference]: Finished difference Result 97 states and 197 transitions. [2021-05-03 14:29:10,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:29:10,121 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:10,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:10,124 INFO L225 Difference]: With dead ends: 97 [2021-05-03 14:29:10,125 INFO L226 Difference]: Without dead ends: 97 [2021-05-03 14:29:10,125 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:29:10,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-03 14:29:10,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 82. [2021-05-03 14:29:10,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.074074074074074) internal successors, (168), 81 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:10,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 168 transitions. [2021-05-03 14:29:10,126 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 168 transitions. Word has length 16 [2021-05-03 14:29:10,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:10,126 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 168 transitions. [2021-05-03 14:29:10,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:10,127 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 168 transitions. [2021-05-03 14:29:10,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:10,127 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:10,127 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:10,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-05-03 14:29:10,347 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:10,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:10,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1305488025, now seen corresponding path program 40 times [2021-05-03 14:29:10,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:10,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501886658] [2021-05-03 14:29:10,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:10,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501886658] [2021-05-03 14:29:10,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721819259] [2021-05-03 14:29:10,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:10,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:29:10,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:10,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:29:10,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:10,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:10,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:29:10,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577889892] [2021-05-03 14:29:10,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:29:10,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:10,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:29:10,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:29:10,853 INFO L87 Difference]: Start difference. First operand 82 states and 168 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:11,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:11,269 INFO L93 Difference]: Finished difference Result 110 states and 210 transitions. [2021-05-03 14:29:11,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:29:11,270 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:11,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:11,270 INFO L225 Difference]: With dead ends: 110 [2021-05-03 14:29:11,270 INFO L226 Difference]: Without dead ends: 103 [2021-05-03 14:29:11,270 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 663.7ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:29:11,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-03 14:29:11,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2021-05-03 14:29:11,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0714285714285716) internal successors, (174), 84 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:11,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 174 transitions. [2021-05-03 14:29:11,273 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 174 transitions. Word has length 16 [2021-05-03 14:29:11,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:11,273 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 174 transitions. [2021-05-03 14:29:11,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:11,274 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 174 transitions. [2021-05-03 14:29:11,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:11,274 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:11,274 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:11,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:11,498 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:11,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:11,498 INFO L82 PathProgramCache]: Analyzing trace with hash -271853705, now seen corresponding path program 41 times [2021-05-03 14:29:11,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:11,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953271725] [2021-05-03 14:29:11,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:11,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953271725] [2021-05-03 14:29:11,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177881893] [2021-05-03 14:29:11,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:11,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:29:11,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:11,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:29:11,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:11,962 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 14:29:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:12,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:12,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:29:12,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211281240] [2021-05-03 14:29:12,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:29:12,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:12,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:29:12,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:29:12,160 INFO L87 Difference]: Start difference. First operand 85 states and 174 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:12,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:12,827 INFO L93 Difference]: Finished difference Result 117 states and 222 transitions. [2021-05-03 14:29:12,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:29:12,827 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:12,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:12,828 INFO L225 Difference]: With dead ends: 117 [2021-05-03 14:29:12,828 INFO L226 Difference]: Without dead ends: 100 [2021-05-03 14:29:12,828 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1035.0ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:29:12,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-03 14:29:12,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2021-05-03 14:29:12,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.072289156626506) internal successors, (172), 83 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:12,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 172 transitions. [2021-05-03 14:29:12,829 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 172 transitions. Word has length 16 [2021-05-03 14:29:12,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:12,830 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 172 transitions. [2021-05-03 14:29:12,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:12,830 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 172 transitions. [2021-05-03 14:29:12,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:12,830 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:12,830 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:13,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-05-03 14:29:13,031 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:13,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:13,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1062737625, now seen corresponding path program 42 times [2021-05-03 14:29:13,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:13,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257677199] [2021-05-03 14:29:13,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:13,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257677199] [2021-05-03 14:29:13,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702166081] [2021-05-03 14:29:13,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:13,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:29:13,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:13,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:29:13,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:13,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:13,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:29:13,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917934288] [2021-05-03 14:29:13,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:29:13,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:13,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:29:13,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:29:13,606 INFO L87 Difference]: Start difference. First operand 84 states and 172 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:14,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:14,198 INFO L93 Difference]: Finished difference Result 125 states and 240 transitions. [2021-05-03 14:29:14,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:29:14,198 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:14,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:14,198 INFO L225 Difference]: With dead ends: 125 [2021-05-03 14:29:14,198 INFO L226 Difference]: Without dead ends: 99 [2021-05-03 14:29:14,199 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 847.7ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:29:14,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-03 14:29:14,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 82. [2021-05-03 14:29:14,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.074074074074074) internal successors, (168), 81 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:14,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 168 transitions. [2021-05-03 14:29:14,201 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 168 transitions. Word has length 16 [2021-05-03 14:29:14,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:14,201 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 168 transitions. [2021-05-03 14:29:14,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:14,201 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 168 transitions. [2021-05-03 14:29:14,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:14,201 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:14,201 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:14,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:14,402 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:14,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:14,402 INFO L82 PathProgramCache]: Analyzing trace with hash 441687798, now seen corresponding path program 43 times [2021-05-03 14:29:14,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:14,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935322452] [2021-05-03 14:29:14,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:29:14,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935322452] [2021-05-03 14:29:14,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163920441] [2021-05-03 14:29:14,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:14,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:29:14,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:14,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:29:14,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:14,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:29:14,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888552823] [2021-05-03 14:29:14,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:29:14,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:14,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:29:14,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:29:14,600 INFO L87 Difference]: Start difference. First operand 82 states and 168 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:14,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:14,682 INFO L93 Difference]: Finished difference Result 101 states and 206 transitions. [2021-05-03 14:29:14,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:29:14,683 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:14,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:14,684 INFO L225 Difference]: With dead ends: 101 [2021-05-03 14:29:14,684 INFO L226 Difference]: Without dead ends: 101 [2021-05-03 14:29:14,684 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:29:14,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-03 14:29:14,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 82. [2021-05-03 14:29:14,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.074074074074074) internal successors, (168), 81 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:14,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 168 transitions. [2021-05-03 14:29:14,686 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 168 transitions. Word has length 16 [2021-05-03 14:29:14,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:14,687 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 168 transitions. [2021-05-03 14:29:14,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:14,687 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 168 transitions. [2021-05-03 14:29:14,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:14,687 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:14,687 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:14,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-05-03 14:29:14,911 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:14,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:14,912 INFO L82 PathProgramCache]: Analyzing trace with hash 234492561, now seen corresponding path program 44 times [2021-05-03 14:29:14,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:14,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354975199] [2021-05-03 14:29:14,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:15,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354975199] [2021-05-03 14:29:15,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175465088] [2021-05-03 14:29:15,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:15,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:29:15,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:15,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:29:15,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:15,366 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 14:29:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:15,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:15,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:29:15,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259199266] [2021-05-03 14:29:15,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:29:15,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:15,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:29:15,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:29:15,506 INFO L87 Difference]: Start difference. First operand 82 states and 168 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:16,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:16,202 INFO L93 Difference]: Finished difference Result 131 states and 245 transitions. [2021-05-03 14:29:16,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:29:16,202 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:16,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:16,203 INFO L225 Difference]: With dead ends: 131 [2021-05-03 14:29:16,203 INFO L226 Difference]: Without dead ends: 106 [2021-05-03 14:29:16,203 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 972.5ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:29:16,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-03 14:29:16,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2021-05-03 14:29:16,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0952380952380953) internal successors, (176), 84 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:16,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 176 transitions. [2021-05-03 14:29:16,205 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 176 transitions. Word has length 16 [2021-05-03 14:29:16,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:16,205 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 176 transitions. [2021-05-03 14:29:16,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:16,205 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 176 transitions. [2021-05-03 14:29:16,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:16,206 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:16,206 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:16,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-05-03 14:29:16,409 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:16,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:16,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1031228313, now seen corresponding path program 45 times [2021-05-03 14:29:16,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:16,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440044517] [2021-05-03 14:29:16,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:16,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:16,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:16,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440044517] [2021-05-03 14:29:16,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604310015] [2021-05-03 14:29:16,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:16,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:29:16,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:16,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:29:16,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:16,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:16,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:29:16,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971416981] [2021-05-03 14:29:16,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:29:16,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:16,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:29:16,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:29:16,923 INFO L87 Difference]: Start difference. First operand 85 states and 176 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:17,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:17,584 INFO L93 Difference]: Finished difference Result 168 states and 312 transitions. [2021-05-03 14:29:17,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:29:17,584 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:17,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:17,585 INFO L225 Difference]: With dead ends: 168 [2021-05-03 14:29:17,585 INFO L226 Difference]: Without dead ends: 149 [2021-05-03 14:29:17,585 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 794.6ms TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:29:17,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-03 14:29:17,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 87. [2021-05-03 14:29:17,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.104651162790698) internal successors, (181), 86 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:17,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 181 transitions. [2021-05-03 14:29:17,588 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 181 transitions. Word has length 16 [2021-05-03 14:29:17,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:17,588 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 181 transitions. [2021-05-03 14:29:17,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:17,588 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 181 transitions. [2021-05-03 14:29:17,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:17,589 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:17,589 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:17,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:17,789 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:17,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:17,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1248642377, now seen corresponding path program 46 times [2021-05-03 14:29:17,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:17,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505998644] [2021-05-03 14:29:17,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:17,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:17,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505998644] [2021-05-03 14:29:17,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431853770] [2021-05-03 14:29:17,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:17,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:29:17,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:17,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:29:17,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:18,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:18,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:29:18,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757442310] [2021-05-03 14:29:18,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:29:18,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:18,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:29:18,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:29:18,288 INFO L87 Difference]: Start difference. First operand 87 states and 181 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:18,580 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-05-03 14:29:19,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:19,274 INFO L93 Difference]: Finished difference Result 161 states and 302 transitions. [2021-05-03 14:29:19,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:29:19,275 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:19,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:19,275 INFO L225 Difference]: With dead ends: 161 [2021-05-03 14:29:19,275 INFO L226 Difference]: Without dead ends: 141 [2021-05-03 14:29:19,275 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1119.5ms TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:29:19,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-03 14:29:19,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 92. [2021-05-03 14:29:19,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.131868131868132) internal successors, (194), 91 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:19,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 194 transitions. [2021-05-03 14:29:19,278 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 194 transitions. Word has length 16 [2021-05-03 14:29:19,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:19,278 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 194 transitions. [2021-05-03 14:29:19,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:19,278 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 194 transitions. [2021-05-03 14:29:19,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:19,279 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:19,279 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:19,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2021-05-03 14:29:19,501 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:19,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:19,502 INFO L82 PathProgramCache]: Analyzing trace with hash -565135694, now seen corresponding path program 47 times [2021-05-03 14:29:19,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:19,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365552546] [2021-05-03 14:29:19,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:29:19,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365552546] [2021-05-03 14:29:19,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742507542] [2021-05-03 14:29:19,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:19,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:29:19,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:19,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:29:19,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:29:19,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:19,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:29:19,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858244865] [2021-05-03 14:29:19,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:29:19,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:19,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:29:19,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:29:19,728 INFO L87 Difference]: Start difference. First operand 92 states and 194 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:19,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:19,766 INFO L93 Difference]: Finished difference Result 98 states and 204 transitions. [2021-05-03 14:29:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:29:19,766 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:19,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:19,766 INFO L225 Difference]: With dead ends: 98 [2021-05-03 14:29:19,766 INFO L226 Difference]: Without dead ends: 98 [2021-05-03 14:29:19,767 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 147.7ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:29:19,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-03 14:29:19,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2021-05-03 14:29:19,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.120879120879121) internal successors, (193), 91 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:19,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 193 transitions. [2021-05-03 14:29:19,769 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 193 transitions. Word has length 16 [2021-05-03 14:29:19,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:19,769 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 193 transitions. [2021-05-03 14:29:19,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:19,769 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 193 transitions. [2021-05-03 14:29:19,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:19,769 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:19,769 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:19,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:19,977 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:19,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:19,977 INFO L82 PathProgramCache]: Analyzing trace with hash -451906625, now seen corresponding path program 48 times [2021-05-03 14:29:19,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:19,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550534940] [2021-05-03 14:29:19,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:20,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:20,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550534940] [2021-05-03 14:29:20,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640576572] [2021-05-03 14:29:20,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:20,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:29:20,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:20,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:29:20,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:20,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:20,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:29:20,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789858895] [2021-05-03 14:29:20,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:29:20,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:20,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:29:20,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:29:20,508 INFO L87 Difference]: Start difference. First operand 92 states and 193 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:21,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:21,003 INFO L93 Difference]: Finished difference Result 161 states and 306 transitions. [2021-05-03 14:29:21,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:29:21,004 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:21,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:21,004 INFO L225 Difference]: With dead ends: 161 [2021-05-03 14:29:21,004 INFO L226 Difference]: Without dead ends: 139 [2021-05-03 14:29:21,005 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 682.2ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:29:21,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-03 14:29:21,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 93. [2021-05-03 14:29:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.119565217391304) internal successors, (195), 92 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:21,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 195 transitions. [2021-05-03 14:29:21,007 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 195 transitions. Word has length 16 [2021-05-03 14:29:21,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:21,007 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 195 transitions. [2021-05-03 14:29:21,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:21,007 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 195 transitions. [2021-05-03 14:29:21,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:21,008 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:21,008 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:21,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:21,208 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:21,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:21,209 INFO L82 PathProgramCache]: Analyzing trace with hash 54439641, now seen corresponding path program 49 times [2021-05-03 14:29:21,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:21,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768533658] [2021-05-03 14:29:21,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:21,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768533658] [2021-05-03 14:29:21,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897423650] [2021-05-03 14:29:21,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:21,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:29:21,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:21,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:21,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:21,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:29:21,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924360458] [2021-05-03 14:29:21,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:29:21,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:21,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:29:21,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:29:21,800 INFO L87 Difference]: Start difference. First operand 93 states and 195 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:22,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:22,791 INFO L93 Difference]: Finished difference Result 182 states and 342 transitions. [2021-05-03 14:29:22,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:29:22,791 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:22,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:22,792 INFO L225 Difference]: With dead ends: 182 [2021-05-03 14:29:22,792 INFO L226 Difference]: Without dead ends: 147 [2021-05-03 14:29:22,792 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1207.2ms TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:29:22,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-03 14:29:22,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 94. [2021-05-03 14:29:22,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.118279569892473) internal successors, (197), 93 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:22,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 197 transitions. [2021-05-03 14:29:22,794 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 197 transitions. Word has length 16 [2021-05-03 14:29:22,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:22,794 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 197 transitions. [2021-05-03 14:29:22,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 197 transitions. [2021-05-03 14:29:22,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:22,795 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:22,795 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:23,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:23,017 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:23,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:23,017 INFO L82 PathProgramCache]: Analyzing trace with hash -12771748, now seen corresponding path program 50 times [2021-05-03 14:29:23,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:23,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717566411] [2021-05-03 14:29:23,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:23,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:23,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:29:23,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717566411] [2021-05-03 14:29:23,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550858800] [2021-05-03 14:29:23,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:23,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:29:23,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:23,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:29:23,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:29:23,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:23,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:29:23,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385274127] [2021-05-03 14:29:23,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:29:23,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:23,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:29:23,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:29:23,191 INFO L87 Difference]: Start difference. First operand 94 states and 197 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:23,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:23,315 INFO L93 Difference]: Finished difference Result 107 states and 221 transitions. [2021-05-03 14:29:23,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:29:23,315 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:23,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:23,316 INFO L225 Difference]: With dead ends: 107 [2021-05-03 14:29:23,316 INFO L226 Difference]: Without dead ends: 107 [2021-05-03 14:29:23,316 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 169.1ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:29:23,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-03 14:29:23,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2021-05-03 14:29:23,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.108695652173913) internal successors, (194), 92 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:23,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 194 transitions. [2021-05-03 14:29:23,322 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 194 transitions. Word has length 16 [2021-05-03 14:29:23,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:23,322 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 194 transitions. [2021-05-03 14:29:23,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:23,322 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 194 transitions. [2021-05-03 14:29:23,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:23,322 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:23,322 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:23,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-05-03 14:29:23,545 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:23,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:23,545 INFO L82 PathProgramCache]: Analyzing trace with hash -2140856799, now seen corresponding path program 51 times [2021-05-03 14:29:23,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:23,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731856870] [2021-05-03 14:29:23,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:23,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:23,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:23,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731856870] [2021-05-03 14:29:23,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65479424] [2021-05-03 14:29:23,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:23,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:29:23,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:23,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:29:23,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:24,022 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 14:29:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:24,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:24,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:29:24,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666479003] [2021-05-03 14:29:24,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:29:24,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:24,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:29:24,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:29:24,215 INFO L87 Difference]: Start difference. First operand 93 states and 194 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:24,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:24,635 INFO L93 Difference]: Finished difference Result 109 states and 217 transitions. [2021-05-03 14:29:24,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:29:24,636 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:24,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:24,636 INFO L225 Difference]: With dead ends: 109 [2021-05-03 14:29:24,636 INFO L226 Difference]: Without dead ends: 96 [2021-05-03 14:29:24,636 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 825.1ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:29:24,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-03 14:29:24,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2021-05-03 14:29:24,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.10752688172043) internal successors, (196), 93 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:24,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 196 transitions. [2021-05-03 14:29:24,638 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 196 transitions. Word has length 16 [2021-05-03 14:29:24,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:24,638 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 196 transitions. [2021-05-03 14:29:24,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:24,638 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 196 transitions. [2021-05-03 14:29:24,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:24,641 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:24,641 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:24,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable317 [2021-05-03 14:29:24,841 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:24,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:24,842 INFO L82 PathProgramCache]: Analyzing trace with hash 576768767, now seen corresponding path program 52 times [2021-05-03 14:29:24,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:24,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858029742] [2021-05-03 14:29:24,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:24,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858029742] [2021-05-03 14:29:24,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286899619] [2021-05-03 14:29:24,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:25,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:29:25,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:25,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:29:25,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:25,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:25,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:25,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:29:25,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671393631] [2021-05-03 14:29:25,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:29:25,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:25,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:29:25,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:29:25,333 INFO L87 Difference]: Start difference. First operand 94 states and 196 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:25,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:25,926 INFO L93 Difference]: Finished difference Result 134 states and 261 transitions. [2021-05-03 14:29:25,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:29:25,926 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:25,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:25,927 INFO L225 Difference]: With dead ends: 134 [2021-05-03 14:29:25,927 INFO L226 Difference]: Without dead ends: 127 [2021-05-03 14:29:25,927 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 790.2ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:29:25,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-03 14:29:25,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 95. [2021-05-03 14:29:25,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.117021276595745) internal successors, (199), 94 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 199 transitions. [2021-05-03 14:29:25,929 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 199 transitions. Word has length 16 [2021-05-03 14:29:25,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:25,929 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 199 transitions. [2021-05-03 14:29:25,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:25,930 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 199 transitions. [2021-05-03 14:29:25,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:25,930 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:25,930 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:26,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-05-03 14:29:26,141 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:26,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:26,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1911360097, now seen corresponding path program 53 times [2021-05-03 14:29:26,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:26,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978789292] [2021-05-03 14:29:26,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:26,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978789292] [2021-05-03 14:29:26,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10664376] [2021-05-03 14:29:26,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:26,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:29:26,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:26,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:29:26,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:26,509 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 14:29:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:26,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:26,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:29:26,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385467641] [2021-05-03 14:29:26,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:29:26,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:26,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:29:26,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:29:26,699 INFO L87 Difference]: Start difference. First operand 95 states and 199 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:27,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:27,263 INFO L93 Difference]: Finished difference Result 148 states and 281 transitions. [2021-05-03 14:29:27,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:29:27,264 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:27,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:27,264 INFO L225 Difference]: With dead ends: 148 [2021-05-03 14:29:27,264 INFO L226 Difference]: Without dead ends: 129 [2021-05-03 14:29:27,264 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 810.8ms TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:29:27,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-03 14:29:27,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 95. [2021-05-03 14:29:27,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.117021276595745) internal successors, (199), 94 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:27,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 199 transitions. [2021-05-03 14:29:27,266 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 199 transitions. Word has length 16 [2021-05-03 14:29:27,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:27,266 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 199 transitions. [2021-05-03 14:29:27,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:27,266 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 199 transitions. [2021-05-03 14:29:27,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:27,267 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:27,267 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:27,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-05-03 14:29:27,477 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:27,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:27,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1290310270, now seen corresponding path program 54 times [2021-05-03 14:29:27,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:27,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758230281] [2021-05-03 14:29:27,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:29:27,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758230281] [2021-05-03 14:29:27,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790244978] [2021-05-03 14:29:27,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:27,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:29:27,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:27,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:29:27,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:29:27,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:27,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:29:27,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870596093] [2021-05-03 14:29:27,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:29:27,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:27,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:29:27,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:29:27,655 INFO L87 Difference]: Start difference. First operand 95 states and 199 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:27,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:27,762 INFO L93 Difference]: Finished difference Result 112 states and 232 transitions. [2021-05-03 14:29:27,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:29:27,763 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:27,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:27,763 INFO L225 Difference]: With dead ends: 112 [2021-05-03 14:29:27,763 INFO L226 Difference]: Without dead ends: 112 [2021-05-03 14:29:27,763 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:29:27,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-03 14:29:27,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2021-05-03 14:29:27,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.118279569892473) internal successors, (197), 93 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:27,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 197 transitions. [2021-05-03 14:29:27,766 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 197 transitions. Word has length 16 [2021-05-03 14:29:27,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:27,766 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 197 transitions. [2021-05-03 14:29:27,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:27,766 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 197 transitions. [2021-05-03 14:29:27,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:27,767 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:27,767 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:27,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2021-05-03 14:29:27,988 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:27,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:27,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1083115033, now seen corresponding path program 55 times [2021-05-03 14:29:27,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:27,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701355873] [2021-05-03 14:29:27,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:27,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:28,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701355873] [2021-05-03 14:29:28,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951848775] [2021-05-03 14:29:28,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:28,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:29:28,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:28,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:28,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:29:28,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272901056] [2021-05-03 14:29:28,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:29:28,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:28,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:29:28,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:29:28,459 INFO L87 Difference]: Start difference. First operand 94 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:29,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:29,134 INFO L93 Difference]: Finished difference Result 146 states and 279 transitions. [2021-05-03 14:29:29,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:29:29,135 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:29,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:29,136 INFO L225 Difference]: With dead ends: 146 [2021-05-03 14:29:29,136 INFO L226 Difference]: Without dead ends: 139 [2021-05-03 14:29:29,136 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 849.4ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:29:29,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-03 14:29:29,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 96. [2021-05-03 14:29:29,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:29,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2021-05-03 14:29:29,138 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 16 [2021-05-03 14:29:29,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:29,138 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2021-05-03 14:29:29,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:29,138 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2021-05-03 14:29:29,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:29,139 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:29,139 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:29,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:29,361 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:29,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:29,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1877260933, now seen corresponding path program 56 times [2021-05-03 14:29:29,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:29,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944667027] [2021-05-03 14:29:29,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:29,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:29,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944667027] [2021-05-03 14:29:29,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192945880] [2021-05-03 14:29:29,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:29,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:29:29,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:29,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:29:29,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:29,779 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 14:29:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:29,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:29,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:29:29,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241487696] [2021-05-03 14:29:29,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:29:29,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:29,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:29:29,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:29:29,903 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:30,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:30,618 INFO L93 Difference]: Finished difference Result 167 states and 318 transitions. [2021-05-03 14:29:30,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:29:30,619 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:30,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:30,619 INFO L225 Difference]: With dead ends: 167 [2021-05-03 14:29:30,619 INFO L226 Difference]: Without dead ends: 144 [2021-05-03 14:29:30,619 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 952.8ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:29:30,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-03 14:29:30,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 98. [2021-05-03 14:29:30,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.134020618556701) internal successors, (207), 97 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:30,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 207 transitions. [2021-05-03 14:29:30,622 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 207 transitions. Word has length 16 [2021-05-03 14:29:30,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:30,622 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 207 transitions. [2021-05-03 14:29:30,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:30,622 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 207 transitions. [2021-05-03 14:29:30,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:30,622 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:30,622 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:30,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:30,823 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:30,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:30,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1879850785, now seen corresponding path program 57 times [2021-05-03 14:29:30,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:30,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504432916] [2021-05-03 14:29:30,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:31,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:31,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504432916] [2021-05-03 14:29:31,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121115415] [2021-05-03 14:29:31,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:31,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:29:31,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:31,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:29:31,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:31,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:31,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:31,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:29:31,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767790429] [2021-05-03 14:29:31,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:29:31,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:31,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:29:31,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:29:31,368 INFO L87 Difference]: Start difference. First operand 98 states and 207 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:31,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:31,856 INFO L93 Difference]: Finished difference Result 161 states and 319 transitions. [2021-05-03 14:29:31,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:29:31,857 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:31,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:31,857 INFO L225 Difference]: With dead ends: 161 [2021-05-03 14:29:31,857 INFO L226 Difference]: Without dead ends: 142 [2021-05-03 14:29:31,858 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 725.6ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:29:31,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-03 14:29:31,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 98. [2021-05-03 14:29:31,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.134020618556701) internal successors, (207), 97 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:31,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 207 transitions. [2021-05-03 14:29:31,860 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 207 transitions. Word has length 16 [2021-05-03 14:29:31,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:31,860 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 207 transitions. [2021-05-03 14:29:31,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:31,860 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 207 transitions. [2021-05-03 14:29:31,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:31,861 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:31,861 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:32,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:32,073 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:32,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:32,073 INFO L82 PathProgramCache]: Analyzing trace with hash -400019905, now seen corresponding path program 58 times [2021-05-03 14:29:32,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:32,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912981506] [2021-05-03 14:29:32,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:32,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912981506] [2021-05-03 14:29:32,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378125703] [2021-05-03 14:29:32,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:32,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:29:32,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:32,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:29:32,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:32,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:32,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:32,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:29:32,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95491149] [2021-05-03 14:29:32,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:29:32,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:32,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:29:32,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:29:32,591 INFO L87 Difference]: Start difference. First operand 98 states and 207 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:32,974 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-05-03 14:29:33,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:33,349 INFO L93 Difference]: Finished difference Result 134 states and 270 transitions. [2021-05-03 14:29:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:29:33,349 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:33,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:33,349 INFO L225 Difference]: With dead ends: 134 [2021-05-03 14:29:33,350 INFO L226 Difference]: Without dead ends: 127 [2021-05-03 14:29:33,350 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 928.1ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:29:33,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-03 14:29:33,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 99. [2021-05-03 14:29:33,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.1530612244897958) internal successors, (211), 98 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:33,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 211 transitions. [2021-05-03 14:29:33,352 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 211 transitions. Word has length 16 [2021-05-03 14:29:33,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:33,353 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 211 transitions. [2021-05-03 14:29:33,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:33,353 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 211 transitions. [2021-05-03 14:29:33,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:33,353 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:33,354 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:33,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:33,569 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:33,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:33,569 INFO L82 PathProgramCache]: Analyzing trace with hash 283486778, now seen corresponding path program 59 times [2021-05-03 14:29:33,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:33,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181755009] [2021-05-03 14:29:33,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:29:33,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181755009] [2021-05-03 14:29:33,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685555009] [2021-05-03 14:29:33,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:33,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:29:33,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:33,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:29:33,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:29:33,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:33,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:29:33,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366643488] [2021-05-03 14:29:33,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:29:33,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:33,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:29:33,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:29:33,785 INFO L87 Difference]: Start difference. First operand 99 states and 211 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:33,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:33,831 INFO L93 Difference]: Finished difference Result 99 states and 208 transitions. [2021-05-03 14:29:33,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:29:33,831 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:33,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:33,832 INFO L225 Difference]: With dead ends: 99 [2021-05-03 14:29:33,832 INFO L226 Difference]: Without dead ends: 99 [2021-05-03 14:29:33,832 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 144.0ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:29:33,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-03 14:29:33,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2021-05-03 14:29:33,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.1538461538461537) internal successors, (196), 91 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:33,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 196 transitions. [2021-05-03 14:29:33,834 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 196 transitions. Word has length 16 [2021-05-03 14:29:33,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:33,834 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 196 transitions. [2021-05-03 14:29:33,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:33,834 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 196 transitions. [2021-05-03 14:29:33,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:33,835 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:33,835 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:34,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:34,037 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:34,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:34,037 INFO L82 PathProgramCache]: Analyzing trace with hash 934571425, now seen corresponding path program 60 times [2021-05-03 14:29:34,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:34,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758901779] [2021-05-03 14:29:34,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:34,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758901779] [2021-05-03 14:29:34,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986174217] [2021-05-03 14:29:34,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:34,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:29:34,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:34,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:29:34,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:34,472 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 14:29:34,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:34,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:34,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:29:34,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998606706] [2021-05-03 14:29:34,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:29:34,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:34,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:29:34,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:29:34,592 INFO L87 Difference]: Start difference. First operand 92 states and 196 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:35,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:35,327 INFO L93 Difference]: Finished difference Result 150 states and 289 transitions. [2021-05-03 14:29:35,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:29:35,328 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:35,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:35,328 INFO L225 Difference]: With dead ends: 150 [2021-05-03 14:29:35,328 INFO L226 Difference]: Without dead ends: 124 [2021-05-03 14:29:35,329 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 968.9ms TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:29:35,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-03 14:29:35,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2021-05-03 14:29:35,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.1538461538461537) internal successors, (196), 91 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:35,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 196 transitions. [2021-05-03 14:29:35,331 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 196 transitions. Word has length 16 [2021-05-03 14:29:35,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:35,331 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 196 transitions. [2021-05-03 14:29:35,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:35,331 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 196 transitions. [2021-05-03 14:29:35,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:35,331 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:35,332 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:35,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-05-03 14:29:35,554 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:35,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:35,554 INFO L82 PathProgramCache]: Analyzing trace with hash 396715847, now seen corresponding path program 61 times [2021-05-03 14:29:35,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:35,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869296884] [2021-05-03 14:29:35,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:35,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869296884] [2021-05-03 14:29:35,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072609106] [2021-05-03 14:29:35,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:35,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:29:35,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:36,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:36,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:29:36,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635774979] [2021-05-03 14:29:36,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:29:36,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:36,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:29:36,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:29:36,119 INFO L87 Difference]: Start difference. First operand 92 states and 196 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:36,404 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2021-05-03 14:29:36,850 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2021-05-03 14:29:37,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:37,209 INFO L93 Difference]: Finished difference Result 152 states and 299 transitions. [2021-05-03 14:29:37,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:29:37,209 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:37,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:37,210 INFO L225 Difference]: With dead ends: 152 [2021-05-03 14:29:37,210 INFO L226 Difference]: Without dead ends: 123 [2021-05-03 14:29:37,210 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1339.1ms TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:29:37,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-03 14:29:37,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 95. [2021-05-03 14:29:37,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1702127659574466) internal successors, (204), 94 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:37,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 204 transitions. [2021-05-03 14:29:37,212 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 204 transitions. Word has length 16 [2021-05-03 14:29:37,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:37,212 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 204 transitions. [2021-05-03 14:29:37,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:37,212 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 204 transitions. [2021-05-03 14:29:37,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:37,212 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:37,213 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:37,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:37,413 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:37,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:37,414 INFO L82 PathProgramCache]: Analyzing trace with hash 903062113, now seen corresponding path program 62 times [2021-05-03 14:29:37,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:37,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187169667] [2021-05-03 14:29:37,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:37,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187169667] [2021-05-03 14:29:37,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654930683] [2021-05-03 14:29:37,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:37,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:29:37,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:37,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:29:37,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:37,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:37,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:37,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:29:37,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512504029] [2021-05-03 14:29:37,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:29:37,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:37,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:29:37,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:29:37,972 INFO L87 Difference]: Start difference. First operand 95 states and 204 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:39,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:39,350 INFO L93 Difference]: Finished difference Result 184 states and 352 transitions. [2021-05-03 14:29:39,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:29:39,350 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:39,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:39,351 INFO L225 Difference]: With dead ends: 184 [2021-05-03 14:29:39,351 INFO L226 Difference]: Without dead ends: 128 [2021-05-03 14:29:39,351 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1549.2ms TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:29:39,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-03 14:29:39,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2021-05-03 14:29:39,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1683168316831685) internal successors, (219), 101 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:39,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 219 transitions. [2021-05-03 14:29:39,353 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 219 transitions. Word has length 16 [2021-05-03 14:29:39,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:39,353 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 219 transitions. [2021-05-03 14:29:39,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:39,353 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 219 transitions. [2021-05-03 14:29:39,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:39,354 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:39,354 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:39,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:39,557 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:39,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:39,557 INFO L82 PathProgramCache]: Analyzing trace with hash 444951547, now seen corresponding path program 63 times [2021-05-03 14:29:39,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:39,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791861942] [2021-05-03 14:29:39,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:39,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:39,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791861942] [2021-05-03 14:29:39,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731384582] [2021-05-03 14:29:39,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:39,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:29:39,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:39,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:29:39,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:40,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:40,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:40,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:29:40,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748214175] [2021-05-03 14:29:40,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:29:40,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:40,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:29:40,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:29:40,137 INFO L87 Difference]: Start difference. First operand 102 states and 219 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:40,645 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-05-03 14:29:40,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:40,827 INFO L93 Difference]: Finished difference Result 136 states and 277 transitions. [2021-05-03 14:29:40,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:29:40,827 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:40,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:40,828 INFO L225 Difference]: With dead ends: 136 [2021-05-03 14:29:40,828 INFO L226 Difference]: Without dead ends: 129 [2021-05-03 14:29:40,828 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 935.8ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:29:40,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-03 14:29:40,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 103. [2021-05-03 14:29:40,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.176470588235294) internal successors, (222), 102 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:40,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 222 transitions. [2021-05-03 14:29:40,830 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 222 transitions. Word has length 16 [2021-05-03 14:29:40,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:40,830 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 222 transitions. [2021-05-03 14:29:40,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:40,831 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 222 transitions. [2021-05-03 14:29:40,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:40,831 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:40,831 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:41,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:41,032 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:41,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:41,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1779542877, now seen corresponding path program 64 times [2021-05-03 14:29:41,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:41,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443999776] [2021-05-03 14:29:41,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:41,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:41,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443999776] [2021-05-03 14:29:41,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381552698] [2021-05-03 14:29:41,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:41,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:29:41,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:41,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:29:41,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:41,450 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 14:29:41,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:41,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:41,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:29:41,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834100403] [2021-05-03 14:29:41,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:29:41,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:41,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:29:41,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:29:41,558 INFO L87 Difference]: Start difference. First operand 103 states and 222 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:42,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:42,159 INFO L93 Difference]: Finished difference Result 151 states and 300 transitions. [2021-05-03 14:29:42,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:29:42,159 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:42,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:42,160 INFO L225 Difference]: With dead ends: 151 [2021-05-03 14:29:42,160 INFO L226 Difference]: Without dead ends: 132 [2021-05-03 14:29:42,160 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 830.0ms TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:29:42,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-03 14:29:42,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 102. [2021-05-03 14:29:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1683168316831685) internal successors, (219), 101 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:42,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 219 transitions. [2021-05-03 14:29:42,163 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 219 transitions. Word has length 16 [2021-05-03 14:29:42,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:42,163 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 219 transitions. [2021-05-03 14:29:42,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:42,163 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 219 transitions. [2021-05-03 14:29:42,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:42,163 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:42,163 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:42,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:42,377 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:42,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:42,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1241687299, now seen corresponding path program 65 times [2021-05-03 14:29:42,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:42,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112306604] [2021-05-03 14:29:42,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:42,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112306604] [2021-05-03 14:29:42,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300437572] [2021-05-03 14:29:42,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:29:42,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:29:42,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:42,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:29:42,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:42,835 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 14:29:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:43,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:43,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:29:43,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835855089] [2021-05-03 14:29:43,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:29:43,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:43,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:29:43,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:29:43,003 INFO L87 Difference]: Start difference. First operand 102 states and 219 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:43,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:43,832 INFO L93 Difference]: Finished difference Result 154 states and 313 transitions. [2021-05-03 14:29:43,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:29:43,832 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:43,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:43,833 INFO L225 Difference]: With dead ends: 154 [2021-05-03 14:29:43,833 INFO L226 Difference]: Without dead ends: 134 [2021-05-03 14:29:43,833 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1080.5ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:29:43,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-03 14:29:43,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 104. [2021-05-03 14:29:43,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.174757281553398) internal successors, (224), 103 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:43,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 224 transitions. [2021-05-03 14:29:43,835 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 224 transitions. Word has length 16 [2021-05-03 14:29:43,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:43,835 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 224 transitions. [2021-05-03 14:29:43,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:43,835 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 224 transitions. [2021-05-03 14:29:43,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:43,836 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:43,836 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:44,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-05-03 14:29:44,050 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:44,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:44,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1748033565, now seen corresponding path program 66 times [2021-05-03 14:29:44,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:44,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737794450] [2021-05-03 14:29:44,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:44,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737794450] [2021-05-03 14:29:44,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545147427] [2021-05-03 14:29:44,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:44,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:29:44,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:44,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:29:44,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:44,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:44,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:44,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:29:44,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808299688] [2021-05-03 14:29:44,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:29:44,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:44,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:29:44,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:29:44,563 INFO L87 Difference]: Start difference. First operand 104 states and 224 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:45,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:45,519 INFO L93 Difference]: Finished difference Result 154 states and 309 transitions. [2021-05-03 14:29:45,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:29:45,520 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:45,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:45,520 INFO L225 Difference]: With dead ends: 154 [2021-05-03 14:29:45,520 INFO L226 Difference]: Without dead ends: 118 [2021-05-03 14:29:45,521 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1133.1ms TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:29:45,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-03 14:29:45,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2021-05-03 14:29:45,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.1714285714285713) internal successors, (228), 105 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:45,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 228 transitions. [2021-05-03 14:29:45,523 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 228 transitions. Word has length 16 [2021-05-03 14:29:45,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:45,523 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 228 transitions. [2021-05-03 14:29:45,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:45,523 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 228 transitions. [2021-05-03 14:29:45,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:29:45,523 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:45,524 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:45,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-05-03 14:29:45,733 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:45,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:45,733 INFO L82 PathProgramCache]: Analyzing trace with hash -2104034591, now seen corresponding path program 67 times [2021-05-03 14:29:45,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:45,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910554207] [2021-05-03 14:29:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:45,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910554207] [2021-05-03 14:29:45,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748346109] [2021-05-03 14:29:45,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:46,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:29:46,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:46,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:46,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:29:46,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978783498] [2021-05-03 14:29:46,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:29:46,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:46,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:29:46,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:29:46,326 INFO L87 Difference]: Start difference. First operand 106 states and 228 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:46,685 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-05-03 14:29:46,923 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 47 [2021-05-03 14:29:47,312 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 67 [2021-05-03 14:29:47,572 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 60 [2021-05-03 14:29:47,726 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 48 [2021-05-03 14:29:47,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:47,739 INFO L93 Difference]: Finished difference Result 188 states and 372 transitions. [2021-05-03 14:29:47,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:29:47,740 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:29:47,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:47,740 INFO L225 Difference]: With dead ends: 188 [2021-05-03 14:29:47,740 INFO L226 Difference]: Without dead ends: 145 [2021-05-03 14:29:47,741 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1617.6ms TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:29:47,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-03 14:29:47,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 111. [2021-05-03 14:29:47,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1636363636363636) internal successors, (238), 110 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:47,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 238 transitions. [2021-05-03 14:29:47,743 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 238 transitions. Word has length 16 [2021-05-03 14:29:47,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:47,743 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 238 transitions. [2021-05-03 14:29:47,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:47,743 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 238 transitions. [2021-05-03 14:29:47,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:29:47,743 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:47,744 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:47,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:47,957 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:47,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:47,957 INFO L82 PathProgramCache]: Analyzing trace with hash -570507776, now seen corresponding path program 68 times [2021-05-03 14:29:47,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:47,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606450254] [2021-05-03 14:29:47,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:48,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606450254] [2021-05-03 14:29:48,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753735362] [2021-05-03 14:29:48,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:48,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:29:48,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:48,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:29:48,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:48,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:48,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:48,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:29:48,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964911791] [2021-05-03 14:29:48,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:29:48,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:48,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:29:48,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:29:48,226 INFO L87 Difference]: Start difference. First operand 111 states and 238 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:48,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:48,439 INFO L93 Difference]: Finished difference Result 160 states and 332 transitions. [2021-05-03 14:29:48,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:29:48,439 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:29:48,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:48,440 INFO L225 Difference]: With dead ends: 160 [2021-05-03 14:29:48,440 INFO L226 Difference]: Without dead ends: 160 [2021-05-03 14:29:48,440 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 289.3ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:29:48,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-03 14:29:48,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 114. [2021-05-03 14:29:48,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.15929203539823) internal successors, (244), 113 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:48,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 244 transitions. [2021-05-03 14:29:48,442 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 244 transitions. Word has length 17 [2021-05-03 14:29:48,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:48,442 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 244 transitions. [2021-05-03 14:29:48,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:48,442 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 244 transitions. [2021-05-03 14:29:48,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:29:48,443 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:48,443 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:48,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-05-03 14:29:48,657 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:48,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:48,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1010264140, now seen corresponding path program 69 times [2021-05-03 14:29:48,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:48,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154173489] [2021-05-03 14:29:48,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:48,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154173489] [2021-05-03 14:29:48,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626526712] [2021-05-03 14:29:48,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:48,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:29:48,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:48,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:29:48,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:48,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:48,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:29:48,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365917180] [2021-05-03 14:29:48,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:29:48,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:48,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:29:48,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:29:48,959 INFO L87 Difference]: Start difference. First operand 114 states and 244 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:49,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:49,405 INFO L93 Difference]: Finished difference Result 166 states and 344 transitions. [2021-05-03 14:29:49,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:29:49,406 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:29:49,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:49,406 INFO L225 Difference]: With dead ends: 166 [2021-05-03 14:29:49,406 INFO L226 Difference]: Without dead ends: 166 [2021-05-03 14:29:49,407 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 482.3ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:29:49,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-03 14:29:49,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 114. [2021-05-03 14:29:49,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.15929203539823) internal successors, (244), 113 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:49,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 244 transitions. [2021-05-03 14:29:49,413 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 244 transitions. Word has length 17 [2021-05-03 14:29:49,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:49,413 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 244 transitions. [2021-05-03 14:29:49,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:49,413 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 244 transitions. [2021-05-03 14:29:49,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:29:49,414 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:49,414 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:49,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:49,629 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:49,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:49,629 INFO L82 PathProgramCache]: Analyzing trace with hash -60731324, now seen corresponding path program 70 times [2021-05-03 14:29:49,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:49,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747162645] [2021-05-03 14:29:49,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:49,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747162645] [2021-05-03 14:29:49,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811204615] [2021-05-03 14:29:49,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:49,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:29:49,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:49,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:29:49,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:49,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:49,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:29:49,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560226087] [2021-05-03 14:29:49,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:29:49,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:49,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:29:49,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:29:49,932 INFO L87 Difference]: Start difference. First operand 114 states and 244 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:50,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:50,354 INFO L93 Difference]: Finished difference Result 163 states and 338 transitions. [2021-05-03 14:29:50,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:29:50,354 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:29:50,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:50,355 INFO L225 Difference]: With dead ends: 163 [2021-05-03 14:29:50,355 INFO L226 Difference]: Without dead ends: 163 [2021-05-03 14:29:50,355 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 490.5ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:29:50,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-03 14:29:50,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 114. [2021-05-03 14:29:50,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.15929203539823) internal successors, (244), 113 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:50,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 244 transitions. [2021-05-03 14:29:50,357 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 244 transitions. Word has length 17 [2021-05-03 14:29:50,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:50,357 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 244 transitions. [2021-05-03 14:29:50,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:50,357 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 244 transitions. [2021-05-03 14:29:50,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:29:50,358 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:50,358 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:50,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:50,559 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:50,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:50,559 INFO L82 PathProgramCache]: Analyzing trace with hash 736004428, now seen corresponding path program 71 times [2021-05-03 14:29:50,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:50,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927691929] [2021-05-03 14:29:50,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:50,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927691929] [2021-05-03 14:29:50,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367948011] [2021-05-03 14:29:50,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:50,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:29:50,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:50,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:29:50,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:50,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:50,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:29:50,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044960359] [2021-05-03 14:29:50,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:29:50,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:50,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:29:50,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:29:50,900 INFO L87 Difference]: Start difference. First operand 114 states and 244 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:51,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:51,513 INFO L93 Difference]: Finished difference Result 168 states and 343 transitions. [2021-05-03 14:29:51,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:29:51,513 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:29:51,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:51,514 INFO L225 Difference]: With dead ends: 168 [2021-05-03 14:29:51,514 INFO L226 Difference]: Without dead ends: 165 [2021-05-03 14:29:51,514 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 687.5ms TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:29:51,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-03 14:29:51,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 114. [2021-05-03 14:29:51,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.15929203539823) internal successors, (244), 113 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:51,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 244 transitions. [2021-05-03 14:29:51,517 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 244 transitions. Word has length 17 [2021-05-03 14:29:51,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:51,517 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 244 transitions. [2021-05-03 14:29:51,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:51,517 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 244 transitions. [2021-05-03 14:29:51,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:29:51,517 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:51,517 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:51,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-05-03 14:29:51,733 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:51,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:51,733 INFO L82 PathProgramCache]: Analyzing trace with hash 528809191, now seen corresponding path program 72 times [2021-05-03 14:29:51,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:51,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030874397] [2021-05-03 14:29:51,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:51,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:51,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030874397] [2021-05-03 14:29:51,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425207718] [2021-05-03 14:29:51,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:51,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:29:51,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:51,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:29:51,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:52,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:52,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:29:52,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019290129] [2021-05-03 14:29:52,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:29:52,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:52,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:29:52,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:29:52,152 INFO L87 Difference]: Start difference. First operand 114 states and 244 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:52,750 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-05-03 14:29:53,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:53,202 INFO L93 Difference]: Finished difference Result 172 states and 346 transitions. [2021-05-03 14:29:53,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:29:53,202 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:29:53,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:53,203 INFO L225 Difference]: With dead ends: 172 [2021-05-03 14:29:53,203 INFO L226 Difference]: Without dead ends: 170 [2021-05-03 14:29:53,203 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1239.7ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:29:53,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-03 14:29:53,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 115. [2021-05-03 14:29:53,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1578947368421053) internal successors, (246), 114 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:53,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 246 transitions. [2021-05-03 14:29:53,206 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 246 transitions. Word has length 17 [2021-05-03 14:29:53,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:53,206 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 246 transitions. [2021-05-03 14:29:53,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:53,206 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 246 transitions. [2021-05-03 14:29:53,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:29:53,207 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:53,207 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:53,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:53,430 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:53,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:53,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1863400521, now seen corresponding path program 73 times [2021-05-03 14:29:53,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:53,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350611250] [2021-05-03 14:29:53,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:53,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:53,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350611250] [2021-05-03 14:29:53,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404051576] [2021-05-03 14:29:53,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:53,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:29:53,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:53,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:53,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:29:53,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24170366] [2021-05-03 14:29:53,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:29:53,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:53,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:29:53,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:29:53,828 INFO L87 Difference]: Start difference. First operand 115 states and 246 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:54,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:54,338 INFO L93 Difference]: Finished difference Result 152 states and 314 transitions. [2021-05-03 14:29:54,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:29:54,338 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:29:54,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:54,339 INFO L225 Difference]: With dead ends: 152 [2021-05-03 14:29:54,339 INFO L226 Difference]: Without dead ends: 152 [2021-05-03 14:29:54,339 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 680.6ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:29:54,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-03 14:29:54,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 114. [2021-05-03 14:29:54,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.15929203539823) internal successors, (244), 113 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:54,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 244 transitions. [2021-05-03 14:29:54,341 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 244 transitions. Word has length 17 [2021-05-03 14:29:54,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:54,341 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 244 transitions. [2021-05-03 14:29:54,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:54,342 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 244 transitions. [2021-05-03 14:29:54,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:29:54,342 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:54,342 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:54,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable496,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:54,565 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:54,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:54,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1172274526, now seen corresponding path program 74 times [2021-05-03 14:29:54,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:54,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495672280] [2021-05-03 14:29:54,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:54,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495672280] [2021-05-03 14:29:54,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606385291] [2021-05-03 14:29:54,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:54,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:29:54,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:54,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:29:54,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:54,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:54,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:54,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:29:54,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121881161] [2021-05-03 14:29:54,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:29:54,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:54,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:29:54,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:29:54,835 INFO L87 Difference]: Start difference. First operand 114 states and 244 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:55,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:55,100 INFO L93 Difference]: Finished difference Result 138 states and 290 transitions. [2021-05-03 14:29:55,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:29:55,100 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:29:55,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:55,101 INFO L225 Difference]: With dead ends: 138 [2021-05-03 14:29:55,101 INFO L226 Difference]: Without dead ends: 138 [2021-05-03 14:29:55,101 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 331.4ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:29:55,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-03 14:29:55,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 115. [2021-05-03 14:29:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1578947368421053) internal successors, (246), 114 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:55,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 246 transitions. [2021-05-03 14:29:55,103 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 246 transitions. Word has length 17 [2021-05-03 14:29:55,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:55,103 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 246 transitions. [2021-05-03 14:29:55,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:55,103 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 246 transitions. [2021-05-03 14:29:55,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:29:55,103 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:55,104 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:55,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-05-03 14:29:55,317 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:55,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:55,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2051697306, now seen corresponding path program 75 times [2021-05-03 14:29:55,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:55,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791926027] [2021-05-03 14:29:55,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:55,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791926027] [2021-05-03 14:29:55,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642434119] [2021-05-03 14:29:55,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:55,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:29:55,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:55,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:29:55,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:55,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:55,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:29:55,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269845806] [2021-05-03 14:29:55,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:29:55,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:55,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:29:55,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:29:55,604 INFO L87 Difference]: Start difference. First operand 115 states and 246 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:55,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:55,882 INFO L93 Difference]: Finished difference Result 148 states and 310 transitions. [2021-05-03 14:29:55,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:29:55,882 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:29:55,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:55,883 INFO L225 Difference]: With dead ends: 148 [2021-05-03 14:29:55,883 INFO L226 Difference]: Without dead ends: 148 [2021-05-03 14:29:55,883 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 359.7ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:29:55,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-03 14:29:55,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2021-05-03 14:29:55,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1565217391304348) internal successors, (248), 115 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:55,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 248 transitions. [2021-05-03 14:29:55,885 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 248 transitions. Word has length 17 [2021-05-03 14:29:55,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:55,885 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 248 transitions. [2021-05-03 14:29:55,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:55,885 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 248 transitions. [2021-05-03 14:29:55,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:29:55,885 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:55,885 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:56,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:56,097 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:56,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:56,097 INFO L82 PathProgramCache]: Analyzing trace with hash -319138145, now seen corresponding path program 76 times [2021-05-03 14:29:56,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:56,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176436376] [2021-05-03 14:29:56,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:56,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176436376] [2021-05-03 14:29:56,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813564609] [2021-05-03 14:29:56,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:56,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:29:56,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:56,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:29:56,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:56,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:56,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:29:56,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654876908] [2021-05-03 14:29:56,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:29:56,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:56,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:29:56,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:29:56,504 INFO L87 Difference]: Start difference. First operand 116 states and 248 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:56,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:56,805 INFO L93 Difference]: Finished difference Result 132 states and 278 transitions. [2021-05-03 14:29:56,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:29:56,806 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:29:56,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:56,807 INFO L225 Difference]: With dead ends: 132 [2021-05-03 14:29:56,807 INFO L226 Difference]: Without dead ends: 132 [2021-05-03 14:29:56,807 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 463.0ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:29:56,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-03 14:29:56,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 117. [2021-05-03 14:29:56,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1551724137931036) internal successors, (250), 116 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:56,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 250 transitions. [2021-05-03 14:29:56,809 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 250 transitions. Word has length 17 [2021-05-03 14:29:56,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:56,809 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 250 transitions. [2021-05-03 14:29:56,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:56,809 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 250 transitions. [2021-05-03 14:29:56,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:29:56,809 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:56,809 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:57,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:57,010 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:57,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:57,010 INFO L82 PathProgramCache]: Analyzing trace with hash 568562368, now seen corresponding path program 77 times [2021-05-03 14:29:57,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:57,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107183106] [2021-05-03 14:29:57,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:57,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:57,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107183106] [2021-05-03 14:29:57,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436902457] [2021-05-03 14:29:57,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:57,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:29:57,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:57,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:29:57,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:57,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:57,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:29:57,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410098846] [2021-05-03 14:29:57,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:29:57,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:57,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:29:57,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:29:57,298 INFO L87 Difference]: Start difference. First operand 117 states and 250 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:57,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:57,499 INFO L93 Difference]: Finished difference Result 140 states and 294 transitions. [2021-05-03 14:29:57,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:29:57,499 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:29:57,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:57,500 INFO L225 Difference]: With dead ends: 140 [2021-05-03 14:29:57,500 INFO L226 Difference]: Without dead ends: 140 [2021-05-03 14:29:57,500 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 253.9ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:29:57,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-03 14:29:57,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 117. [2021-05-03 14:29:57,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1551724137931036) internal successors, (250), 116 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:57,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 250 transitions. [2021-05-03 14:29:57,502 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 250 transitions. Word has length 17 [2021-05-03 14:29:57,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:57,502 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 250 transitions. [2021-05-03 14:29:57,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:57,503 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 250 transitions. [2021-05-03 14:29:57,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:29:57,503 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:57,503 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:57,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-05-03 14:29:57,704 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:57,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:57,704 INFO L82 PathProgramCache]: Analyzing trace with hash 525452262, now seen corresponding path program 78 times [2021-05-03 14:29:57,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:57,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711423273] [2021-05-03 14:29:57,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:57,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711423273] [2021-05-03 14:29:57,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983015532] [2021-05-03 14:29:57,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:57,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:29:57,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:57,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:29:57,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:58,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:58,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:29:58,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576970032] [2021-05-03 14:29:58,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:29:58,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:58,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:29:58,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:29:58,006 INFO L87 Difference]: Start difference. First operand 117 states and 250 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:58,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:58,239 INFO L93 Difference]: Finished difference Result 142 states and 299 transitions. [2021-05-03 14:29:58,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:29:58,240 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:29:58,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:58,240 INFO L225 Difference]: With dead ends: 142 [2021-05-03 14:29:58,240 INFO L226 Difference]: Without dead ends: 142 [2021-05-03 14:29:58,241 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 272.1ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:29:58,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-03 14:29:58,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 117. [2021-05-03 14:29:58,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1551724137931036) internal successors, (250), 116 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 250 transitions. [2021-05-03 14:29:58,245 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 250 transitions. Word has length 17 [2021-05-03 14:29:58,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:58,245 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 250 transitions. [2021-05-03 14:29:58,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:58,245 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 250 transitions. [2021-05-03 14:29:58,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:29:58,246 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:58,246 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:58,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:58,446 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:58,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:58,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1802273083, now seen corresponding path program 79 times [2021-05-03 14:29:58,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:58,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238296377] [2021-05-03 14:29:58,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:58,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238296377] [2021-05-03 14:29:58,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030354539] [2021-05-03 14:29:58,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:58,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:58,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:29:58,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:58,838 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 14:29:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:58,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:58,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:29:58,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131493253] [2021-05-03 14:29:58,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:29:58,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:58,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:29:58,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:29:58,904 INFO L87 Difference]: Start difference. First operand 117 states and 250 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:59,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:29:59,160 INFO L93 Difference]: Finished difference Result 141 states and 296 transitions. [2021-05-03 14:29:59,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:29:59,161 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:29:59,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:29:59,161 INFO L225 Difference]: With dead ends: 141 [2021-05-03 14:29:59,161 INFO L226 Difference]: Without dead ends: 141 [2021-05-03 14:29:59,162 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 470.0ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:29:59,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-03 14:29:59,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 116. [2021-05-03 14:29:59,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1565217391304348) internal successors, (248), 115 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:59,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 248 transitions. [2021-05-03 14:29:59,169 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 248 transitions. Word has length 17 [2021-05-03 14:29:59,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:29:59,170 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 248 transitions. [2021-05-03 14:29:59,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:29:59,170 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 248 transitions. [2021-05-03 14:29:59,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:29:59,170 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:29:59,170 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:29:59,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:59,381 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:29:59,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:29:59,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1295926817, now seen corresponding path program 80 times [2021-05-03 14:29:59,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:29:59,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86742234] [2021-05-03 14:29:59,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:29:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:29:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:59,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86742234] [2021-05-03 14:29:59,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044210083] [2021-05-03 14:29:59,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:29:59,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:29:59,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:29:59,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:29:59,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:29:59,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:29:59,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:29:59,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:29:59,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971340370] [2021-05-03 14:29:59,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:29:59,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:29:59,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:29:59,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:29:59,785 INFO L87 Difference]: Start difference. First operand 116 states and 248 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:00,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:00,319 INFO L93 Difference]: Finished difference Result 183 states and 368 transitions. [2021-05-03 14:30:00,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:30:00,320 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:00,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:00,320 INFO L225 Difference]: With dead ends: 183 [2021-05-03 14:30:00,320 INFO L226 Difference]: Without dead ends: 183 [2021-05-03 14:30:00,321 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 717.2ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:30:00,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-03 14:30:00,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 118. [2021-05-03 14:30:00,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1794871794871793) internal successors, (255), 117 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:00,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 255 transitions. [2021-05-03 14:30:00,323 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 255 transitions. Word has length 17 [2021-05-03 14:30:00,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:00,323 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 255 transitions. [2021-05-03 14:30:00,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:00,323 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 255 transitions. [2021-05-03 14:30:00,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:00,324 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:00,324 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:00,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:00,524 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:00,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:00,525 INFO L82 PathProgramCache]: Analyzing trace with hash 199159296, now seen corresponding path program 81 times [2021-05-03 14:30:00,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:00,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698148887] [2021-05-03 14:30:00,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:00,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698148887] [2021-05-03 14:30:00,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446776668] [2021-05-03 14:30:00,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:00,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:30:00,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:00,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:30:00,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:00,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:00,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:00,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098108517] [2021-05-03 14:30:00,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:00,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:00,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:00,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:00,870 INFO L87 Difference]: Start difference. First operand 118 states and 255 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:01,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:01,081 INFO L93 Difference]: Finished difference Result 153 states and 308 transitions. [2021-05-03 14:30:01,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:30:01,081 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:01,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:01,082 INFO L225 Difference]: With dead ends: 153 [2021-05-03 14:30:01,082 INFO L226 Difference]: Without dead ends: 147 [2021-05-03 14:30:01,082 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 358.0ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:30:01,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-03 14:30:01,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2021-05-03 14:30:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.1463414634146343) internal successors, (264), 123 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:01,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 264 transitions. [2021-05-03 14:30:01,086 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 264 transitions. Word has length 17 [2021-05-03 14:30:01,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:01,086 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 264 transitions. [2021-05-03 14:30:01,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:01,086 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 264 transitions. [2021-05-03 14:30:01,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:01,087 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:01,087 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:01,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-05-03 14:30:01,301 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:01,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:01,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1833782395, now seen corresponding path program 82 times [2021-05-03 14:30:01,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:01,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304581511] [2021-05-03 14:30:01,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:01,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304581511] [2021-05-03 14:30:01,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355132552] [2021-05-03 14:30:01,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:01,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:30:01,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:01,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:01,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:01,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:01,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:01,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:01,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140555217] [2021-05-03 14:30:01,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:01,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:01,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:01,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:01,621 INFO L87 Difference]: Start difference. First operand 124 states and 264 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:01,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:01,849 INFO L93 Difference]: Finished difference Result 157 states and 325 transitions. [2021-05-03 14:30:01,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:30:01,850 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:01,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:01,851 INFO L225 Difference]: With dead ends: 157 [2021-05-03 14:30:01,851 INFO L226 Difference]: Without dead ends: 157 [2021-05-03 14:30:01,851 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 301.6ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:30:01,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-03 14:30:01,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 122. [2021-05-03 14:30:01,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.12396694214876) internal successors, (257), 121 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:01,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 257 transitions. [2021-05-03 14:30:01,853 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 257 transitions. Word has length 17 [2021-05-03 14:30:01,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:01,853 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 257 transitions. [2021-05-03 14:30:01,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:01,853 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 257 transitions. [2021-05-03 14:30:01,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:01,853 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:01,853 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:02,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:02,057 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:02,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:02,057 INFO L82 PathProgramCache]: Analyzing trace with hash -111496436, now seen corresponding path program 83 times [2021-05-03 14:30:02,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:02,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515410246] [2021-05-03 14:30:02,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:02,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:02,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:02,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515410246] [2021-05-03 14:30:02,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375527267] [2021-05-03 14:30:02,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:02,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:30:02,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:02,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:02,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:02,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:02,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:02,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:30:02,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879957694] [2021-05-03 14:30:02,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:30:02,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:02,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:30:02,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:02,378 INFO L87 Difference]: Start difference. First operand 122 states and 257 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:02,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:02,611 INFO L93 Difference]: Finished difference Result 135 states and 283 transitions. [2021-05-03 14:30:02,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:30:02,611 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:02,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:02,612 INFO L225 Difference]: With dead ends: 135 [2021-05-03 14:30:02,612 INFO L226 Difference]: Without dead ends: 135 [2021-05-03 14:30:02,612 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 334.9ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:30:02,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-03 14:30:02,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 122. [2021-05-03 14:30:02,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.12396694214876) internal successors, (257), 121 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:02,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 257 transitions. [2021-05-03 14:30:02,615 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 257 transitions. Word has length 17 [2021-05-03 14:30:02,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:02,615 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 257 transitions. [2021-05-03 14:30:02,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:02,615 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 257 transitions. [2021-05-03 14:30:02,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:02,615 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:02,615 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:02,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-05-03 14:30:02,837 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:02,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:02,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1182491900, now seen corresponding path program 84 times [2021-05-03 14:30:02,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:02,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687913994] [2021-05-03 14:30:02,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:02,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:02,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687913994] [2021-05-03 14:30:02,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747581586] [2021-05-03 14:30:02,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:02,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:30:02,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:02,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:02,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:03,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:03,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:03,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:30:03,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149459929] [2021-05-03 14:30:03,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:30:03,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:03,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:30:03,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:03,164 INFO L87 Difference]: Start difference. First operand 122 states and 257 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:03,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:03,498 INFO L93 Difference]: Finished difference Result 144 states and 301 transitions. [2021-05-03 14:30:03,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:30:03,498 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:03,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:03,499 INFO L225 Difference]: With dead ends: 144 [2021-05-03 14:30:03,499 INFO L226 Difference]: Without dead ends: 144 [2021-05-03 14:30:03,499 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 436.7ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:30:03,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-03 14:30:03,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 122. [2021-05-03 14:30:03,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.12396694214876) internal successors, (257), 121 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 257 transitions. [2021-05-03 14:30:03,502 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 257 transitions. Word has length 17 [2021-05-03 14:30:03,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:03,502 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 257 transitions. [2021-05-03 14:30:03,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:03,502 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 257 transitions. [2021-05-03 14:30:03,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:03,502 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:03,502 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:03,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable544 [2021-05-03 14:30:03,725 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:03,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:03,725 INFO L82 PathProgramCache]: Analyzing trace with hash 741639945, now seen corresponding path program 85 times [2021-05-03 14:30:03,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:03,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366606907] [2021-05-03 14:30:03,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:03,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366606907] [2021-05-03 14:30:03,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767913357] [2021-05-03 14:30:03,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:03,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:03,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:04,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:04,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:04,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:30:04,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870430465] [2021-05-03 14:30:04,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:30:04,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:04,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:30:04,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:04,085 INFO L87 Difference]: Start difference. First operand 122 states and 257 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:04,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:04,340 INFO L93 Difference]: Finished difference Result 139 states and 291 transitions. [2021-05-03 14:30:04,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:30:04,340 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:04,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:04,341 INFO L225 Difference]: With dead ends: 139 [2021-05-03 14:30:04,341 INFO L226 Difference]: Without dead ends: 139 [2021-05-03 14:30:04,341 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 411.1ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:30:04,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-03 14:30:04,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 120. [2021-05-03 14:30:04,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1260504201680672) internal successors, (253), 119 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:04,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 253 transitions. [2021-05-03 14:30:04,343 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 253 transitions. Word has length 17 [2021-05-03 14:30:04,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:04,343 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 253 transitions. [2021-05-03 14:30:04,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:04,343 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 253 transitions. [2021-05-03 14:30:04,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:04,343 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:04,343 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:04,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:04,544 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:04,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:04,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1629340458, now seen corresponding path program 86 times [2021-05-03 14:30:04,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:04,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059216761] [2021-05-03 14:30:04,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:04,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059216761] [2021-05-03 14:30:04,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024807677] [2021-05-03 14:30:04,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:04,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:30:04,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:04,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:04,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:04,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:04,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:04,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167221171] [2021-05-03 14:30:04,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:04,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:04,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:04,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:04,827 INFO L87 Difference]: Start difference. First operand 120 states and 253 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:04,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:04,984 INFO L93 Difference]: Finished difference Result 138 states and 289 transitions. [2021-05-03 14:30:04,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:30:04,984 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:04,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:04,985 INFO L225 Difference]: With dead ends: 138 [2021-05-03 14:30:04,985 INFO L226 Difference]: Without dead ends: 138 [2021-05-03 14:30:04,985 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 241.3ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:04,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-03 14:30:04,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 120. [2021-05-03 14:30:04,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1260504201680672) internal successors, (253), 119 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:04,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 253 transitions. [2021-05-03 14:30:04,988 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 253 transitions. Word has length 17 [2021-05-03 14:30:04,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:04,988 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 253 transitions. [2021-05-03 14:30:04,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:04,988 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 253 transitions. [2021-05-03 14:30:04,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:04,989 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:04,989 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:05,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-05-03 14:30:05,209 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:05,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:05,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1868891086, now seen corresponding path program 87 times [2021-05-03 14:30:05,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:05,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209660147] [2021-05-03 14:30:05,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:05,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209660147] [2021-05-03 14:30:05,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710515589] [2021-05-03 14:30:05,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:05,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:30:05,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:05,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:30:05,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:05,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:05,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:05,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:30:05,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778390751] [2021-05-03 14:30:05,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:30:05,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:05,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:30:05,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:05,566 INFO L87 Difference]: Start difference. First operand 120 states and 253 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:05,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:05,923 INFO L93 Difference]: Finished difference Result 152 states and 312 transitions. [2021-05-03 14:30:05,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:30:05,923 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:05,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:05,924 INFO L225 Difference]: With dead ends: 152 [2021-05-03 14:30:05,924 INFO L226 Difference]: Without dead ends: 149 [2021-05-03 14:30:05,924 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 498.2ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:30:05,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-03 14:30:05,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 120. [2021-05-03 14:30:05,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1176470588235294) internal successors, (252), 119 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:05,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 252 transitions. [2021-05-03 14:30:05,926 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 252 transitions. Word has length 17 [2021-05-03 14:30:05,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:05,926 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 252 transitions. [2021-05-03 14:30:05,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:05,926 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 252 transitions. [2021-05-03 14:30:05,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:05,927 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:05,927 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:06,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-05-03 14:30:06,141 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:06,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:06,141 INFO L82 PathProgramCache]: Analyzing trace with hash -741494993, now seen corresponding path program 88 times [2021-05-03 14:30:06,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:06,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114576841] [2021-05-03 14:30:06,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:06,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114576841] [2021-05-03 14:30:06,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577021781] [2021-05-03 14:30:06,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:06,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:30:06,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:06,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:06,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:06,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:06,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:06,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839077040] [2021-05-03 14:30:06,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:06,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:06,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:06,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:06,523 INFO L87 Difference]: Start difference. First operand 120 states and 252 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:06,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:06,705 INFO L93 Difference]: Finished difference Result 138 states and 285 transitions. [2021-05-03 14:30:06,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:30:06,705 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:06,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:06,706 INFO L225 Difference]: With dead ends: 138 [2021-05-03 14:30:06,706 INFO L226 Difference]: Without dead ends: 136 [2021-05-03 14:30:06,706 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 394.7ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:30:06,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-03 14:30:06,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 118. [2021-05-03 14:30:06,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.111111111111111) internal successors, (247), 117 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:06,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 247 transitions. [2021-05-03 14:30:06,709 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 247 transitions. Word has length 17 [2021-05-03 14:30:06,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:06,709 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 247 transitions. [2021-05-03 14:30:06,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:06,709 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 247 transitions. [2021-05-03 14:30:06,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:06,709 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:06,709 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:06,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:06,917 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:06,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:06,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1362544820, now seen corresponding path program 89 times [2021-05-03 14:30:06,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:06,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949612661] [2021-05-03 14:30:06,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:06,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:07,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949612661] [2021-05-03 14:30:07,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913623512] [2021-05-03 14:30:07,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:07,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:30:07,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:07,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:07,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:07,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:07,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:07,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:07,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457948228] [2021-05-03 14:30:07,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:07,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:07,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:07,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:07,280 INFO L87 Difference]: Start difference. First operand 118 states and 247 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:07,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:07,520 INFO L93 Difference]: Finished difference Result 148 states and 300 transitions. [2021-05-03 14:30:07,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:30:07,520 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:07,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:07,521 INFO L225 Difference]: With dead ends: 148 [2021-05-03 14:30:07,521 INFO L226 Difference]: Without dead ends: 148 [2021-05-03 14:30:07,521 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 358.0ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:30:07,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-03 14:30:07,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 120. [2021-05-03 14:30:07,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1176470588235294) internal successors, (252), 119 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:07,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 252 transitions. [2021-05-03 14:30:07,523 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 252 transitions. Word has length 17 [2021-05-03 14:30:07,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:07,523 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 252 transitions. [2021-05-03 14:30:07,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:07,523 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 252 transitions. [2021-05-03 14:30:07,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:07,524 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:07,524 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:07,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:07,737 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:07,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:07,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1074994585, now seen corresponding path program 90 times [2021-05-03 14:30:07,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:07,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001570366] [2021-05-03 14:30:07,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:07,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:07,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001570366] [2021-05-03 14:30:07,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713858488] [2021-05-03 14:30:07,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:07,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:30:07,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:07,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:30:07,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:08,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:08,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:08,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024088403] [2021-05-03 14:30:08,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:08,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:08,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:08,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:08,067 INFO L87 Difference]: Start difference. First operand 120 states and 252 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:08,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:08,337 INFO L93 Difference]: Finished difference Result 181 states and 363 transitions. [2021-05-03 14:30:08,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:30:08,338 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:08,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:08,339 INFO L225 Difference]: With dead ends: 181 [2021-05-03 14:30:08,339 INFO L226 Difference]: Without dead ends: 181 [2021-05-03 14:30:08,339 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 341.3ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:30:08,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-03 14:30:08,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 121. [2021-05-03 14:30:08,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.1416666666666666) internal successors, (257), 120 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:08,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 257 transitions. [2021-05-03 14:30:08,342 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 257 transitions. Word has length 17 [2021-05-03 14:30:08,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:08,342 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 257 transitions. [2021-05-03 14:30:08,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:08,342 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 257 transitions. [2021-05-03 14:30:08,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:08,342 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:08,343 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:08,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:08,543 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:08,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:08,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1259937386, now seen corresponding path program 91 times [2021-05-03 14:30:08,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:08,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170587784] [2021-05-03 14:30:08,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:08,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170587784] [2021-05-03 14:30:08,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858869061] [2021-05-03 14:30:08,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:08,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:30:08,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:08,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:08,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:08,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466500911] [2021-05-03 14:30:08,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:08,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:08,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:08,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:08,875 INFO L87 Difference]: Start difference. First operand 121 states and 257 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:09,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:09,056 INFO L93 Difference]: Finished difference Result 135 states and 280 transitions. [2021-05-03 14:30:09,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:30:09,056 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:09,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:09,057 INFO L225 Difference]: With dead ends: 135 [2021-05-03 14:30:09,057 INFO L226 Difference]: Without dead ends: 129 [2021-05-03 14:30:09,057 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 318.0ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:30:09,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-03 14:30:09,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 121. [2021-05-03 14:30:09,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.1333333333333333) internal successors, (256), 120 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:09,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 256 transitions. [2021-05-03 14:30:09,059 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 256 transitions. Word has length 17 [2021-05-03 14:30:09,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:09,059 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 256 transitions. [2021-05-03 14:30:09,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:09,059 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 256 transitions. [2021-05-03 14:30:09,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:09,059 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:09,059 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:09,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-05-03 14:30:09,273 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:09,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:09,273 INFO L82 PathProgramCache]: Analyzing trace with hash -773004305, now seen corresponding path program 92 times [2021-05-03 14:30:09,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:09,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956815124] [2021-05-03 14:30:09,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:09,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956815124] [2021-05-03 14:30:09,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962992326] [2021-05-03 14:30:09,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:09,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:30:09,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:09,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:09,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:09,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:09,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:09,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:09,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911092314] [2021-05-03 14:30:09,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:09,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:09,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:09,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:09,652 INFO L87 Difference]: Start difference. First operand 121 states and 256 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:09,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:09,839 INFO L93 Difference]: Finished difference Result 143 states and 297 transitions. [2021-05-03 14:30:09,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:30:09,839 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:09,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:09,840 INFO L225 Difference]: With dead ends: 143 [2021-05-03 14:30:09,840 INFO L226 Difference]: Without dead ends: 143 [2021-05-03 14:30:09,840 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 337.4ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:30:09,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-03 14:30:09,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 118. [2021-05-03 14:30:09,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.111111111111111) internal successors, (247), 117 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:09,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 247 transitions. [2021-05-03 14:30:09,843 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 247 transitions. Word has length 17 [2021-05-03 14:30:09,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:09,843 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 247 transitions. [2021-05-03 14:30:09,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:09,843 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 247 transitions. [2021-05-03 14:30:09,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:09,843 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:09,843 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:10,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:10,044 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:10,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:10,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1398169660, now seen corresponding path program 93 times [2021-05-03 14:30:10,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:10,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872485528] [2021-05-03 14:30:10,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:10,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:10,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872485528] [2021-05-03 14:30:10,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790550884] [2021-05-03 14:30:10,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:10,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:30:10,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:10,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:30:10,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:10,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:10,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:10,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:10,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531570808] [2021-05-03 14:30:10,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:10,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:10,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:10,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:10,385 INFO L87 Difference]: Start difference. First operand 118 states and 247 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:10,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:10,515 INFO L93 Difference]: Finished difference Result 137 states and 285 transitions. [2021-05-03 14:30:10,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:30:10,516 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:10,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:10,516 INFO L225 Difference]: With dead ends: 137 [2021-05-03 14:30:10,516 INFO L226 Difference]: Without dead ends: 137 [2021-05-03 14:30:10,517 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 233.3ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:10,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-03 14:30:10,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 118. [2021-05-03 14:30:10,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.111111111111111) internal successors, (247), 117 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:10,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 247 transitions. [2021-05-03 14:30:10,518 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 247 transitions. Word has length 17 [2021-05-03 14:30:10,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:10,518 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 247 transitions. [2021-05-03 14:30:10,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:10,518 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 247 transitions. [2021-05-03 14:30:10,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:10,519 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:10,519 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:10,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-05-03 14:30:10,725 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:10,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:10,725 INFO L82 PathProgramCache]: Analyzing trace with hash -601433908, now seen corresponding path program 94 times [2021-05-03 14:30:10,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:10,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17820256] [2021-05-03 14:30:10,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:10,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17820256] [2021-05-03 14:30:10,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251241182] [2021-05-03 14:30:10,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:10,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:30:10,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:10,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:10,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:10,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:10,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:10,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:10,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024365377] [2021-05-03 14:30:10,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:10,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:10,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:10,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:10,998 INFO L87 Difference]: Start difference. First operand 118 states and 247 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:11,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:11,158 INFO L93 Difference]: Finished difference Result 150 states and 307 transitions. [2021-05-03 14:30:11,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:30:11,159 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:11,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:11,159 INFO L225 Difference]: With dead ends: 150 [2021-05-03 14:30:11,159 INFO L226 Difference]: Without dead ends: 147 [2021-05-03 14:30:11,160 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 211.0ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:11,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-03 14:30:11,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2021-05-03 14:30:11,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1025641025641026) internal successors, (246), 117 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:11,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 246 transitions. [2021-05-03 14:30:11,162 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 246 transitions. Word has length 17 [2021-05-03 14:30:11,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:11,162 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 246 transitions. [2021-05-03 14:30:11,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:11,162 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 246 transitions. [2021-05-03 14:30:11,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:11,162 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:11,162 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:11,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:11,373 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:11,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:11,373 INFO L82 PathProgramCache]: Analyzing trace with hash 525962185, now seen corresponding path program 95 times [2021-05-03 14:30:11,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:11,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187521921] [2021-05-03 14:30:11,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:11,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:11,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187521921] [2021-05-03 14:30:11,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553382932] [2021-05-03 14:30:11,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:11,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:30:11,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:11,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:11,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:11,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:11,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:11,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494133100] [2021-05-03 14:30:11,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:11,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:11,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:11,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:11,767 INFO L87 Difference]: Start difference. First operand 118 states and 246 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:11,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:11,900 INFO L93 Difference]: Finished difference Result 128 states and 265 transitions. [2021-05-03 14:30:11,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:30:11,901 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:11,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:11,901 INFO L225 Difference]: With dead ends: 128 [2021-05-03 14:30:11,901 INFO L226 Difference]: Without dead ends: 128 [2021-05-03 14:30:11,902 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 294.3ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:11,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-03 14:30:11,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 113. [2021-05-03 14:30:11,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0982142857142856) internal successors, (235), 112 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:11,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 235 transitions. [2021-05-03 14:30:11,904 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 235 transitions. Word has length 17 [2021-05-03 14:30:11,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:11,904 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 235 transitions. [2021-05-03 14:30:11,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:11,904 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 235 transitions. [2021-05-03 14:30:11,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:11,904 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:11,905 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:12,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:12,113 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:12,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:12,113 INFO L82 PathProgramCache]: Analyzing trace with hash -95087642, now seen corresponding path program 96 times [2021-05-03 14:30:12,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:12,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293076587] [2021-05-03 14:30:12,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:12,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293076587] [2021-05-03 14:30:12,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395421236] [2021-05-03 14:30:12,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:12,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:30:12,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:12,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:12,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:12,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:12,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:12,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452766309] [2021-05-03 14:30:12,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:12,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:12,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:12,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:12,459 INFO L87 Difference]: Start difference. First operand 113 states and 235 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:12,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:12,826 INFO L93 Difference]: Finished difference Result 151 states and 311 transitions. [2021-05-03 14:30:12,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:30:12,827 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:12,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:12,827 INFO L225 Difference]: With dead ends: 151 [2021-05-03 14:30:12,827 INFO L226 Difference]: Without dead ends: 151 [2021-05-03 14:30:12,828 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 451.6ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:30:12,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-03 14:30:12,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2021-05-03 14:30:12,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.0973451327433628) internal successors, (237), 113 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:12,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 237 transitions. [2021-05-03 14:30:12,829 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 237 transitions. Word has length 17 [2021-05-03 14:30:12,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:12,830 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 237 transitions. [2021-05-03 14:30:12,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:12,830 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 237 transitions. [2021-05-03 14:30:12,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:12,830 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:12,830 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:13,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable600 [2021-05-03 14:30:13,031 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:13,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:13,031 INFO L82 PathProgramCache]: Analyzing trace with hash 192462593, now seen corresponding path program 97 times [2021-05-03 14:30:13,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:13,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623408530] [2021-05-03 14:30:13,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:13,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:13,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623408530] [2021-05-03 14:30:13,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312091649] [2021-05-03 14:30:13,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:13,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:13,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:13,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:13,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:13,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526159578] [2021-05-03 14:30:13,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:13,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:13,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:13,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:13,326 INFO L87 Difference]: Start difference. First operand 114 states and 237 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:13,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:13,642 INFO L93 Difference]: Finished difference Result 159 states and 323 transitions. [2021-05-03 14:30:13,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:30:13,643 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:13,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:13,643 INFO L225 Difference]: With dead ends: 159 [2021-05-03 14:30:13,643 INFO L226 Difference]: Without dead ends: 159 [2021-05-03 14:30:13,643 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 395.9ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:30:13,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-03 14:30:13,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 117. [2021-05-03 14:30:13,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1120689655172415) internal successors, (245), 116 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:13,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 245 transitions. [2021-05-03 14:30:13,645 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 245 transitions. Word has length 17 [2021-05-03 14:30:13,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:13,645 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 245 transitions. [2021-05-03 14:30:13,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:13,645 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 245 transitions. [2021-05-03 14:30:13,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:13,645 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:13,645 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:13,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:13,846 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:13,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:13,846 INFO L82 PathProgramCache]: Analyzing trace with hash 494452873, now seen corresponding path program 98 times [2021-05-03 14:30:13,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:13,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646164684] [2021-05-03 14:30:13,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:13,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646164684] [2021-05-03 14:30:13,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865480421] [2021-05-03 14:30:13,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:13,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:30:13,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:13,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:13,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:14,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:14,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:14,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242945167] [2021-05-03 14:30:14,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:14,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:14,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:14,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:14,136 INFO L87 Difference]: Start difference. First operand 117 states and 245 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:14,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:14,282 INFO L93 Difference]: Finished difference Result 138 states and 285 transitions. [2021-05-03 14:30:14,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:30:14,283 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:14,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:14,283 INFO L225 Difference]: With dead ends: 138 [2021-05-03 14:30:14,283 INFO L226 Difference]: Without dead ends: 138 [2021-05-03 14:30:14,283 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 269.8ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:30:14,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-03 14:30:14,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 111. [2021-05-03 14:30:14,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:14,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-05-03 14:30:14,285 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 17 [2021-05-03 14:30:14,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:14,285 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-05-03 14:30:14,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:14,285 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-05-03 14:30:14,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:14,285 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:14,285 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:14,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable611,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:14,492 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:14,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:14,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1578222580, now seen corresponding path program 99 times [2021-05-03 14:30:14,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:14,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538343638] [2021-05-03 14:30:14,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:14,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:14,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538343638] [2021-05-03 14:30:14,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365022216] [2021-05-03 14:30:14,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:14,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:30:14,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:14,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:30:14,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:14,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:14,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:14,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:30:14,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815989943] [2021-05-03 14:30:14,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:30:14,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:14,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:30:14,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:14,919 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:15,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:15,406 INFO L93 Difference]: Finished difference Result 132 states and 269 transitions. [2021-05-03 14:30:15,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:30:15,406 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:15,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:15,407 INFO L225 Difference]: With dead ends: 132 [2021-05-03 14:30:15,407 INFO L226 Difference]: Without dead ends: 126 [2021-05-03 14:30:15,407 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 639.6ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:30:15,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-03 14:30:15,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 113. [2021-05-03 14:30:15,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0982142857142856) internal successors, (235), 112 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:15,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 235 transitions. [2021-05-03 14:30:15,409 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 235 transitions. Word has length 17 [2021-05-03 14:30:15,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:15,409 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 235 transitions. [2021-05-03 14:30:15,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:15,409 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 235 transitions. [2021-05-03 14:30:15,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:15,409 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:15,409 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:15,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable614 [2021-05-03 14:30:15,610 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:15,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:15,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1290672345, now seen corresponding path program 100 times [2021-05-03 14:30:15,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:15,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766926143] [2021-05-03 14:30:15,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:15,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:15,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766926143] [2021-05-03 14:30:15,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943584708] [2021-05-03 14:30:15,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:15,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:30:15,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:15,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:15,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:15,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:15,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:30:15,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952762894] [2021-05-03 14:30:15,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:30:15,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:15,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:30:15,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:15,910 INFO L87 Difference]: Start difference. First operand 113 states and 235 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:16,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:16,432 INFO L93 Difference]: Finished difference Result 156 states and 317 transitions. [2021-05-03 14:30:16,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:30:16,433 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:16,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:16,433 INFO L225 Difference]: With dead ends: 156 [2021-05-03 14:30:16,433 INFO L226 Difference]: Without dead ends: 156 [2021-05-03 14:30:16,433 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 563.8ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:30:16,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-03 14:30:16,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 117. [2021-05-03 14:30:16,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1206896551724137) internal successors, (246), 116 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:16,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 246 transitions. [2021-05-03 14:30:16,436 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 246 transitions. Word has length 17 [2021-05-03 14:30:16,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:16,436 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 246 transitions. [2021-05-03 14:30:16,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:16,436 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 246 transitions. [2021-05-03 14:30:16,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:16,437 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:16,437 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:16,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable620 [2021-05-03 14:30:16,645 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:16,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:16,645 INFO L82 PathProgramCache]: Analyzing trace with hash -988682065, now seen corresponding path program 101 times [2021-05-03 14:30:16,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:16,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408632165] [2021-05-03 14:30:16,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:16,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408632165] [2021-05-03 14:30:16,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942328559] [2021-05-03 14:30:16,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:16,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:30:16,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:16,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:30:16,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:16,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:16,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:16,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:30:16,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889473075] [2021-05-03 14:30:16,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:30:16,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:16,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:30:16,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:16,925 INFO L87 Difference]: Start difference. First operand 117 states and 246 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:17,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:17,364 INFO L93 Difference]: Finished difference Result 144 states and 298 transitions. [2021-05-03 14:30:17,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:30:17,365 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:17,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:17,365 INFO L225 Difference]: With dead ends: 144 [2021-05-03 14:30:17,365 INFO L226 Difference]: Without dead ends: 144 [2021-05-03 14:30:17,366 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 535.5ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:30:17,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-03 14:30:17,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 116. [2021-05-03 14:30:17,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.121739130434783) internal successors, (244), 115 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:17,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 244 transitions. [2021-05-03 14:30:17,368 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 244 transitions. Word has length 17 [2021-05-03 14:30:17,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:17,368 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 244 transitions. [2021-05-03 14:30:17,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:17,368 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 244 transitions. [2021-05-03 14:30:17,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:17,368 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:17,369 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:17,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable625 [2021-05-03 14:30:17,573 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:17,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:17,573 INFO L82 PathProgramCache]: Analyzing trace with hash -482335799, now seen corresponding path program 102 times [2021-05-03 14:30:17,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:17,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806676024] [2021-05-03 14:30:17,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:17,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806676024] [2021-05-03 14:30:17,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752974645] [2021-05-03 14:30:17,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:17,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:30:17,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:17,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:17,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:17,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:17,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:17,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:30:17,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331320663] [2021-05-03 14:30:17,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:30:17,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:17,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:30:17,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:17,833 INFO L87 Difference]: Start difference. First operand 116 states and 244 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:18,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:18,075 INFO L93 Difference]: Finished difference Result 136 states and 281 transitions. [2021-05-03 14:30:18,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:30:18,076 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:18,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:18,076 INFO L225 Difference]: With dead ends: 136 [2021-05-03 14:30:18,076 INFO L226 Difference]: Without dead ends: 136 [2021-05-03 14:30:18,076 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 321.2ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:30:18,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-03 14:30:18,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 112. [2021-05-03 14:30:18,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:18,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-05-03 14:30:18,079 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 17 [2021-05-03 14:30:18,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:18,079 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-05-03 14:30:18,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:18,079 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-05-03 14:30:18,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:18,079 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:18,079 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:18,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable628,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:18,289 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:18,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:18,289 INFO L82 PathProgramCache]: Analyzing trace with hash 425996420, now seen corresponding path program 103 times [2021-05-03 14:30:18,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:18,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437970372] [2021-05-03 14:30:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:18,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437970372] [2021-05-03 14:30:18,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080050970] [2021-05-03 14:30:18,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:18,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:30:18,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:18,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:18,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:30:18,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814733439] [2021-05-03 14:30:18,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:30:18,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:18,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:30:18,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:18,558 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:18,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:18,817 INFO L93 Difference]: Finished difference Result 126 states and 261 transitions. [2021-05-03 14:30:18,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:30:18,818 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:18,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:18,818 INFO L225 Difference]: With dead ends: 126 [2021-05-03 14:30:18,818 INFO L226 Difference]: Without dead ends: 126 [2021-05-03 14:30:18,818 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 353.6ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:30:18,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-03 14:30:18,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2021-05-03 14:30:18,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:18,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-05-03 14:30:18,821 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 17 [2021-05-03 14:30:18,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:18,821 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-05-03 14:30:18,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:18,821 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-05-03 14:30:18,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:18,821 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:18,821 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:19,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-05-03 14:30:19,033 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:19,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:19,033 INFO L82 PathProgramCache]: Analyzing trace with hash -644999044, now seen corresponding path program 104 times [2021-05-03 14:30:19,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:19,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246960671] [2021-05-03 14:30:19,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:19,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246960671] [2021-05-03 14:30:19,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093898096] [2021-05-03 14:30:19,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:19,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:30:19,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:19,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:19,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:19,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:19,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:19,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:30:19,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037410038] [2021-05-03 14:30:19,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:30:19,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:19,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:30:19,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:19,326 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:19,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:19,753 INFO L93 Difference]: Finished difference Result 132 states and 273 transitions. [2021-05-03 14:30:19,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:30:19,754 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:19,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:19,754 INFO L225 Difference]: With dead ends: 132 [2021-05-03 14:30:19,754 INFO L226 Difference]: Without dead ends: 132 [2021-05-03 14:30:19,754 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 523.9ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:30:19,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-03 14:30:19,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 112. [2021-05-03 14:30:19,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:19,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-05-03 14:30:19,756 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 17 [2021-05-03 14:30:19,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:19,756 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-05-03 14:30:19,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:19,756 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-05-03 14:30:19,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:19,757 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:19,757 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:19,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable632 [2021-05-03 14:30:19,961 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:19,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:19,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1521883201, now seen corresponding path program 105 times [2021-05-03 14:30:19,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:19,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894834809] [2021-05-03 14:30:19,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:20,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:20,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894834809] [2021-05-03 14:30:20,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683747736] [2021-05-03 14:30:20,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:20,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:30:20,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:20,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:20,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:20,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:20,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:30:20,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246354502] [2021-05-03 14:30:20,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:30:20,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:20,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:30:20,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:20,290 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:20,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:20,625 INFO L93 Difference]: Finished difference Result 149 states and 291 transitions. [2021-05-03 14:30:20,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:30:20,625 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:20,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:20,626 INFO L225 Difference]: With dead ends: 149 [2021-05-03 14:30:20,626 INFO L226 Difference]: Without dead ends: 145 [2021-05-03 14:30:20,626 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 479.3ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:30:20,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-03 14:30:20,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 117. [2021-05-03 14:30:20,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1120689655172415) internal successors, (245), 116 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:20,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 245 transitions. [2021-05-03 14:30:20,628 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 245 transitions. Word has length 17 [2021-05-03 14:30:20,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:20,628 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 245 transitions. [2021-05-03 14:30:20,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:20,629 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 245 transitions. [2021-05-03 14:30:20,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:20,629 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:20,629 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:20,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2021-05-03 14:30:20,833 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:20,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:20,833 INFO L82 PathProgramCache]: Analyzing trace with hash -688109150, now seen corresponding path program 106 times [2021-05-03 14:30:20,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:20,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660881363] [2021-05-03 14:30:20,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:20,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660881363] [2021-05-03 14:30:20,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707919572] [2021-05-03 14:30:20,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:20,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:30:20,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:20,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:30:20,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:21,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:21,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:21,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:30:21,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108925080] [2021-05-03 14:30:21,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:30:21,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:21,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:30:21,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:21,101 INFO L87 Difference]: Start difference. First operand 117 states and 245 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:21,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:21,567 INFO L93 Difference]: Finished difference Result 136 states and 284 transitions. [2021-05-03 14:30:21,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:30:21,567 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:21,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:21,568 INFO L225 Difference]: With dead ends: 136 [2021-05-03 14:30:21,568 INFO L226 Difference]: Without dead ends: 136 [2021-05-03 14:30:21,568 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 507.0ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:30:21,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-03 14:30:21,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2021-05-03 14:30:21,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1120689655172415) internal successors, (245), 116 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:21,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 245 transitions. [2021-05-03 14:30:21,569 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 245 transitions. Word has length 17 [2021-05-03 14:30:21,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:21,569 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 245 transitions. [2021-05-03 14:30:21,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:21,570 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 245 transitions. [2021-05-03 14:30:21,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:21,570 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:21,570 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:21,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable640,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:21,770 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:21,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:21,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1279132801, now seen corresponding path program 107 times [2021-05-03 14:30:21,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:21,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176163226] [2021-05-03 14:30:21,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:21,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176163226] [2021-05-03 14:30:21,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56874136] [2021-05-03 14:30:21,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:21,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:30:21,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:21,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:30:21,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:22,078 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-03 14:30:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:22,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:22,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:30:22,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850693449] [2021-05-03 14:30:22,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:30:22,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:22,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:30:22,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:22,199 INFO L87 Difference]: Start difference. First operand 117 states and 245 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:22,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:22,498 INFO L93 Difference]: Finished difference Result 123 states and 254 transitions. [2021-05-03 14:30:22,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:30:22,499 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:22,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:22,499 INFO L225 Difference]: With dead ends: 123 [2021-05-03 14:30:22,499 INFO L226 Difference]: Without dead ends: 123 [2021-05-03 14:30:22,499 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 508.6ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:30:22,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-03 14:30:22,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 109. [2021-05-03 14:30:22,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.1018518518518516) internal successors, (227), 108 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:22,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 227 transitions. [2021-05-03 14:30:22,501 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 227 transitions. Word has length 17 [2021-05-03 14:30:22,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:22,501 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 227 transitions. [2021-05-03 14:30:22,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:22,502 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 227 transitions. [2021-05-03 14:30:22,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:22,502 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:22,502 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:22,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable645 [2021-05-03 14:30:22,709 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:22,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:22,709 INFO L82 PathProgramCache]: Analyzing trace with hash -2128133982, now seen corresponding path program 108 times [2021-05-03 14:30:22,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:22,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99055718] [2021-05-03 14:30:22,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:22,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:22,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99055718] [2021-05-03 14:30:22,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135762202] [2021-05-03 14:30:22,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:22,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:30:22,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:22,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:22,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:22,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:22,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:22,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387853181] [2021-05-03 14:30:22,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:22,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:22,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:22,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:22,995 INFO L87 Difference]: Start difference. First operand 109 states and 227 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:23,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:23,154 INFO L93 Difference]: Finished difference Result 123 states and 255 transitions. [2021-05-03 14:30:23,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:30:23,154 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:23,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:23,154 INFO L225 Difference]: With dead ends: 123 [2021-05-03 14:30:23,154 INFO L226 Difference]: Without dead ends: 123 [2021-05-03 14:30:23,155 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 267.7ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:30:23,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-03 14:30:23,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 109. [2021-05-03 14:30:23,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.1018518518518516) internal successors, (227), 108 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:23,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 227 transitions. [2021-05-03 14:30:23,156 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 227 transitions. Word has length 17 [2021-05-03 14:30:23,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:23,156 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 227 transitions. [2021-05-03 14:30:23,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:23,157 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 227 transitions. [2021-05-03 14:30:23,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:23,157 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:23,157 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:23,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable651,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:23,361 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:23,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:23,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1331398230, now seen corresponding path program 109 times [2021-05-03 14:30:23,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:23,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957076810] [2021-05-03 14:30:23,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:23,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957076810] [2021-05-03 14:30:23,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231006251] [2021-05-03 14:30:23,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:23,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:23,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:23,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:23,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:23,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677305066] [2021-05-03 14:30:23,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:23,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:23,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:23,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:23,740 INFO L87 Difference]: Start difference. First operand 109 states and 227 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:24,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:24,045 INFO L93 Difference]: Finished difference Result 132 states and 273 transitions. [2021-05-03 14:30:24,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:30:24,046 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:24,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:24,046 INFO L225 Difference]: With dead ends: 132 [2021-05-03 14:30:24,046 INFO L226 Difference]: Without dead ends: 132 [2021-05-03 14:30:24,046 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 440.6ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:30:24,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-03 14:30:24,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 109. [2021-05-03 14:30:24,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.1018518518518516) internal successors, (227), 108 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:24,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 227 transitions. [2021-05-03 14:30:24,048 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 227 transitions. Word has length 17 [2021-05-03 14:30:24,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:24,049 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 227 transitions. [2021-05-03 14:30:24,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:24,049 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 227 transitions. [2021-05-03 14:30:24,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:24,049 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:24,049 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:24,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable654 [2021-05-03 14:30:24,265 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:24,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:24,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1043847995, now seen corresponding path program 110 times [2021-05-03 14:30:24,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:24,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185914297] [2021-05-03 14:30:24,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:24,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185914297] [2021-05-03 14:30:24,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885002266] [2021-05-03 14:30:24,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:24,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:30:24,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:24,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:24,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:24,649 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 14:30:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:24,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:24,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:24,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004228901] [2021-05-03 14:30:24,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:24,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:24,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:24,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:24,705 INFO L87 Difference]: Start difference. First operand 109 states and 227 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:24,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:24,886 INFO L93 Difference]: Finished difference Result 121 states and 250 transitions. [2021-05-03 14:30:24,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:30:24,886 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:24,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:24,887 INFO L225 Difference]: With dead ends: 121 [2021-05-03 14:30:24,887 INFO L226 Difference]: Without dead ends: 121 [2021-05-03 14:30:24,887 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 423.4ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:30:24,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-03 14:30:24,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 106. [2021-05-03 14:30:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.085714285714286) internal successors, (219), 105 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:24,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 219 transitions. [2021-05-03 14:30:24,888 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 219 transitions. Word has length 17 [2021-05-03 14:30:24,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:24,888 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 219 transitions. [2021-05-03 14:30:24,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:24,888 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 219 transitions. [2021-05-03 14:30:24,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:24,888 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:24,888 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:25,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable659,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:25,093 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:25,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:25,093 INFO L82 PathProgramCache]: Analyzing trace with hash -825051964, now seen corresponding path program 111 times [2021-05-03 14:30:25,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:25,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471684797] [2021-05-03 14:30:25,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:25,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471684797] [2021-05-03 14:30:25,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960507880] [2021-05-03 14:30:25,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:25,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:30:25,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:25,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:30:25,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:25,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:25,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:30:25,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147561322] [2021-05-03 14:30:25,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:30:25,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:25,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:30:25,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:25,465 INFO L87 Difference]: Start difference. First operand 106 states and 219 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:25,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:25,699 INFO L93 Difference]: Finished difference Result 121 states and 244 transitions. [2021-05-03 14:30:25,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:30:25,699 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:25,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:25,700 INFO L225 Difference]: With dead ends: 121 [2021-05-03 14:30:25,700 INFO L226 Difference]: Without dead ends: 115 [2021-05-03 14:30:25,700 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 346.1ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:30:25,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-03 14:30:25,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2021-05-03 14:30:25,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0761904761904764) internal successors, (218), 105 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:25,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 218 transitions. [2021-05-03 14:30:25,702 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 218 transitions. Word has length 17 [2021-05-03 14:30:25,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:25,702 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 218 transitions. [2021-05-03 14:30:25,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:25,702 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 218 transitions. [2021-05-03 14:30:25,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:25,702 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:25,702 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:25,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable665 [2021-05-03 14:30:25,917 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:25,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:25,917 INFO L82 PathProgramCache]: Analyzing trace with hash -537501729, now seen corresponding path program 112 times [2021-05-03 14:30:25,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:25,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710588166] [2021-05-03 14:30:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:26,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710588166] [2021-05-03 14:30:26,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374247740] [2021-05-03 14:30:26,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:26,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:30:26,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:26,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:26,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:26,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:26,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:26,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133361610] [2021-05-03 14:30:26,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:26,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:26,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:26,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:26,260 INFO L87 Difference]: Start difference. First operand 106 states and 218 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:26,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:26,546 INFO L93 Difference]: Finished difference Result 152 states and 299 transitions. [2021-05-03 14:30:26,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:30:26,546 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:26,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:26,547 INFO L225 Difference]: With dead ends: 152 [2021-05-03 14:30:26,547 INFO L226 Difference]: Without dead ends: 152 [2021-05-03 14:30:26,547 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 330.7ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:30:26,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-03 14:30:26,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 106. [2021-05-03 14:30:26,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.085714285714286) internal successors, (219), 105 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:26,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 219 transitions. [2021-05-03 14:30:26,549 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 219 transitions. Word has length 17 [2021-05-03 14:30:26,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:26,549 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 219 transitions. [2021-05-03 14:30:26,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:26,549 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 219 transitions. [2021-05-03 14:30:26,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:26,549 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:26,549 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:26,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:26,750 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:26,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:26,750 INFO L82 PathProgramCache]: Analyzing trace with hash -235511449, now seen corresponding path program 113 times [2021-05-03 14:30:26,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:26,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823812567] [2021-05-03 14:30:26,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:26,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823812567] [2021-05-03 14:30:26,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613732939] [2021-05-03 14:30:26,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:26,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:30:26,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:26,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:26,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:27,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:27,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:27,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:27,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368072248] [2021-05-03 14:30:27,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:27,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:27,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:27,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:27,071 INFO L87 Difference]: Start difference. First operand 106 states and 219 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:27,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:27,201 INFO L93 Difference]: Finished difference Result 120 states and 244 transitions. [2021-05-03 14:30:27,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:30:27,202 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:27,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:27,202 INFO L225 Difference]: With dead ends: 120 [2021-05-03 14:30:27,202 INFO L226 Difference]: Without dead ends: 120 [2021-05-03 14:30:27,203 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 237.7ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:27,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-03 14:30:27,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2021-05-03 14:30:27,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0594059405940595) internal successors, (208), 101 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:27,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 208 transitions. [2021-05-03 14:30:27,204 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 208 transitions. Word has length 17 [2021-05-03 14:30:27,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:27,204 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 208 transitions. [2021-05-03 14:30:27,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:27,204 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 208 transitions. [2021-05-03 14:30:27,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:27,204 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:27,204 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:27,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable674 [2021-05-03 14:30:27,405 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:27,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:27,405 INFO L82 PathProgramCache]: Analyzing trace with hash -860676804, now seen corresponding path program 114 times [2021-05-03 14:30:27,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:27,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936181189] [2021-05-03 14:30:27,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:27,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936181189] [2021-05-03 14:30:27,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989094849] [2021-05-03 14:30:27,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:27,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:30:27,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:27,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:30:27,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:27,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:27,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:27,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859779342] [2021-05-03 14:30:27,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:27,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:27,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:27,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:27,716 INFO L87 Difference]: Start difference. First operand 102 states and 208 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:27,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:27,889 INFO L93 Difference]: Finished difference Result 119 states and 242 transitions. [2021-05-03 14:30:27,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:30:27,890 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:27,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:27,890 INFO L225 Difference]: With dead ends: 119 [2021-05-03 14:30:27,890 INFO L226 Difference]: Without dead ends: 119 [2021-05-03 14:30:27,890 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 273.2ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:30:27,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-03 14:30:27,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 103. [2021-05-03 14:30:27,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 102 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:27,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 211 transitions. [2021-05-03 14:30:27,892 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 211 transitions. Word has length 17 [2021-05-03 14:30:27,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:27,893 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 211 transitions. [2021-05-03 14:30:27,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:27,893 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 211 transitions. [2021-05-03 14:30:27,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:27,893 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:27,893 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:28,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable677,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:28,119 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:28,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:28,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1306205441, now seen corresponding path program 115 times [2021-05-03 14:30:28,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:28,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125526320] [2021-05-03 14:30:28,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:28,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:28,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125526320] [2021-05-03 14:30:28,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732386432] [2021-05-03 14:30:28,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:28,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:30:28,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:28,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:28,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:28,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:28,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226594119] [2021-05-03 14:30:28,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:28,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:28,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:28,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:28,496 INFO L87 Difference]: Start difference. First operand 103 states and 211 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:28,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:28,680 INFO L93 Difference]: Finished difference Result 140 states and 269 transitions. [2021-05-03 14:30:28,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:30:28,681 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:28,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:28,681 INFO L225 Difference]: With dead ends: 140 [2021-05-03 14:30:28,681 INFO L226 Difference]: Without dead ends: 136 [2021-05-03 14:30:28,681 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 365.7ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:30:28,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-03 14:30:28,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 109. [2021-05-03 14:30:28,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:28,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-05-03 14:30:28,683 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 17 [2021-05-03 14:30:28,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:28,683 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-05-03 14:30:28,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:28,683 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-05-03 14:30:28,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:28,683 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:28,683 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:28,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:28,884 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:28,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:28,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1063455041, now seen corresponding path program 116 times [2021-05-03 14:30:28,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:28,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87036968] [2021-05-03 14:30:28,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:28,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:28,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87036968] [2021-05-03 14:30:28,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79613005] [2021-05-03 14:30:28,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:29,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:30:29,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:29,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:30:29,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:29,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:29,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:29,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:29,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059033768] [2021-05-03 14:30:29,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:29,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:29,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:29,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:29,329 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:29,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:29,452 INFO L93 Difference]: Finished difference Result 118 states and 240 transitions. [2021-05-03 14:30:29,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:30:29,453 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:29,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:29,453 INFO L225 Difference]: With dead ends: 118 [2021-05-03 14:30:29,453 INFO L226 Difference]: Without dead ends: 118 [2021-05-03 14:30:29,453 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 369.9ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:29,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-03 14:30:29,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 102. [2021-05-03 14:30:29,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0594059405940595) internal successors, (208), 101 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:29,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 208 transitions. [2021-05-03 14:30:29,455 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 208 transitions. Word has length 17 [2021-05-03 14:30:29,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:29,455 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 208 transitions. [2021-05-03 14:30:29,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:29,455 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 208 transitions. [2021-05-03 14:30:29,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:29,455 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:29,455 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:29,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable685 [2021-05-03 14:30:29,656 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:29,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:29,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1569801307, now seen corresponding path program 117 times [2021-05-03 14:30:29,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:29,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750319016] [2021-05-03 14:30:29,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:29,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:29,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750319016] [2021-05-03 14:30:29,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764990132] [2021-05-03 14:30:29,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:29,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:30:29,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:29,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:30:29,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:29,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:29,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:29,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:29,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406059365] [2021-05-03 14:30:29,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:29,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:29,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:29,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:29,958 INFO L87 Difference]: Start difference. First operand 102 states and 208 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:30,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:30,233 INFO L93 Difference]: Finished difference Result 137 states and 273 transitions. [2021-05-03 14:30:30,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:30:30,234 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:30,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:30,234 INFO L225 Difference]: With dead ends: 137 [2021-05-03 14:30:30,234 INFO L226 Difference]: Without dead ends: 137 [2021-05-03 14:30:30,234 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 371.5ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:30:30,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-03 14:30:30,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 106. [2021-05-03 14:30:30,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0761904761904764) internal successors, (218), 105 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:30,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 218 transitions. [2021-05-03 14:30:30,236 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 218 transitions. Word has length 17 [2021-05-03 14:30:30,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:30,236 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 218 transitions. [2021-05-03 14:30:30,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:30,237 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 218 transitions. [2021-05-03 14:30:30,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:30,237 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:30,237 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:30,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable689,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:30,441 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:30,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:30,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1031945729, now seen corresponding path program 118 times [2021-05-03 14:30:30,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:30,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758318320] [2021-05-03 14:30:30,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:30,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:30,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758318320] [2021-05-03 14:30:30,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385759876] [2021-05-03 14:30:30,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:30,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:30:30,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:30,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:30,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:30,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:30,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:30,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984338792] [2021-05-03 14:30:30,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:30,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:30,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:30,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:30,737 INFO L87 Difference]: Start difference. First operand 106 states and 218 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:30,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:30,899 INFO L93 Difference]: Finished difference Result 118 states and 240 transitions. [2021-05-03 14:30:30,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:30:30,899 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:30,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:30,900 INFO L225 Difference]: With dead ends: 118 [2021-05-03 14:30:30,900 INFO L226 Difference]: Without dead ends: 118 [2021-05-03 14:30:30,900 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 257.0ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:30,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-03 14:30:30,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 102. [2021-05-03 14:30:30,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0594059405940595) internal successors, (208), 101 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:30,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 208 transitions. [2021-05-03 14:30:30,901 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 208 transitions. Word has length 17 [2021-05-03 14:30:30,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:30,901 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 208 transitions. [2021-05-03 14:30:30,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:30,902 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 208 transitions. [2021-05-03 14:30:30,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:30,902 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:30,902 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:31,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-05-03 14:30:31,102 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:31,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:31,103 INFO L82 PathProgramCache]: Analyzing trace with hash 86666369, now seen corresponding path program 119 times [2021-05-03 14:30:31,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:31,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595713551] [2021-05-03 14:30:31,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:31,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595713551] [2021-05-03 14:30:31,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011935352] [2021-05-03 14:30:31,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:31,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:30:31,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:31,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:30:31,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:31,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:31,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:31,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:30:31,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593086000] [2021-05-03 14:30:31,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:30:31,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:31,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:30:31,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:31,404 INFO L87 Difference]: Start difference. First operand 102 states and 208 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:31,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:31,917 INFO L93 Difference]: Finished difference Result 137 states and 273 transitions. [2021-05-03 14:30:31,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:30:31,918 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:31,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:31,919 INFO L225 Difference]: With dead ends: 137 [2021-05-03 14:30:31,919 INFO L226 Difference]: Without dead ends: 137 [2021-05-03 14:30:31,919 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 602.5ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:30:31,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-03 14:30:31,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 107. [2021-05-03 14:30:31,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 106 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:31,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-05-03 14:30:31,921 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 17 [2021-05-03 14:30:31,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:31,921 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-05-03 14:30:31,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:31,921 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-05-03 14:30:31,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:31,921 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:31,921 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:32,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-05-03 14:30:32,129 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:32,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:32,129 INFO L82 PathProgramCache]: Analyzing trace with hash -451189209, now seen corresponding path program 120 times [2021-05-03 14:30:32,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:32,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225433633] [2021-05-03 14:30:32,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:32,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:32,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:32,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225433633] [2021-05-03 14:30:32,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936096612] [2021-05-03 14:30:32,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:32,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:30:32,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:32,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:32,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:32,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:32,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:30:32,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81041560] [2021-05-03 14:30:32,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:30:32,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:32,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:30:32,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:32,420 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:32,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:32,821 INFO L93 Difference]: Finished difference Result 129 states and 263 transitions. [2021-05-03 14:30:32,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:30:32,822 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:32,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:32,822 INFO L225 Difference]: With dead ends: 129 [2021-05-03 14:30:32,822 INFO L226 Difference]: Without dead ends: 129 [2021-05-03 14:30:32,822 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 484.7ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:30:32,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-03 14:30:32,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 107. [2021-05-03 14:30:32,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 106 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:32,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-05-03 14:30:32,824 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 17 [2021-05-03 14:30:32,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:32,824 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-05-03 14:30:32,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:32,824 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-05-03 14:30:32,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:32,825 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:32,825 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:33,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable701,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:33,037 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:33,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:33,037 INFO L82 PathProgramCache]: Analyzing trace with hash 55157057, now seen corresponding path program 121 times [2021-05-03 14:30:33,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:33,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932706971] [2021-05-03 14:30:33,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:33,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932706971] [2021-05-03 14:30:33,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362506845] [2021-05-03 14:30:33,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:33,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:33,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:30:33,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:33,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:33,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:33,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:30:33,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750831567] [2021-05-03 14:30:33,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:30:33,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:33,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:30:33,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:33,334 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:33,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:33,669 INFO L93 Difference]: Finished difference Result 126 states and 256 transitions. [2021-05-03 14:30:33,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:30:33,670 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:33,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:33,670 INFO L225 Difference]: With dead ends: 126 [2021-05-03 14:30:33,670 INFO L226 Difference]: Without dead ends: 126 [2021-05-03 14:30:33,670 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 407.0ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:30:33,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-03 14:30:33,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 102. [2021-05-03 14:30:33,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0594059405940595) internal successors, (208), 101 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:33,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 208 transitions. [2021-05-03 14:30:33,672 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 208 transitions. Word has length 17 [2021-05-03 14:30:33,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:33,672 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 208 transitions. [2021-05-03 14:30:33,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:33,672 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 208 transitions. [2021-05-03 14:30:33,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:33,672 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:33,672 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:33,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable704 [2021-05-03 14:30:33,877 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:33,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:33,877 INFO L82 PathProgramCache]: Analyzing trace with hash -436365568, now seen corresponding path program 122 times [2021-05-03 14:30:33,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:33,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575039706] [2021-05-03 14:30:33,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:33,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:34,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575039706] [2021-05-03 14:30:34,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089695983] [2021-05-03 14:30:34,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:34,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:30:34,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:34,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:30:34,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:34,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:34,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:34,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:34,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827211477] [2021-05-03 14:30:34,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:34,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:34,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:34,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:34,281 INFO L87 Difference]: Start difference. First operand 102 states and 208 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:34,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:34,560 INFO L93 Difference]: Finished difference Result 118 states and 239 transitions. [2021-05-03 14:30:34,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:30:34,560 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:34,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:34,561 INFO L225 Difference]: With dead ends: 118 [2021-05-03 14:30:34,561 INFO L226 Difference]: Without dead ends: 118 [2021-05-03 14:30:34,561 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 426.8ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:30:34,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-03 14:30:34,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 102. [2021-05-03 14:30:34,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0594059405940595) internal successors, (208), 101 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:34,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 208 transitions. [2021-05-03 14:30:34,563 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 208 transitions. Word has length 17 [2021-05-03 14:30:34,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:34,564 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 208 transitions. [2021-05-03 14:30:34,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:34,564 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 208 transitions. [2021-05-03 14:30:34,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:34,564 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:34,564 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:34,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable705,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:34,769 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:34,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:34,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1730516677, now seen corresponding path program 123 times [2021-05-03 14:30:34,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:34,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533987956] [2021-05-03 14:30:34,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:34,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:34,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533987956] [2021-05-03 14:30:34,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781197507] [2021-05-03 14:30:34,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:34,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:30:34,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:34,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:30:34,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:35,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:35,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:35,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:35,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548581500] [2021-05-03 14:30:35,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:35,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:35,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:35,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:35,131 INFO L87 Difference]: Start difference. First operand 102 states and 208 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:35,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:35,354 INFO L93 Difference]: Finished difference Result 138 states and 264 transitions. [2021-05-03 14:30:35,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:30:35,354 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:35,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:35,355 INFO L225 Difference]: With dead ends: 138 [2021-05-03 14:30:35,355 INFO L226 Difference]: Without dead ends: 134 [2021-05-03 14:30:35,355 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 379.3ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:30:35,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-03 14:30:35,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 107. [2021-05-03 14:30:35,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:35,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-05-03 14:30:35,357 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 17 [2021-05-03 14:30:35,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:35,357 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-05-03 14:30:35,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:35,357 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-05-03 14:30:35,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:35,357 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:35,357 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:35,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:35,558 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:35,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:35,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1487766277, now seen corresponding path program 124 times [2021-05-03 14:30:35,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:35,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030372390] [2021-05-03 14:30:35,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:35,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030372390] [2021-05-03 14:30:35,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11559272] [2021-05-03 14:30:35,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:35,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:30:35,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:35,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:35,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:35,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:35,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:35,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14047896] [2021-05-03 14:30:35,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:35,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:35,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:35,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:35,962 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:36,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:36,182 INFO L93 Difference]: Finished difference Result 112 states and 227 transitions. [2021-05-03 14:30:36,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:30:36,183 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:36,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:36,183 INFO L225 Difference]: With dead ends: 112 [2021-05-03 14:30:36,183 INFO L226 Difference]: Without dead ends: 112 [2021-05-03 14:30:36,183 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 352.5ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:30:36,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-03 14:30:36,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 100. [2021-05-03 14:30:36,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 99 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:36,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 203 transitions. [2021-05-03 14:30:36,185 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 203 transitions. Word has length 17 [2021-05-03 14:30:36,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:36,185 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 203 transitions. [2021-05-03 14:30:36,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:36,185 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 203 transitions. [2021-05-03 14:30:36,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:36,185 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:36,185 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:36,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable711 [2021-05-03 14:30:36,386 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:36,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:36,386 INFO L82 PathProgramCache]: Analyzing trace with hash 659521213, now seen corresponding path program 125 times [2021-05-03 14:30:36,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:36,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693217585] [2021-05-03 14:30:36,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:36,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693217585] [2021-05-03 14:30:36,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417823255] [2021-05-03 14:30:36,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:36,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:30:36,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:36,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:36,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:36,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:36,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:36,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912303912] [2021-05-03 14:30:36,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:36,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:36,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:36,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:36,682 INFO L87 Difference]: Start difference. First operand 100 states and 203 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:36,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:36,911 INFO L93 Difference]: Finished difference Result 129 states and 253 transitions. [2021-05-03 14:30:36,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:30:36,912 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:36,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:36,912 INFO L225 Difference]: With dead ends: 129 [2021-05-03 14:30:36,912 INFO L226 Difference]: Without dead ends: 127 [2021-05-03 14:30:36,913 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 267.3ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:30:36,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-03 14:30:36,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2021-05-03 14:30:36,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.058252427184466) internal successors, (212), 103 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:36,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 212 transitions. [2021-05-03 14:30:36,914 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 212 transitions. Word has length 17 [2021-05-03 14:30:36,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:36,914 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 212 transitions. [2021-05-03 14:30:36,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:36,914 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 212 transitions. [2021-05-03 14:30:36,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:36,914 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:36,914 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:37,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:37,115 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:37,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:37,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1994112543, now seen corresponding path program 126 times [2021-05-03 14:30:37,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:37,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852777915] [2021-05-03 14:30:37,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:37,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:37,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852777915] [2021-05-03 14:30:37,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880212873] [2021-05-03 14:30:37,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:37,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:30:37,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:37,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:30:37,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:37,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:37,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:37,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:37,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831145389] [2021-05-03 14:30:37,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:37,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:37,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:37,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:37,464 INFO L87 Difference]: Start difference. First operand 104 states and 212 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:37,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:37,746 INFO L93 Difference]: Finished difference Result 135 states and 267 transitions. [2021-05-03 14:30:37,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:30:37,746 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:37,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:37,747 INFO L225 Difference]: With dead ends: 135 [2021-05-03 14:30:37,747 INFO L226 Difference]: Without dead ends: 135 [2021-05-03 14:30:37,747 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 378.6ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:30:37,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-03 14:30:37,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 103. [2021-05-03 14:30:37,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0588235294117645) internal successors, (210), 102 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:37,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 210 transitions. [2021-05-03 14:30:37,748 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 210 transitions. Word has length 17 [2021-05-03 14:30:37,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:37,748 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 210 transitions. [2021-05-03 14:30:37,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:37,749 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 210 transitions. [2021-05-03 14:30:37,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:37,749 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:37,749 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:37,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable723 [2021-05-03 14:30:37,949 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:37,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:37,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1456256965, now seen corresponding path program 127 times [2021-05-03 14:30:37,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:37,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144370462] [2021-05-03 14:30:37,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:38,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144370462] [2021-05-03 14:30:38,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37694157] [2021-05-03 14:30:38,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:38,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:38,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:38,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:38,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:30:38,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437183573] [2021-05-03 14:30:38,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:30:38,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:38,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:30:38,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:38,260 INFO L87 Difference]: Start difference. First operand 103 states and 210 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:38,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:38,463 INFO L93 Difference]: Finished difference Result 119 states and 240 transitions. [2021-05-03 14:30:38,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:30:38,463 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:38,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:38,464 INFO L225 Difference]: With dead ends: 119 [2021-05-03 14:30:38,464 INFO L226 Difference]: Without dead ends: 119 [2021-05-03 14:30:38,464 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 263.8ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:30:38,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-03 14:30:38,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 97. [2021-05-03 14:30:38,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0416666666666665) internal successors, (196), 96 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:38,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 196 transitions. [2021-05-03 14:30:38,465 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 196 transitions. Word has length 17 [2021-05-03 14:30:38,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:38,466 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 196 transitions. [2021-05-03 14:30:38,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:38,466 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 196 transitions. [2021-05-03 14:30:38,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:38,466 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:38,466 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:38,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable727 [2021-05-03 14:30:38,681 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:38,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:38,681 INFO L82 PathProgramCache]: Analyzing trace with hash -823613725, now seen corresponding path program 128 times [2021-05-03 14:30:38,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:38,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956441926] [2021-05-03 14:30:38,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:38,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956441926] [2021-05-03 14:30:38,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468344885] [2021-05-03 14:30:38,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:38,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:30:38,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:38,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:38,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:38,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:38,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:30:38,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538545742] [2021-05-03 14:30:38,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:30:38,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:38,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:30:38,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:38,977 INFO L87 Difference]: Start difference. First operand 97 states and 196 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:39,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:39,381 INFO L93 Difference]: Finished difference Result 129 states and 253 transitions. [2021-05-03 14:30:39,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:30:39,382 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:39,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:39,382 INFO L225 Difference]: With dead ends: 129 [2021-05-03 14:30:39,382 INFO L226 Difference]: Without dead ends: 127 [2021-05-03 14:30:39,383 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 425.1ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:30:39,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-03 14:30:39,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 105. [2021-05-03 14:30:39,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0673076923076925) internal successors, (215), 104 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:39,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 215 transitions. [2021-05-03 14:30:39,384 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 215 transitions. Word has length 17 [2021-05-03 14:30:39,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:39,384 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 215 transitions. [2021-05-03 14:30:39,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:39,384 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 215 transitions. [2021-05-03 14:30:39,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:39,384 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:39,385 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:39,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-05-03 14:30:39,585 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:39,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:39,585 INFO L82 PathProgramCache]: Analyzing trace with hash 510977605, now seen corresponding path program 129 times [2021-05-03 14:30:39,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:39,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228871006] [2021-05-03 14:30:39,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:39,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:39,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228871006] [2021-05-03 14:30:39,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093039168] [2021-05-03 14:30:39,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:39,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:30:39,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:39,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:30:39,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:39,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:39,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 14:30:39,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054073245] [2021-05-03 14:30:39,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:30:39,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:39,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:30:39,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:30:39,903 INFO L87 Difference]: Start difference. First operand 105 states and 215 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:40,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:40,352 INFO L93 Difference]: Finished difference Result 135 states and 267 transitions. [2021-05-03 14:30:40,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:30:40,353 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:40,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:40,353 INFO L225 Difference]: With dead ends: 135 [2021-05-03 14:30:40,353 INFO L226 Difference]: Without dead ends: 135 [2021-05-03 14:30:40,353 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 473.5ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:30:40,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-03 14:30:40,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2021-05-03 14:30:40,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 103 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:40,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 213 transitions. [2021-05-03 14:30:40,355 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 213 transitions. Word has length 17 [2021-05-03 14:30:40,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:40,355 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 213 transitions. [2021-05-03 14:30:40,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:40,355 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 213 transitions. [2021-05-03 14:30:40,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:40,355 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:40,355 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:40,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:40,569 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:40,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:40,569 INFO L82 PathProgramCache]: Analyzing trace with hash -26877973, now seen corresponding path program 130 times [2021-05-03 14:30:40,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:40,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813489382] [2021-05-03 14:30:40,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:40,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813489382] [2021-05-03 14:30:40,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562576265] [2021-05-03 14:30:40,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:40,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:30:40,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:40,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:40,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:40,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:40,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:40,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:30:40,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562039922] [2021-05-03 14:30:40,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:30:40,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:40,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:30:40,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:40,851 INFO L87 Difference]: Start difference. First operand 104 states and 213 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:41,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:41,108 INFO L93 Difference]: Finished difference Result 126 states and 255 transitions. [2021-05-03 14:30:41,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:30:41,108 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:41,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:41,109 INFO L225 Difference]: With dead ends: 126 [2021-05-03 14:30:41,109 INFO L226 Difference]: Without dead ends: 126 [2021-05-03 14:30:41,109 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 323.2ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:30:41,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-03 14:30:41,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 103. [2021-05-03 14:30:41,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 102 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:41,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 211 transitions. [2021-05-03 14:30:41,110 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 211 transitions. Word has length 17 [2021-05-03 14:30:41,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:41,110 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 211 transitions. [2021-05-03 14:30:41,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:41,110 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 211 transitions. [2021-05-03 14:30:41,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:41,111 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:41,111 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:41,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable741,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:41,311 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:41,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:41,312 INFO L82 PathProgramCache]: Analyzing trace with hash 479468293, now seen corresponding path program 131 times [2021-05-03 14:30:41,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:41,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420897712] [2021-05-03 14:30:41,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:41,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:41,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420897712] [2021-05-03 14:30:41,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151313833] [2021-05-03 14:30:41,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:41,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:30:41,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:41,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:41,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:41,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:41,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:30:41,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809208183] [2021-05-03 14:30:41,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:30:41,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:41,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:30:41,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:41,586 INFO L87 Difference]: Start difference. First operand 103 states and 211 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:41,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:41,839 INFO L93 Difference]: Finished difference Result 118 states and 238 transitions. [2021-05-03 14:30:41,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:30:41,840 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:41,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:41,840 INFO L225 Difference]: With dead ends: 118 [2021-05-03 14:30:41,840 INFO L226 Difference]: Without dead ends: 118 [2021-05-03 14:30:41,840 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 316.1ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:30:41,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-03 14:30:41,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 97. [2021-05-03 14:30:41,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0416666666666665) internal successors, (196), 96 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:41,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 196 transitions. [2021-05-03 14:30:41,841 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 196 transitions. Word has length 17 [2021-05-03 14:30:41,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:41,842 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 196 transitions. [2021-05-03 14:30:41,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:41,842 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 196 transitions. [2021-05-03 14:30:41,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:41,842 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:41,842 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:42,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable744 [2021-05-03 14:30:42,043 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:42,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:42,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1355949057, now seen corresponding path program 132 times [2021-05-03 14:30:42,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:42,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055796468] [2021-05-03 14:30:42,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:42,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055796468] [2021-05-03 14:30:42,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026965688] [2021-05-03 14:30:42,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:42,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:30:42,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:42,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:30:42,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:42,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:42,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:30:42,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75241944] [2021-05-03 14:30:42,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:30:42,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:42,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:30:42,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:42,329 INFO L87 Difference]: Start difference. First operand 97 states and 196 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:43,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:43,351 INFO L93 Difference]: Finished difference Result 189 states and 350 transitions. [2021-05-03 14:30:43,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:30:43,351 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:43,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:43,352 INFO L225 Difference]: With dead ends: 189 [2021-05-03 14:30:43,352 INFO L226 Difference]: Without dead ends: 189 [2021-05-03 14:30:43,352 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1002.3ms TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:30:43,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-03 14:30:43,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 99. [2021-05-03 14:30:43,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 98 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:43,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 204 transitions. [2021-05-03 14:30:43,353 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 204 transitions. Word has length 17 [2021-05-03 14:30:43,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:43,354 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 204 transitions. [2021-05-03 14:30:43,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:43,354 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 204 transitions. [2021-05-03 14:30:43,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:43,354 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:43,354 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:43,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable747 [2021-05-03 14:30:43,554 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:43,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:43,555 INFO L82 PathProgramCache]: Analyzing trace with hash 818093479, now seen corresponding path program 133 times [2021-05-03 14:30:43,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:43,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476540297] [2021-05-03 14:30:43,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:43,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:43,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476540297] [2021-05-03 14:30:43,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262819015] [2021-05-03 14:30:43,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:43,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:43,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:43,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:43,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:43,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:30:43,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131384264] [2021-05-03 14:30:43,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:30:43,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:43,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:30:43,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:43,844 INFO L87 Difference]: Start difference. First operand 99 states and 204 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:44,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:44,328 INFO L93 Difference]: Finished difference Result 150 states and 298 transitions. [2021-05-03 14:30:44,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:30:44,328 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:44,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:44,329 INFO L225 Difference]: With dead ends: 150 [2021-05-03 14:30:44,329 INFO L226 Difference]: Without dead ends: 150 [2021-05-03 14:30:44,329 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 556.2ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:30:44,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-03 14:30:44,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 98. [2021-05-03 14:30:44,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.082474226804124) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:44,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 202 transitions. [2021-05-03 14:30:44,330 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 202 transitions. Word has length 17 [2021-05-03 14:30:44,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:44,331 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 202 transitions. [2021-05-03 14:30:44,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:44,331 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 202 transitions. [2021-05-03 14:30:44,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:44,331 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:44,331 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:44,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable752 [2021-05-03 14:30:44,532 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:44,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:44,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1324439745, now seen corresponding path program 134 times [2021-05-03 14:30:44,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:44,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774376825] [2021-05-03 14:30:44,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:44,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774376825] [2021-05-03 14:30:44,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480753467] [2021-05-03 14:30:44,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:44,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:30:44,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:44,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:30:44,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:44,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:44,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:30:44,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345175225] [2021-05-03 14:30:44,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:30:44,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:44,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:30:44,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:30:44,798 INFO L87 Difference]: Start difference. First operand 98 states and 202 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:45,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:45,270 INFO L93 Difference]: Finished difference Result 157 states and 313 transitions. [2021-05-03 14:30:45,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:30:45,270 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:45,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:45,271 INFO L225 Difference]: With dead ends: 157 [2021-05-03 14:30:45,271 INFO L226 Difference]: Without dead ends: 157 [2021-05-03 14:30:45,271 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 479.4ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:30:45,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-03 14:30:45,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 97. [2021-05-03 14:30:45,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0833333333333335) internal successors, (200), 96 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:45,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 200 transitions. [2021-05-03 14:30:45,273 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 200 transitions. Word has length 17 [2021-05-03 14:30:45,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:45,273 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 200 transitions. [2021-05-03 14:30:45,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:45,273 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 200 transitions. [2021-05-03 14:30:45,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:30:45,274 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:45,274 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:45,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable755,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:45,489 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:45,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:45,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1767338885, now seen corresponding path program 135 times [2021-05-03 14:30:45,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:45,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618781839] [2021-05-03 14:30:45,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:45,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:45,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618781839] [2021-05-03 14:30:45,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763912364] [2021-05-03 14:30:45,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:45,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:30:45,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:45,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:30:45,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:45,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:45,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:45,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:30:45,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748031001] [2021-05-03 14:30:45,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:30:45,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:45,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:30:45,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:30:45,714 INFO L87 Difference]: Start difference. First operand 97 states and 200 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:45,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:45,834 INFO L93 Difference]: Finished difference Result 142 states and 280 transitions. [2021-05-03 14:30:45,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:30:45,835 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:30:45,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:45,835 INFO L225 Difference]: With dead ends: 142 [2021-05-03 14:30:45,835 INFO L226 Difference]: Without dead ends: 142 [2021-05-03 14:30:45,835 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 150.1ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:30:45,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-03 14:30:45,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 94. [2021-05-03 14:30:45,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.043010752688172) internal successors, (190), 93 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:45,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 190 transitions. [2021-05-03 14:30:45,837 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 190 transitions. Word has length 17 [2021-05-03 14:30:45,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:45,837 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 190 transitions. [2021-05-03 14:30:45,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:45,837 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 190 transitions. [2021-05-03 14:30:45,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:30:45,838 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:45,838 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:46,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable758 [2021-05-03 14:30:46,049 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:46,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:46,049 INFO L82 PathProgramCache]: Analyzing trace with hash 316048736, now seen corresponding path program 136 times [2021-05-03 14:30:46,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:46,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283273465] [2021-05-03 14:30:46,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:46,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283273465] [2021-05-03 14:30:46,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969219928] [2021-05-03 14:30:46,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:46,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:30:46,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:46,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:30:46,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:46,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:46,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:30:46,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218423678] [2021-05-03 14:30:46,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:30:46,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:46,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:30:46,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:30:46,749 INFO L87 Difference]: Start difference. First operand 94 states and 190 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:48,323 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-05-03 14:30:48,589 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-05-03 14:30:48,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:48,609 INFO L93 Difference]: Finished difference Result 206 states and 419 transitions. [2021-05-03 14:30:48,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:30:48,609 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:30:48,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:48,610 INFO L225 Difference]: With dead ends: 206 [2021-05-03 14:30:48,610 INFO L226 Difference]: Without dead ends: 182 [2021-05-03 14:30:48,610 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 2088.2ms TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 14:30:48,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-03 14:30:48,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 98. [2021-05-03 14:30:48,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0618556701030926) internal successors, (200), 97 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:48,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 200 transitions. [2021-05-03 14:30:48,612 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 200 transitions. Word has length 18 [2021-05-03 14:30:48,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:48,612 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 200 transitions. [2021-05-03 14:30:48,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:48,612 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 200 transitions. [2021-05-03 14:30:48,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:30:48,612 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:48,612 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:48,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-05-03 14:30:48,829 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:48,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:48,829 INFO L82 PathProgramCache]: Analyzing trace with hash 2075337876, now seen corresponding path program 137 times [2021-05-03 14:30:48,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:48,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241821050] [2021-05-03 14:30:48,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:49,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241821050] [2021-05-03 14:30:49,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124277946] [2021-05-03 14:30:49,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:49,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:30:49,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:49,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:30:49,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:49,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:49,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:49,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:30:49,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378972984] [2021-05-03 14:30:49,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:30:49,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:49,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:30:49,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:30:49,703 INFO L87 Difference]: Start difference. First operand 98 states and 200 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:50,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:50,465 INFO L93 Difference]: Finished difference Result 124 states and 240 transitions. [2021-05-03 14:30:50,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:30:50,465 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:30:50,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:50,466 INFO L225 Difference]: With dead ends: 124 [2021-05-03 14:30:50,466 INFO L226 Difference]: Without dead ends: 109 [2021-05-03 14:30:50,466 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1238.4ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:30:50,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-03 14:30:50,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2021-05-03 14:30:50,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.0606060606060606) internal successors, (204), 99 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:50,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 204 transitions. [2021-05-03 14:30:50,467 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 204 transitions. Word has length 18 [2021-05-03 14:30:50,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:50,467 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 204 transitions. [2021-05-03 14:30:50,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:50,467 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 204 transitions. [2021-05-03 14:30:50,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:30:50,468 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:50,468 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:50,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable772 [2021-05-03 14:30:50,689 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:50,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:50,689 INFO L82 PathProgramCache]: Analyzing trace with hash 422384502, now seen corresponding path program 138 times [2021-05-03 14:30:50,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:50,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074367059] [2021-05-03 14:30:50,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:51,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074367059] [2021-05-03 14:30:51,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081123718] [2021-05-03 14:30:51,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:51,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:30:51,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:51,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:30:51,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:51,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:51,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:30:51,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341246087] [2021-05-03 14:30:51,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:30:51,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:51,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:30:51,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:30:51,658 INFO L87 Difference]: Start difference. First operand 100 states and 204 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:52,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:52,261 INFO L93 Difference]: Finished difference Result 123 states and 239 transitions. [2021-05-03 14:30:52,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:30:52,262 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:30:52,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:52,262 INFO L225 Difference]: With dead ends: 123 [2021-05-03 14:30:52,262 INFO L226 Difference]: Without dead ends: 110 [2021-05-03 14:30:52,263 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1208.7ms TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:30:52,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-03 14:30:52,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2021-05-03 14:30:52,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.06) internal successors, (206), 100 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:52,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 206 transitions. [2021-05-03 14:30:52,265 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 206 transitions. Word has length 18 [2021-05-03 14:30:52,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:52,265 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 206 transitions. [2021-05-03 14:30:52,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:52,265 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 206 transitions. [2021-05-03 14:30:52,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:30:52,265 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:52,265 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:52,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-05-03 14:30:52,481 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:52,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:52,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1154957228, now seen corresponding path program 139 times [2021-05-03 14:30:52,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:52,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696902947] [2021-05-03 14:30:52,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:52,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696902947] [2021-05-03 14:30:52,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493669260] [2021-05-03 14:30:52,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:52,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:30:52,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:53,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:53,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:30:53,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490548859] [2021-05-03 14:30:53,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:30:53,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:53,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:30:53,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:30:53,326 INFO L87 Difference]: Start difference. First operand 101 states and 206 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:54,172 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-05-03 14:30:54,307 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-05-03 14:30:54,542 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-05-03 14:30:54,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:54,914 INFO L93 Difference]: Finished difference Result 163 states and 310 transitions. [2021-05-03 14:30:54,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:30:54,914 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:30:54,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:54,915 INFO L225 Difference]: With dead ends: 163 [2021-05-03 14:30:54,915 INFO L226 Difference]: Without dead ends: 145 [2021-05-03 14:30:54,915 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1985.0ms TimeCoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 14:30:54,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-03 14:30:54,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2021-05-03 14:30:54,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.104761904761905) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 221 transitions. [2021-05-03 14:30:54,917 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 221 transitions. Word has length 18 [2021-05-03 14:30:54,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:54,917 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 221 transitions. [2021-05-03 14:30:54,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:54,917 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 221 transitions. [2021-05-03 14:30:54,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:30:54,917 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:54,917 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:55,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-05-03 14:30:55,118 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:55,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:55,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1060750436, now seen corresponding path program 140 times [2021-05-03 14:30:55,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:55,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210473522] [2021-05-03 14:30:55,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:55,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210473522] [2021-05-03 14:30:55,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871655089] [2021-05-03 14:30:55,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:55,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:30:55,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:55,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:30:55,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:55,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:55,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:30:55,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973351004] [2021-05-03 14:30:55,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:30:55,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:55,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:30:55,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:30:55,896 INFO L87 Difference]: Start difference. First operand 106 states and 221 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:56,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:56,533 INFO L93 Difference]: Finished difference Result 132 states and 262 transitions. [2021-05-03 14:30:56,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:30:56,533 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:30:56,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:56,534 INFO L225 Difference]: With dead ends: 132 [2021-05-03 14:30:56,534 INFO L226 Difference]: Without dead ends: 119 [2021-05-03 14:30:56,534 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1049.2ms TimeCoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:30:56,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-03 14:30:56,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 110. [2021-05-03 14:30:56,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1009174311926606) internal successors, (229), 109 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:56,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 229 transitions. [2021-05-03 14:30:56,536 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 229 transitions. Word has length 18 [2021-05-03 14:30:56,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:56,536 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 229 transitions. [2021-05-03 14:30:56,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:56,536 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 229 transitions. [2021-05-03 14:30:56,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:30:56,536 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:56,536 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:56,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable806,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:56,741 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:56,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:56,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1656875130, now seen corresponding path program 141 times [2021-05-03 14:30:56,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:56,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779425698] [2021-05-03 14:30:56,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:56,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779425698] [2021-05-03 14:30:56,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974676639] [2021-05-03 14:30:56,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:56,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:30:56,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:56,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 14:30:56,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:30:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:57,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:30:57,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:30:57,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356804641] [2021-05-03 14:30:57,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:30:57,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:30:57,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:30:57,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:30:57,587 INFO L87 Difference]: Start difference. First operand 110 states and 229 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:58,260 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-05-03 14:30:58,436 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-05-03 14:30:58,616 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-05-03 14:30:58,768 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-05-03 14:30:59,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:30:59,532 INFO L93 Difference]: Finished difference Result 177 states and 347 transitions. [2021-05-03 14:30:59,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:30:59,532 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:30:59,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:30:59,533 INFO L225 Difference]: With dead ends: 177 [2021-05-03 14:30:59,533 INFO L226 Difference]: Without dead ends: 152 [2021-05-03 14:30:59,533 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 2275.8ms TimeCoverageRelationStatistics Valid=217, Invalid=1505, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 14:30:59,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-03 14:30:59,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 112. [2021-05-03 14:30:59,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.1171171171171173) internal successors, (235), 111 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:59,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 235 transitions. [2021-05-03 14:30:59,535 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 235 transitions. Word has length 18 [2021-05-03 14:30:59,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:30:59,535 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 235 transitions. [2021-05-03 14:30:59,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:30:59,535 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 235 transitions. [2021-05-03 14:30:59,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:30:59,535 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:30:59,535 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:30:59,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable818,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:59,736 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:30:59,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:30:59,736 INFO L82 PathProgramCache]: Analyzing trace with hash -2131745900, now seen corresponding path program 142 times [2021-05-03 14:30:59,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:30:59,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664205590] [2021-05-03 14:30:59,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:30:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:30:59,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:30:59,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664205590] [2021-05-03 14:30:59,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569172535] [2021-05-03 14:30:59,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:30:59,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:30:59,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:30:59,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:30:59,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:00,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:00,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:31:00,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912417665] [2021-05-03 14:31:00,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:31:00,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:00,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:31:00,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:31:00,479 INFO L87 Difference]: Start difference. First operand 112 states and 235 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:01,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:01,678 INFO L93 Difference]: Finished difference Result 169 states and 335 transitions. [2021-05-03 14:31:01,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:31:01,678 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:01,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:01,678 INFO L225 Difference]: With dead ends: 169 [2021-05-03 14:31:01,678 INFO L226 Difference]: Without dead ends: 151 [2021-05-03 14:31:01,679 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1480.5ms TimeCoverageRelationStatistics Valid=177, Invalid=1305, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 14:31:01,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-03 14:31:01,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 115. [2021-05-03 14:31:01,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1228070175438596) internal successors, (242), 114 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:01,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 242 transitions. [2021-05-03 14:31:01,680 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 242 transitions. Word has length 18 [2021-05-03 14:31:01,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:01,680 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 242 transitions. [2021-05-03 14:31:01,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:01,680 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 242 transitions. [2021-05-03 14:31:01,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:01,680 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:01,680 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:01,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable829,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:01,881 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:01,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:01,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1335010148, now seen corresponding path program 143 times [2021-05-03 14:31:01,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:01,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305887925] [2021-05-03 14:31:01,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:02,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305887925] [2021-05-03 14:31:02,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395099597] [2021-05-03 14:31:02,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:02,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:31:02,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:02,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:31:02,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:02,569 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:31:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:02,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:02,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:31:02,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438381618] [2021-05-03 14:31:02,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:31:02,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:02,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:31:02,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:31:02,740 INFO L87 Difference]: Start difference. First operand 115 states and 242 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:03,699 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-05-03 14:31:03,983 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-05-03 14:31:04,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:04,407 INFO L93 Difference]: Finished difference Result 188 states and 360 transitions. [2021-05-03 14:31:04,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:31:04,407 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:04,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:04,408 INFO L225 Difference]: With dead ends: 188 [2021-05-03 14:31:04,408 INFO L226 Difference]: Without dead ends: 156 [2021-05-03 14:31:04,408 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1956.7ms TimeCoverageRelationStatistics Valid=192, Invalid=1368, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 14:31:04,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-03 14:31:04,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 118. [2021-05-03 14:31:04,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1367521367521367) internal successors, (250), 117 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:04,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 250 transitions. [2021-05-03 14:31:04,410 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 250 transitions. Word has length 18 [2021-05-03 14:31:04,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:04,410 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 250 transitions. [2021-05-03 14:31:04,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:04,410 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 250 transitions. [2021-05-03 14:31:04,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:04,410 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:04,410 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:04,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-05-03 14:31:04,611 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:04,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:04,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1158851330, now seen corresponding path program 144 times [2021-05-03 14:31:04,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:04,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586268989] [2021-05-03 14:31:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:04,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586268989] [2021-05-03 14:31:04,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349801463] [2021-05-03 14:31:04,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:04,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:31:04,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:04,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 14:31:04,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:05,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:05,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:31:05,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499275038] [2021-05-03 14:31:05,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:31:05,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:05,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:31:05,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:31:05,341 INFO L87 Difference]: Start difference. First operand 118 states and 250 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:06,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:06,076 INFO L93 Difference]: Finished difference Result 140 states and 283 transitions. [2021-05-03 14:31:06,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:31:06,077 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:06,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:06,077 INFO L225 Difference]: With dead ends: 140 [2021-05-03 14:31:06,077 INFO L226 Difference]: Without dead ends: 125 [2021-05-03 14:31:06,077 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1086.8ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:31:06,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-03 14:31:06,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 119. [2021-05-03 14:31:06,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.135593220338983) internal successors, (252), 118 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:06,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 252 transitions. [2021-05-03 14:31:06,079 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 252 transitions. Word has length 18 [2021-05-03 14:31:06,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:06,079 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 252 transitions. [2021-05-03 14:31:06,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:06,079 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 252 transitions. [2021-05-03 14:31:06,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:06,079 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:06,079 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:06,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable851 [2021-05-03 14:31:06,281 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:06,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:06,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1483162592, now seen corresponding path program 145 times [2021-05-03 14:31:06,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:06,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372204883] [2021-05-03 14:31:06,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:06,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:06,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:06,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372204883] [2021-05-03 14:31:06,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733748112] [2021-05-03 14:31:06,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:06,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:31:06,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:07,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:07,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:07,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:31:07,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790716170] [2021-05-03 14:31:07,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:31:07,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:07,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:31:07,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:31:07,111 INFO L87 Difference]: Start difference. First operand 119 states and 252 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:07,788 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 39 [2021-05-03 14:31:07,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:07,991 INFO L93 Difference]: Finished difference Result 150 states and 299 transitions. [2021-05-03 14:31:07,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:31:07,991 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:07,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:07,992 INFO L225 Difference]: With dead ends: 150 [2021-05-03 14:31:07,992 INFO L226 Difference]: Without dead ends: 143 [2021-05-03 14:31:07,992 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1331.4ms TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:31:07,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-03 14:31:07,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 120. [2021-05-03 14:31:07,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.142857142857143) internal successors, (255), 119 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:07,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 255 transitions. [2021-05-03 14:31:07,994 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 255 transitions. Word has length 18 [2021-05-03 14:31:07,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:07,994 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 255 transitions. [2021-05-03 14:31:07,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:07,994 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 255 transitions. [2021-05-03 14:31:07,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:07,994 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:07,994 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:08,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable865 [2021-05-03 14:31:08,195 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:08,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:08,195 INFO L82 PathProgramCache]: Analyzing trace with hash -94179138, now seen corresponding path program 146 times [2021-05-03 14:31:08,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:08,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112881602] [2021-05-03 14:31:08,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:08,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:08,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112881602] [2021-05-03 14:31:08,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203714312] [2021-05-03 14:31:08,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:08,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:31:08,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:08,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 14:31:08,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:09,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:09,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:31:09,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090147883] [2021-05-03 14:31:09,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:31:09,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:09,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:31:09,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:31:09,200 INFO L87 Difference]: Start difference. First operand 120 states and 255 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:09,594 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-05-03 14:31:10,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:10,461 INFO L93 Difference]: Finished difference Result 177 states and 342 transitions. [2021-05-03 14:31:10,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:31:10,462 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:10,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:10,462 INFO L225 Difference]: With dead ends: 177 [2021-05-03 14:31:10,462 INFO L226 Difference]: Without dead ends: 146 [2021-05-03 14:31:10,462 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1738.3ms TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:31:10,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-03 14:31:10,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 119. [2021-05-03 14:31:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.135593220338983) internal successors, (252), 118 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:10,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 252 transitions. [2021-05-03 14:31:10,464 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 252 transitions. Word has length 18 [2021-05-03 14:31:10,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:10,464 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 252 transitions. [2021-05-03 14:31:10,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:10,464 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 252 transitions. [2021-05-03 14:31:10,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:10,464 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:10,465 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:10,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable878,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:10,665 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:10,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:10,665 INFO L82 PathProgramCache]: Analyzing trace with hash -863772573, now seen corresponding path program 147 times [2021-05-03 14:31:10,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:10,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491489820] [2021-05-03 14:31:10,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:31:10,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491489820] [2021-05-03 14:31:10,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373806047] [2021-05-03 14:31:10,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:10,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:31:10,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:10,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:31:10,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:11,160 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-03 14:31:11,404 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 14:31:11,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-05-03 14:31:11,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,423 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 14:31:11,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-05-03 14:31:11,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,435 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 14:31:11,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-05-03 14:31:11,436 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,445 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 14:31:11,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-05-03 14:31:11,446 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,456 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 14:31:11,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-05-03 14:31:11,458 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,478 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 14:31:11,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-05-03 14:31:11,480 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,489 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 14:31:11,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-05-03 14:31:11,491 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,499 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 14:31:11,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-05-03 14:31:11,500 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,509 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 14:31:11,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-05-03 14:31:11,511 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,521 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 14:31:11,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-05-03 14:31:11,522 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,534 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 14:31:11,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-05-03 14:31:11,543 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,557 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:31:11,558 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,566 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 14:31:11,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-05-03 14:31:11,568 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,576 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 14:31:11,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-05-03 14:31:11,580 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,591 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 14:31:11,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-05-03 14:31:11,593 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:11,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:11,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-05-03 14:31:11,602 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,607 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:31:11,608 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,619 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 14:31:11,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-05-03 14:31:11,620 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,625 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:31:11,626 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,637 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 14:31:11,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-05-03 14:31:11,638 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,648 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 14:31:11,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-05-03 14:31:11,650 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,660 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 14:31:11,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-05-03 14:31:11,661 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,674 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 14:31:11,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-05-03 14:31:11,677 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,687 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 14:31:11,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-05-03 14:31:11,689 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,693 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:31:11,694 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,701 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 14:31:11,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-05-03 14:31:11,703 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,792 INFO L628 ElimStorePlain]: treesize reduction 21, result has 71.6 percent of original size [2021-05-03 14:31:11,792 INFO L518 ElimStorePlain]: Eliminatee scoreA vanished before elimination [2021-05-03 14:31:11,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 14:31:11,795 INFO L247 ElimStorePlain]: Needed 27 recursive calls to eliminate 3 variables, input treesize:1304, output treesize:50 [2021-05-03 14:31:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:11,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:11,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-05-03 14:31:11,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258340054] [2021-05-03 14:31:11,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:31:11,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:11,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:31:11,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:31:11,905 INFO L87 Difference]: Start difference. First operand 119 states and 252 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:12,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:12,794 INFO L93 Difference]: Finished difference Result 177 states and 349 transitions. [2021-05-03 14:31:12,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:31:12,794 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:12,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:12,795 INFO L225 Difference]: With dead ends: 177 [2021-05-03 14:31:12,795 INFO L226 Difference]: Without dead ends: 177 [2021-05-03 14:31:12,795 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1186.2ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:31:12,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-03 14:31:12,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 116. [2021-05-03 14:31:12,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.130434782608696) internal successors, (245), 115 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:12,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 245 transitions. [2021-05-03 14:31:12,797 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 245 transitions. Word has length 18 [2021-05-03 14:31:12,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:12,797 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 245 transitions. [2021-05-03 14:31:12,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:12,797 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 245 transitions. [2021-05-03 14:31:12,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:12,797 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:12,797 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:12,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable892,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:12,998 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:12,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:12,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1267484832, now seen corresponding path program 148 times [2021-05-03 14:31:12,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:12,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195601088] [2021-05-03 14:31:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:13,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195601088] [2021-05-03 14:31:13,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743610435] [2021-05-03 14:31:13,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:13,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:31:13,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:13,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:31:13,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:13,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:13,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:31:13,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574718530] [2021-05-03 14:31:13,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:31:13,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:13,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:31:13,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:31:13,838 INFO L87 Difference]: Start difference. First operand 116 states and 245 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:14,283 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2021-05-03 14:31:14,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:14,577 INFO L93 Difference]: Finished difference Result 155 states and 314 transitions. [2021-05-03 14:31:14,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:31:14,577 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:14,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:14,578 INFO L225 Difference]: With dead ends: 155 [2021-05-03 14:31:14,578 INFO L226 Difference]: Without dead ends: 148 [2021-05-03 14:31:14,578 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1111.3ms TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:31:14,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-03 14:31:14,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 118. [2021-05-03 14:31:14,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1367521367521367) internal successors, (250), 117 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:14,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 250 transitions. [2021-05-03 14:31:14,580 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 250 transitions. Word has length 18 [2021-05-03 14:31:14,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:14,580 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 250 transitions. [2021-05-03 14:31:14,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:14,580 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 250 transitions. [2021-05-03 14:31:14,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:14,580 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:14,580 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:14,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable918,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:14,781 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:14,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:14,781 INFO L82 PathProgramCache]: Analyzing trace with hash -309856898, now seen corresponding path program 149 times [2021-05-03 14:31:14,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:14,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324225778] [2021-05-03 14:31:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:15,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:15,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324225778] [2021-05-03 14:31:15,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867887109] [2021-05-03 14:31:15,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:15,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:31:15,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:15,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:31:15,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:15,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:15,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:15,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:31:15,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423695941] [2021-05-03 14:31:15,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:31:15,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:15,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:31:15,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:31:15,615 INFO L87 Difference]: Start difference. First operand 118 states and 250 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:16,308 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-05-03 14:31:16,531 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-05-03 14:31:16,673 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-05-03 14:31:16,827 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-05-03 14:31:17,146 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-05-03 14:31:17,298 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-05-03 14:31:17,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:17,350 INFO L93 Difference]: Finished difference Result 186 states and 363 transitions. [2021-05-03 14:31:17,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:31:17,351 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:17,351 INFO L225 Difference]: With dead ends: 186 [2021-05-03 14:31:17,351 INFO L226 Difference]: Without dead ends: 162 [2021-05-03 14:31:17,351 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 2008.7ms TimeCoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:31:17,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-03 14:31:17,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2021-05-03 14:31:17,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.158333333333333) internal successors, (259), 120 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:17,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 259 transitions. [2021-05-03 14:31:17,353 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 259 transitions. Word has length 18 [2021-05-03 14:31:17,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:17,353 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 259 transitions. [2021-05-03 14:31:17,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:17,353 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 259 transitions. [2021-05-03 14:31:17,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:17,353 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:17,353 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:17,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable931 [2021-05-03 14:31:17,554 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:17,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:17,554 INFO L82 PathProgramCache]: Analyzing trace with hash 196489368, now seen corresponding path program 150 times [2021-05-03 14:31:17,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:17,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049914582] [2021-05-03 14:31:17,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:17,875 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 32 [2021-05-03 14:31:17,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:17,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049914582] [2021-05-03 14:31:17,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136824185] [2021-05-03 14:31:17,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:17,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:31:17,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:17,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:31:17,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:18,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:18,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:18,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:31:18,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929841440] [2021-05-03 14:31:18,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:31:18,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:18,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:31:18,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:31:18,397 INFO L87 Difference]: Start difference. First operand 121 states and 259 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:19,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:19,632 INFO L93 Difference]: Finished difference Result 192 states and 376 transitions. [2021-05-03 14:31:19,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:31:19,632 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:19,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:19,633 INFO L225 Difference]: With dead ends: 192 [2021-05-03 14:31:19,633 INFO L226 Difference]: Without dead ends: 167 [2021-05-03 14:31:19,633 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1630.7ms TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:31:19,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-03 14:31:19,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 122. [2021-05-03 14:31:19,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.15702479338843) internal successors, (261), 121 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:19,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 261 transitions. [2021-05-03 14:31:19,634 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 261 transitions. Word has length 18 [2021-05-03 14:31:19,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:19,635 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 261 transitions. [2021-05-03 14:31:19,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:19,635 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 261 transitions. [2021-05-03 14:31:19,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:19,635 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:19,635 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:19,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable942 [2021-05-03 14:31:19,836 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:19,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:19,836 INFO L82 PathProgramCache]: Analyzing trace with hash 993225120, now seen corresponding path program 151 times [2021-05-03 14:31:19,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:19,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715052483] [2021-05-03 14:31:19,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:20,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:20,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715052483] [2021-05-03 14:31:20,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019239046] [2021-05-03 14:31:20,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:20,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:31:20,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:20,477 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:31:20,662 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:20,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:20,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:31:20,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382718150] [2021-05-03 14:31:20,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:31:20,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:20,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:31:20,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:31:20,663 INFO L87 Difference]: Start difference. First operand 122 states and 261 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:21,296 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-05-03 14:31:21,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:21,588 INFO L93 Difference]: Finished difference Result 188 states and 377 transitions. [2021-05-03 14:31:21,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:31:21,589 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:21,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:21,589 INFO L225 Difference]: With dead ends: 188 [2021-05-03 14:31:21,589 INFO L226 Difference]: Without dead ends: 169 [2021-05-03 14:31:21,589 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1172.9ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:31:21,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-03 14:31:21,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 123. [2021-05-03 14:31:21,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.1639344262295084) internal successors, (264), 122 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:21,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 264 transitions. [2021-05-03 14:31:21,591 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 264 transitions. Word has length 18 [2021-05-03 14:31:21,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:21,591 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 264 transitions. [2021-05-03 14:31:21,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:21,591 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 264 transitions. [2021-05-03 14:31:21,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:21,591 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:21,591 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:21,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable954 [2021-05-03 14:31:21,792 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:21,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:21,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1286645570, now seen corresponding path program 152 times [2021-05-03 14:31:21,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:21,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467788309] [2021-05-03 14:31:21,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:22,140 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 34 [2021-05-03 14:31:22,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:22,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467788309] [2021-05-03 14:31:22,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408247680] [2021-05-03 14:31:22,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:22,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:31:22,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:22,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 14:31:22,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:22,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:22,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:31:22,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015242947] [2021-05-03 14:31:22,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:31:22,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:22,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:31:22,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:31:22,641 INFO L87 Difference]: Start difference. First operand 123 states and 264 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:23,138 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-05-03 14:31:23,412 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-05-03 14:31:23,538 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-05-03 14:31:23,673 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-05-03 14:31:23,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:23,951 INFO L93 Difference]: Finished difference Result 192 states and 382 transitions. [2021-05-03 14:31:23,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:31:23,951 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:23,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:23,952 INFO L225 Difference]: With dead ends: 192 [2021-05-03 14:31:23,952 INFO L226 Difference]: Without dead ends: 174 [2021-05-03 14:31:23,952 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1727.7ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:31:23,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-03 14:31:23,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 124. [2021-05-03 14:31:23,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.1707317073170733) internal successors, (267), 123 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:23,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 267 transitions. [2021-05-03 14:31:23,954 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 267 transitions. Word has length 18 [2021-05-03 14:31:23,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:23,954 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 267 transitions. [2021-05-03 14:31:23,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:23,954 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 267 transitions. [2021-05-03 14:31:23,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:23,954 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:23,954 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:24,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-05-03 14:31:24,155 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:24,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:24,155 INFO L82 PathProgramCache]: Analyzing trace with hash -603138887, now seen corresponding path program 153 times [2021-05-03 14:31:24,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:24,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027536437] [2021-05-03 14:31:24,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:31:24,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027536437] [2021-05-03 14:31:24,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021279396] [2021-05-03 14:31:24,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:24,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:31:24,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:24,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:31:24,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:31:24,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:24,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:31:24,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133076984] [2021-05-03 14:31:24,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:31:24,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:24,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:31:24,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:31:24,570 INFO L87 Difference]: Start difference. First operand 124 states and 267 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:24,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:24,793 INFO L93 Difference]: Finished difference Result 131 states and 278 transitions. [2021-05-03 14:31:24,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:31:24,794 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:24,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:24,794 INFO L225 Difference]: With dead ends: 131 [2021-05-03 14:31:24,794 INFO L226 Difference]: Without dead ends: 131 [2021-05-03 14:31:24,794 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 375.0ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:31:24,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-03 14:31:24,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 116. [2021-05-03 14:31:24,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1739130434782608) internal successors, (250), 115 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:24,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 250 transitions. [2021-05-03 14:31:24,796 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 250 transitions. Word has length 18 [2021-05-03 14:31:24,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:24,796 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 250 transitions. [2021-05-03 14:31:24,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:24,796 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 250 transitions. [2021-05-03 14:31:24,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:24,796 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:24,796 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:24,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable979,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:24,997 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:24,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:24,997 INFO L82 PathProgramCache]: Analyzing trace with hash -489909818, now seen corresponding path program 154 times [2021-05-03 14:31:24,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:24,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702480422] [2021-05-03 14:31:24,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:25,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:25,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702480422] [2021-05-03 14:31:25,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960021587] [2021-05-03 14:31:25,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:25,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:31:25,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:25,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:31:25,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:25,835 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-05-03 14:31:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:26,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:26,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:31:26,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522895683] [2021-05-03 14:31:26,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:31:26,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:26,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:31:26,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:31:26,024 INFO L87 Difference]: Start difference. First operand 116 states and 250 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:26,242 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-05-03 14:31:26,406 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-05-03 14:31:26,775 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-05-03 14:31:27,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:27,051 INFO L93 Difference]: Finished difference Result 182 states and 366 transitions. [2021-05-03 14:31:27,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:31:27,051 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:27,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:27,052 INFO L225 Difference]: With dead ends: 182 [2021-05-03 14:31:27,052 INFO L226 Difference]: Without dead ends: 163 [2021-05-03 14:31:27,052 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1538.1ms TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:31:27,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-03 14:31:27,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 115. [2021-05-03 14:31:27,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.175438596491228) internal successors, (248), 114 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:27,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 248 transitions. [2021-05-03 14:31:27,054 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 248 transitions. Word has length 18 [2021-05-03 14:31:27,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:27,054 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 248 transitions. [2021-05-03 14:31:27,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:27,054 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 248 transitions. [2021-05-03 14:31:27,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:27,054 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:27,054 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:27,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable985 [2021-05-03 14:31:27,255 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:27,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:27,255 INFO L82 PathProgramCache]: Analyzing trace with hash 16436448, now seen corresponding path program 155 times [2021-05-03 14:31:27,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:27,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924273520] [2021-05-03 14:31:27,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:27,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924273520] [2021-05-03 14:31:27,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424217684] [2021-05-03 14:31:27,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:27,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:31:27,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:27,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:31:27,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:27,820 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:31:28,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:28,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:28,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:31:28,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143765876] [2021-05-03 14:31:28,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:31:28,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:28,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:31:28,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:31:28,105 INFO L87 Difference]: Start difference. First operand 115 states and 248 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:28,443 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-05-03 14:31:29,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:29,119 INFO L93 Difference]: Finished difference Result 217 states and 431 transitions. [2021-05-03 14:31:29,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:31:29,120 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:29,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:29,121 INFO L225 Difference]: With dead ends: 217 [2021-05-03 14:31:29,121 INFO L226 Difference]: Without dead ends: 184 [2021-05-03 14:31:29,121 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1375.4ms TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:31:29,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-05-03 14:31:29,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 120. [2021-05-03 14:31:29,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2184873949579833) internal successors, (264), 119 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:29,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 264 transitions. [2021-05-03 14:31:29,122 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 264 transitions. Word has length 18 [2021-05-03 14:31:29,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:29,122 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 264 transitions. [2021-05-03 14:31:29,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:29,123 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 264 transitions. [2021-05-03 14:31:29,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:29,123 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:29,123 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:29,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable995,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:29,349 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:29,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:29,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1660498388, now seen corresponding path program 156 times [2021-05-03 14:31:29,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:29,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471495833] [2021-05-03 14:31:29,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:29,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:29,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471495833] [2021-05-03 14:31:29,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660374402] [2021-05-03 14:31:29,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:29,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:31:29,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:29,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:31:29,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:30,122 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-05-03 14:31:30,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:30,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:30,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:31:30,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341648855] [2021-05-03 14:31:30,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:31:30,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:30,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:31:30,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:31:30,474 INFO L87 Difference]: Start difference. First operand 120 states and 264 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:30,839 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-05-03 14:31:31,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:31,218 INFO L93 Difference]: Finished difference Result 139 states and 292 transitions. [2021-05-03 14:31:31,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:31:31,219 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:31,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:31,219 INFO L225 Difference]: With dead ends: 139 [2021-05-03 14:31:31,219 INFO L226 Difference]: Without dead ends: 124 [2021-05-03 14:31:31,220 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1451.9ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:31:31,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-03 14:31:31,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2021-05-03 14:31:31,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.216666666666667) internal successors, (266), 120 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:31,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 266 transitions. [2021-05-03 14:31:31,221 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 266 transitions. Word has length 18 [2021-05-03 14:31:31,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:31,221 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 266 transitions. [2021-05-03 14:31:31,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:31,221 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 266 transitions. [2021-05-03 14:31:31,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:31,221 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:31,221 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:31,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1007 [2021-05-03 14:31:31,422 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:31,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:31,422 INFO L82 PathProgramCache]: Analyzing trace with hash 7545014, now seen corresponding path program 157 times [2021-05-03 14:31:31,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:31,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945870837] [2021-05-03 14:31:31,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:31,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:31,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945870837] [2021-05-03 14:31:31,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805731682] [2021-05-03 14:31:31,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:31,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 14:31:31,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:32,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:32,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:31:32,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176266274] [2021-05-03 14:31:32,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:31:32,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:32,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:31:32,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:31:32,421 INFO L87 Difference]: Start difference. First operand 121 states and 266 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:32,759 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-05-03 14:31:32,934 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-05-03 14:31:33,125 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-05-03 14:31:33,323 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2021-05-03 14:31:33,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:33,572 INFO L93 Difference]: Finished difference Result 140 states and 295 transitions. [2021-05-03 14:31:33,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:31:33,573 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:33,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:33,573 INFO L225 Difference]: With dead ends: 140 [2021-05-03 14:31:33,573 INFO L226 Difference]: Without dead ends: 127 [2021-05-03 14:31:33,574 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1671.1ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:31:33,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-03 14:31:33,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 122. [2021-05-03 14:31:33,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.2148760330578514) internal successors, (268), 121 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:33,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 268 transitions. [2021-05-03 14:31:33,575 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 268 transitions. Word has length 18 [2021-05-03 14:31:33,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:33,575 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 268 transitions. [2021-05-03 14:31:33,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:33,575 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 268 transitions. [2021-05-03 14:31:33,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:33,575 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:33,575 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:33,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1019,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:33,781 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:33,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:33,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1569796716, now seen corresponding path program 158 times [2021-05-03 14:31:33,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:33,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618702290] [2021-05-03 14:31:33,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:34,076 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 33 [2021-05-03 14:31:34,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:34,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618702290] [2021-05-03 14:31:34,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654084412] [2021-05-03 14:31:34,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:34,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:31:34,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:34,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:31:34,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:34,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:34,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:34,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:31:34,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519589321] [2021-05-03 14:31:34,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:31:34,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:34,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:31:34,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:31:34,729 INFO L87 Difference]: Start difference. First operand 122 states and 268 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:35,527 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-05-03 14:31:35,657 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 34 [2021-05-03 14:31:35,829 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-05-03 14:31:35,980 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-05-03 14:31:36,158 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-05-03 14:31:36,293 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-05-03 14:31:36,465 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-05-03 14:31:36,603 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-05-03 14:31:36,856 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-05-03 14:31:36,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:36,883 INFO L93 Difference]: Finished difference Result 206 states and 404 transitions. [2021-05-03 14:31:36,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:31:36,883 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:36,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:36,884 INFO L225 Difference]: With dead ends: 206 [2021-05-03 14:31:36,884 INFO L226 Difference]: Without dead ends: 181 [2021-05-03 14:31:36,884 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 2568.3ms TimeCoverageRelationStatistics Valid=200, Invalid=1206, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 14:31:36,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-03 14:31:36,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 120. [2021-05-03 14:31:36,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2184873949579833) internal successors, (264), 119 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:36,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 264 transitions. [2021-05-03 14:31:36,886 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 264 transitions. Word has length 18 [2021-05-03 14:31:36,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:36,886 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 264 transitions. [2021-05-03 14:31:36,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:36,886 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 264 transitions. [2021-05-03 14:31:36,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:36,886 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:36,886 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:37,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1030 [2021-05-03 14:31:37,089 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:37,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:37,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1475589924, now seen corresponding path program 159 times [2021-05-03 14:31:37,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:37,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906199074] [2021-05-03 14:31:37,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:37,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:37,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906199074] [2021-05-03 14:31:37,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032640755] [2021-05-03 14:31:37,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:37,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:31:37,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:37,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 14:31:37,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:37,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:37,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:31:37,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2657892] [2021-05-03 14:31:37,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:31:37,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:37,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:31:37,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:31:37,959 INFO L87 Difference]: Start difference. First operand 120 states and 264 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:38,234 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-05-03 14:31:38,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:38,646 INFO L93 Difference]: Finished difference Result 138 states and 291 transitions. [2021-05-03 14:31:38,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:31:38,646 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:38,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:38,647 INFO L225 Difference]: With dead ends: 138 [2021-05-03 14:31:38,647 INFO L226 Difference]: Without dead ends: 125 [2021-05-03 14:31:38,647 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1141.7ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:31:38,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-03 14:31:38,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2021-05-03 14:31:38,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.2148760330578514) internal successors, (268), 121 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:38,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 268 transitions. [2021-05-03 14:31:38,649 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 268 transitions. Word has length 18 [2021-05-03 14:31:38,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:38,649 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 268 transitions. [2021-05-03 14:31:38,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:38,649 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 268 transitions. [2021-05-03 14:31:38,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:38,649 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:38,649 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:38,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:38,850 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:38,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:38,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1242035642, now seen corresponding path program 160 times [2021-05-03 14:31:38,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:38,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192262638] [2021-05-03 14:31:38,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:39,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:39,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192262638] [2021-05-03 14:31:39,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919923054] [2021-05-03 14:31:39,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:39,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:31:39,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:39,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:31:39,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:39,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:39,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:39,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:31:39,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923247955] [2021-05-03 14:31:39,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:31:39,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:39,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:31:39,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:31:39,713 INFO L87 Difference]: Start difference. First operand 122 states and 268 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:40,285 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2021-05-03 14:31:40,592 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2021-05-03 14:31:40,771 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-05-03 14:31:41,115 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-05-03 14:31:41,357 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-05-03 14:31:41,791 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-05-03 14:31:42,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:42,027 INFO L93 Difference]: Finished difference Result 181 states and 370 transitions. [2021-05-03 14:31:42,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:31:42,027 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:42,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:42,028 INFO L225 Difference]: With dead ends: 181 [2021-05-03 14:31:42,028 INFO L226 Difference]: Without dead ends: 163 [2021-05-03 14:31:42,028 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2613.8ms TimeCoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 14:31:42,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-03 14:31:42,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 124. [2021-05-03 14:31:42,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.227642276422764) internal successors, (274), 123 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:42,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 274 transitions. [2021-05-03 14:31:42,030 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 274 transitions. Word has length 18 [2021-05-03 14:31:42,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:42,030 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 274 transitions. [2021-05-03 14:31:42,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:42,030 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 274 transitions. [2021-05-03 14:31:42,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:42,030 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:42,030 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:42,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1056 [2021-05-03 14:31:42,231 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:42,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:42,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1718340324, now seen corresponding path program 161 times [2021-05-03 14:31:42,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:42,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716275485] [2021-05-03 14:31:42,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:42,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716275485] [2021-05-03 14:31:42,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538113244] [2021-05-03 14:31:42,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:42,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:31:42,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:42,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:31:42,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:42,879 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:31:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:43,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:43,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:31:43,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680581350] [2021-05-03 14:31:43,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:31:43,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:43,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:31:43,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:31:43,138 INFO L87 Difference]: Start difference. First operand 124 states and 274 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:43,491 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-05-03 14:31:43,641 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-05-03 14:31:44,068 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-05-03 14:31:44,327 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-05-03 14:31:44,668 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-05-03 14:31:45,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:45,150 INFO L93 Difference]: Finished difference Result 216 states and 423 transitions. [2021-05-03 14:31:45,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:31:45,151 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:45,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:45,151 INFO L225 Difference]: With dead ends: 216 [2021-05-03 14:31:45,151 INFO L226 Difference]: Without dead ends: 190 [2021-05-03 14:31:45,151 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 2346.9ms TimeCoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 14:31:45,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-03 14:31:45,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 126. [2021-05-03 14:31:45,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.24) internal successors, (280), 125 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:45,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 280 transitions. [2021-05-03 14:31:45,153 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 280 transitions. Word has length 18 [2021-05-03 14:31:45,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:45,153 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 280 transitions. [2021-05-03 14:31:45,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:45,153 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 280 transitions. [2021-05-03 14:31:45,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:45,153 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:45,153 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:45,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1069,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:45,357 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:45,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:45,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1955577145, now seen corresponding path program 162 times [2021-05-03 14:31:45,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:45,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097469498] [2021-05-03 14:31:45,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:31:45,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097469498] [2021-05-03 14:31:45,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851277847] [2021-05-03 14:31:45,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:45,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:31:45,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:45,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:31:45,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:31:45,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:45,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:31:45,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726855968] [2021-05-03 14:31:45,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:31:45,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:45,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:31:45,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:31:45,698 INFO L87 Difference]: Start difference. First operand 126 states and 280 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:46,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:46,182 INFO L93 Difference]: Finished difference Result 157 states and 342 transitions. [2021-05-03 14:31:46,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:31:46,183 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:46,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:46,183 INFO L225 Difference]: With dead ends: 157 [2021-05-03 14:31:46,183 INFO L226 Difference]: Without dead ends: 157 [2021-05-03 14:31:46,184 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 605.7ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:31:46,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-03 14:31:46,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 126. [2021-05-03 14:31:46,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.24) internal successors, (280), 125 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:46,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 280 transitions. [2021-05-03 14:31:46,185 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 280 transitions. Word has length 18 [2021-05-03 14:31:46,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:46,185 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 280 transitions. [2021-05-03 14:31:46,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:46,185 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 280 transitions. [2021-05-03 14:31:46,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:46,186 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:46,186 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:46,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1082,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:46,386 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:46,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:46,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1748381908, now seen corresponding path program 163 times [2021-05-03 14:31:46,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:46,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192351750] [2021-05-03 14:31:46,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:46,698 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 35 [2021-05-03 14:31:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:46,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192351750] [2021-05-03 14:31:46,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390832930] [2021-05-03 14:31:46,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:46,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:46,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:31:46,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:47,112 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:31:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:47,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:47,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:31:47,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845118894] [2021-05-03 14:31:47,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:31:47,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:47,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:31:47,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:31:47,333 INFO L87 Difference]: Start difference. First operand 126 states and 280 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:48,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:48,500 INFO L93 Difference]: Finished difference Result 177 states and 361 transitions. [2021-05-03 14:31:48,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:31:48,500 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:48,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:48,501 INFO L225 Difference]: With dead ends: 177 [2021-05-03 14:31:48,501 INFO L226 Difference]: Without dead ends: 152 [2021-05-03 14:31:48,501 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1623.9ms TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:31:48,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-03 14:31:48,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 127. [2021-05-03 14:31:48,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.238095238095238) internal successors, (282), 126 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:48,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 282 transitions. [2021-05-03 14:31:48,503 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 282 transitions. Word has length 18 [2021-05-03 14:31:48,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:48,503 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 282 transitions. [2021-05-03 14:31:48,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:48,503 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 282 transitions. [2021-05-03 14:31:48,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:48,503 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:48,503 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:48,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1087,164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:48,704 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:48,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:48,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1749849636, now seen corresponding path program 164 times [2021-05-03 14:31:48,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:48,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886648802] [2021-05-03 14:31:48,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:48,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:48,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886648802] [2021-05-03 14:31:48,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399949124] [2021-05-03 14:31:48,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:48,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:31:48,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:48,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-03 14:31:48,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:49,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:49,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:49,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:31:49,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180511724] [2021-05-03 14:31:49,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:31:49,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:49,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:31:49,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:31:49,409 INFO L87 Difference]: Start difference. First operand 127 states and 282 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:50,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:50,335 INFO L93 Difference]: Finished difference Result 197 states and 396 transitions. [2021-05-03 14:31:50,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:31:50,336 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:50,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:50,336 INFO L225 Difference]: With dead ends: 197 [2021-05-03 14:31:50,336 INFO L226 Difference]: Without dead ends: 165 [2021-05-03 14:31:50,337 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1055.2ms TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:31:50,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-03 14:31:50,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 126. [2021-05-03 14:31:50,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.24) internal successors, (280), 125 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:50,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 280 transitions. [2021-05-03 14:31:50,338 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 280 transitions. Word has length 18 [2021-05-03 14:31:50,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:50,338 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 280 transitions. [2021-05-03 14:31:50,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:50,338 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 280 transitions. [2021-05-03 14:31:50,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:50,339 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:50,339 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:50,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1099 [2021-05-03 14:31:50,539 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:50,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:50,540 INFO L82 PathProgramCache]: Analyzing trace with hash -208132746, now seen corresponding path program 165 times [2021-05-03 14:31:50,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:50,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120475532] [2021-05-03 14:31:50,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:50,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:50,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120475532] [2021-05-03 14:31:50,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847105535] [2021-05-03 14:31:50,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:50,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:31:50,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:50,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:31:50,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:51,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:51,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:31:51,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752624397] [2021-05-03 14:31:51,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:31:51,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:51,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:31:51,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:31:51,386 INFO L87 Difference]: Start difference. First operand 126 states and 280 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:51,856 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2021-05-03 14:31:52,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:52,113 INFO L93 Difference]: Finished difference Result 156 states and 326 transitions. [2021-05-03 14:31:52,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:31:52,114 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:52,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:52,114 INFO L225 Difference]: With dead ends: 156 [2021-05-03 14:31:52,114 INFO L226 Difference]: Without dead ends: 149 [2021-05-03 14:31:52,114 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1114.4ms TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:31:52,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-03 14:31:52,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 129. [2021-05-03 14:31:52,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.2421875) internal successors, (287), 128 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:52,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 287 transitions. [2021-05-03 14:31:52,116 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 287 transitions. Word has length 18 [2021-05-03 14:31:52,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:52,116 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 287 transitions. [2021-05-03 14:31:52,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:52,116 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 287 transitions. [2021-05-03 14:31:52,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:52,116 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:52,117 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:52,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-05-03 14:31:52,317 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:52,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:52,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1785474476, now seen corresponding path program 166 times [2021-05-03 14:31:52,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:52,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227618939] [2021-05-03 14:31:52,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:52,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227618939] [2021-05-03 14:31:52,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959781894] [2021-05-03 14:31:52,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:52,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:31:52,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:52,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:31:52,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:53,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:53,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:31:53,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339044772] [2021-05-03 14:31:53,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:31:53,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:53,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:31:53,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:31:53,191 INFO L87 Difference]: Start difference. First operand 129 states and 287 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:53,775 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-05-03 14:31:53,905 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-05-03 14:31:54,184 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2021-05-03 14:31:54,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:54,603 INFO L93 Difference]: Finished difference Result 174 states and 357 transitions. [2021-05-03 14:31:54,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:31:54,604 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:54,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:54,604 INFO L225 Difference]: With dead ends: 174 [2021-05-03 14:31:54,604 INFO L226 Difference]: Without dead ends: 167 [2021-05-03 14:31:54,604 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1762.8ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:31:54,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-03 14:31:54,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 130. [2021-05-03 14:31:54,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.248062015503876) internal successors, (290), 129 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:54,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 290 transitions. [2021-05-03 14:31:54,606 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 290 transitions. Word has length 18 [2021-05-03 14:31:54,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:54,606 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 290 transitions. [2021-05-03 14:31:54,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:54,606 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 290 transitions. [2021-05-03 14:31:54,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:54,606 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:54,607 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:54,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1122 [2021-05-03 14:31:54,807 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:54,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:54,807 INFO L82 PathProgramCache]: Analyzing trace with hash -450883146, now seen corresponding path program 167 times [2021-05-03 14:31:54,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:54,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364152865] [2021-05-03 14:31:54,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:55,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:55,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364152865] [2021-05-03 14:31:55,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962595484] [2021-05-03 14:31:55,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:55,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:31:55,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:55,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:31:55,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:55,396 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:31:55,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:55,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:55,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:31:55,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567520796] [2021-05-03 14:31:55,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:31:55,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:55,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:31:55,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:31:55,645 INFO L87 Difference]: Start difference. First operand 130 states and 290 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:55,974 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-05-03 14:31:56,248 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-05-03 14:31:56,453 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-05-03 14:31:56,614 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-05-03 14:31:57,064 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-05-03 14:31:57,195 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-05-03 14:31:57,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:57,216 INFO L93 Difference]: Finished difference Result 201 states and 408 transitions. [2021-05-03 14:31:57,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:31:57,217 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:31:57,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:57,217 INFO L225 Difference]: With dead ends: 201 [2021-05-03 14:31:57,217 INFO L226 Difference]: Without dead ends: 176 [2021-05-03 14:31:57,217 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1798.1ms TimeCoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:31:57,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-03 14:31:57,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 132. [2021-05-03 14:31:57,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.2442748091603053) internal successors, (294), 131 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:57,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 294 transitions. [2021-05-03 14:31:57,219 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 294 transitions. Word has length 18 [2021-05-03 14:31:57,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:57,219 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 294 transitions. [2021-05-03 14:31:57,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:57,219 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 294 transitions. [2021-05-03 14:31:57,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:31:57,219 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:57,220 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:57,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1135,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:57,420 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:57,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:57,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1279128210, now seen corresponding path program 168 times [2021-05-03 14:31:57,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:57,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389566015] [2021-05-03 14:31:57,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:57,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:57,761 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 33 [2021-05-03 14:31:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:57,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389566015] [2021-05-03 14:31:57,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140379059] [2021-05-03 14:31:57,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:57,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:31:57,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:57,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:31:57,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:58,187 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:31:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:58,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:58,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:31:58,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124852943] [2021-05-03 14:31:58,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:31:58,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:58,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:31:58,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:31:58,383 INFO L87 Difference]: Start difference. First operand 132 states and 294 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:59,261 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-05-03 14:31:59,398 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-05-03 14:31:59,567 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-05-03 14:31:59,816 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-05-03 14:31:59,939 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-05-03 14:32:00,136 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-05-03 14:32:00,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:00,159 INFO L93 Difference]: Finished difference Result 214 states and 426 transitions. [2021-05-03 14:32:00,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:32:00,160 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:32:00,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:00,161 INFO L225 Difference]: With dead ends: 214 [2021-05-03 14:32:00,161 INFO L226 Difference]: Without dead ends: 189 [2021-05-03 14:32:00,161 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 2244.0ms TimeCoverageRelationStatistics Valid=189, Invalid=1071, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 14:32:00,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-03 14:32:00,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 133. [2021-05-03 14:32:00,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.242424242424242) internal successors, (296), 132 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:00,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 296 transitions. [2021-05-03 14:32:00,163 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 296 transitions. Word has length 18 [2021-05-03 14:32:00,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:00,163 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 296 transitions. [2021-05-03 14:32:00,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:00,163 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 296 transitions. [2021-05-03 14:32:00,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:32:00,163 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:00,163 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:00,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1148 [2021-05-03 14:32:00,364 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:00,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:00,364 INFO L82 PathProgramCache]: Analyzing trace with hash -482392458, now seen corresponding path program 169 times [2021-05-03 14:32:00,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:00,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036588954] [2021-05-03 14:32:00,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:00,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036588954] [2021-05-03 14:32:00,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089065017] [2021-05-03 14:32:00,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:00,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:00,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:32:00,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:01,004 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:32:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:01,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:01,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:32:01,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136433913] [2021-05-03 14:32:01,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:32:01,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:01,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:32:01,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:32:01,212 INFO L87 Difference]: Start difference. First operand 133 states and 296 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:01,579 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-05-03 14:32:01,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:01,920 INFO L93 Difference]: Finished difference Result 198 states and 411 transitions. [2021-05-03 14:32:01,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:32:01,920 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:32:01,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:01,921 INFO L225 Difference]: With dead ends: 198 [2021-05-03 14:32:01,921 INFO L226 Difference]: Without dead ends: 179 [2021-05-03 14:32:01,921 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1037.8ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:32:01,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-03 14:32:01,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 132. [2021-05-03 14:32:01,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.2442748091603053) internal successors, (294), 131 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:01,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 294 transitions. [2021-05-03 14:32:01,923 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 294 transitions. Word has length 18 [2021-05-03 14:32:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:01,923 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 294 transitions. [2021-05-03 14:32:01,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:01,923 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 294 transitions. [2021-05-03 14:32:01,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:32:01,923 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:01,923 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:02,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1160,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:02,124 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:02,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:02,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1532704148, now seen corresponding path program 170 times [2021-05-03 14:32:02,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:02,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455623748] [2021-05-03 14:32:02,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:02,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455623748] [2021-05-03 14:32:02,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574817797] [2021-05-03 14:32:02,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:02,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:32:02,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:02,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 14:32:02,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:02,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:02,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:02,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:32:02,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887407010] [2021-05-03 14:32:02,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:32:02,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:02,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:32:02,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:32:02,994 INFO L87 Difference]: Start difference. First operand 132 states and 294 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:03,628 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-05-03 14:32:03,919 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-05-03 14:32:04,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:04,046 INFO L93 Difference]: Finished difference Result 170 states and 362 transitions. [2021-05-03 14:32:04,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:32:04,047 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:32:04,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:04,047 INFO L225 Difference]: With dead ends: 170 [2021-05-03 14:32:04,047 INFO L226 Difference]: Without dead ends: 159 [2021-05-03 14:32:04,047 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1445.7ms TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:32:04,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-03 14:32:04,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 135. [2021-05-03 14:32:04,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.2388059701492535) internal successors, (300), 134 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:04,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 300 transitions. [2021-05-03 14:32:04,049 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 300 transitions. Word has length 18 [2021-05-03 14:32:04,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:04,049 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 300 transitions. [2021-05-03 14:32:04,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:04,049 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 300 transitions. [2021-05-03 14:32:04,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:32:04,049 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:04,049 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:04,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1172 [2021-05-03 14:32:04,250 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:04,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:04,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1427671818, now seen corresponding path program 171 times [2021-05-03 14:32:04,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:04,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351036884] [2021-05-03 14:32:04,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:04,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351036884] [2021-05-03 14:32:04,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921955987] [2021-05-03 14:32:04,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:04,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:32:04,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:04,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 14:32:04,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:05,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:05,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:05,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:32:05,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854452246] [2021-05-03 14:32:05,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:32:05,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:05,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:32:05,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:32:05,039 INFO L87 Difference]: Start difference. First operand 135 states and 300 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:05,346 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-05-03 14:32:05,509 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-05-03 14:32:06,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:06,216 INFO L93 Difference]: Finished difference Result 198 states and 408 transitions. [2021-05-03 14:32:06,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:32:06,217 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:32:06,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:06,217 INFO L225 Difference]: With dead ends: 198 [2021-05-03 14:32:06,217 INFO L226 Difference]: Without dead ends: 179 [2021-05-03 14:32:06,218 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1407.2ms TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:32:06,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-03 14:32:06,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 134. [2021-05-03 14:32:06,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.2406015037593985) internal successors, (298), 133 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:06,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 298 transitions. [2021-05-03 14:32:06,219 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 298 transitions. Word has length 18 [2021-05-03 14:32:06,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:06,219 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 298 transitions. [2021-05-03 14:32:06,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:06,219 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 298 transitions. [2021-05-03 14:32:06,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:32:06,220 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:06,220 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:06,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1186,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:06,420 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:06,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:06,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1965527396, now seen corresponding path program 172 times [2021-05-03 14:32:06,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:06,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353369636] [2021-05-03 14:32:06,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:06,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:06,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353369636] [2021-05-03 14:32:06,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179768622] [2021-05-03 14:32:06,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:06,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:32:06,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:06,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:32:06,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:07,133 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:32:07,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:07,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:07,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:32:07,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349919215] [2021-05-03 14:32:07,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:32:07,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:07,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:32:07,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:32:07,361 INFO L87 Difference]: Start difference. First operand 134 states and 298 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:07,833 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-05-03 14:32:08,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:08,179 INFO L93 Difference]: Finished difference Result 197 states and 409 transitions. [2021-05-03 14:32:08,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:32:08,180 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:32:08,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:08,180 INFO L225 Difference]: With dead ends: 197 [2021-05-03 14:32:08,180 INFO L226 Difference]: Without dead ends: 178 [2021-05-03 14:32:08,180 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1260.7ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:32:08,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-05-03 14:32:08,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 134. [2021-05-03 14:32:08,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.2406015037593985) internal successors, (298), 133 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:08,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 298 transitions. [2021-05-03 14:32:08,182 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 298 transitions. Word has length 18 [2021-05-03 14:32:08,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:08,182 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 298 transitions. [2021-05-03 14:32:08,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:08,182 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 298 transitions. [2021-05-03 14:32:08,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:32:08,183 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:08,183 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:08,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1198 [2021-05-03 14:32:08,383 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:08,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:08,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1459181130, now seen corresponding path program 173 times [2021-05-03 14:32:08,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:08,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964805896] [2021-05-03 14:32:08,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:08,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:08,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964805896] [2021-05-03 14:32:08,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713355713] [2021-05-03 14:32:08,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:08,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:32:08,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:08,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 14:32:08,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:09,171 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-05-03 14:32:09,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:09,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:09,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:32:09,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604223569] [2021-05-03 14:32:09,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:32:09,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:09,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:32:09,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:32:09,520 INFO L87 Difference]: Start difference. First operand 134 states and 298 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:10,006 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-05-03 14:32:10,209 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-05-03 14:32:10,563 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-05-03 14:32:10,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:10,836 INFO L93 Difference]: Finished difference Result 232 states and 474 transitions. [2021-05-03 14:32:10,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:32:10,837 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:32:10,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:10,837 INFO L225 Difference]: With dead ends: 232 [2021-05-03 14:32:10,837 INFO L226 Difference]: Without dead ends: 199 [2021-05-03 14:32:10,838 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1759.5ms TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:32:10,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-03 14:32:10,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 134. [2021-05-03 14:32:10,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.2406015037593985) internal successors, (298), 133 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:10,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 298 transitions. [2021-05-03 14:32:10,840 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 298 transitions. Word has length 18 [2021-05-03 14:32:10,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:10,840 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 298 transitions. [2021-05-03 14:32:10,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:10,841 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 298 transitions. [2021-05-03 14:32:10,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:32:10,841 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:10,841 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:11,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1210 [2021-05-03 14:32:11,057 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:11,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:11,057 INFO L82 PathProgramCache]: Analyzing trace with hash 428334108, now seen corresponding path program 174 times [2021-05-03 14:32:11,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:11,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140581922] [2021-05-03 14:32:11,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:11,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:11,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140581922] [2021-05-03 14:32:11,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093547732] [2021-05-03 14:32:11,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:11,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:32:11,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:11,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:32:11,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:11,745 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:32:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:12,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:12,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:32:12,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593112827] [2021-05-03 14:32:12,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:32:12,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:12,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:32:12,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:32:12,012 INFO L87 Difference]: Start difference. First operand 134 states and 298 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:12,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:12,650 INFO L93 Difference]: Finished difference Result 153 states and 327 transitions. [2021-05-03 14:32:12,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:32:12,651 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:32:12,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:12,652 INFO L225 Difference]: With dead ends: 153 [2021-05-03 14:32:12,652 INFO L226 Difference]: Without dead ends: 140 [2021-05-03 14:32:12,652 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1068.9ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:32:12,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-03 14:32:12,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2021-05-03 14:32:12,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.235294117647059) internal successors, (304), 136 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:12,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 304 transitions. [2021-05-03 14:32:12,653 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 304 transitions. Word has length 18 [2021-05-03 14:32:12,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:12,653 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 304 transitions. [2021-05-03 14:32:12,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:12,653 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 304 transitions. [2021-05-03 14:32:12,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:32:12,654 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:12,654 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:12,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1221 [2021-05-03 14:32:12,854 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:12,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:12,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1149007622, now seen corresponding path program 175 times [2021-05-03 14:32:12,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:12,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193019605] [2021-05-03 14:32:12,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:13,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193019605] [2021-05-03 14:32:13,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563446667] [2021-05-03 14:32:13,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:13,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 14:32:13,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:13,653 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-05-03 14:32:13,969 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-05-03 14:32:14,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:14,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:14,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:32:14,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109591970] [2021-05-03 14:32:14,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:32:14,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:14,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:32:14,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:32:14,083 INFO L87 Difference]: Start difference. First operand 137 states and 304 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:14,429 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-05-03 14:32:14,631 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-05-03 14:32:14,943 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-05-03 14:32:15,188 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-05-03 14:32:15,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:15,498 INFO L93 Difference]: Finished difference Result 179 states and 370 transitions. [2021-05-03 14:32:15,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:32:15,499 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:32:15,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:15,500 INFO L225 Difference]: With dead ends: 179 [2021-05-03 14:32:15,500 INFO L226 Difference]: Without dead ends: 168 [2021-05-03 14:32:15,500 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 2025.3ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:32:15,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-03 14:32:15,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 138. [2021-05-03 14:32:15,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.2335766423357666) internal successors, (306), 137 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:15,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 306 transitions. [2021-05-03 14:32:15,506 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 306 transitions. Word has length 18 [2021-05-03 14:32:15,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:15,506 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 306 transitions. [2021-05-03 14:32:15,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:15,506 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 306 transitions. [2021-05-03 14:32:15,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:32:15,506 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:15,506 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:15,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1233 [2021-05-03 14:32:15,707 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:15,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:15,708 INFO L82 PathProgramCache]: Analyzing trace with hash 185583708, now seen corresponding path program 176 times [2021-05-03 14:32:15,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:15,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775199785] [2021-05-03 14:32:15,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:15,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775199785] [2021-05-03 14:32:15,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435337344] [2021-05-03 14:32:15,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:15,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:32:15,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:15,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-03 14:32:15,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:16,325 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:32:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:16,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:16,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:32:16,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414509772] [2021-05-03 14:32:16,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:32:16,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:16,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:32:16,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:32:16,610 INFO L87 Difference]: Start difference. First operand 138 states and 306 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:17,184 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-05-03 14:32:17,621 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-05-03 14:32:17,865 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-05-03 14:32:18,008 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-05-03 14:32:18,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:18,040 INFO L93 Difference]: Finished difference Result 213 states and 429 transitions. [2021-05-03 14:32:18,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:32:18,041 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:32:18,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:18,041 INFO L225 Difference]: With dead ends: 213 [2021-05-03 14:32:18,041 INFO L226 Difference]: Without dead ends: 194 [2021-05-03 14:32:18,041 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1638.9ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:32:18,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-03 14:32:18,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 136. [2021-05-03 14:32:18,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.237037037037037) internal successors, (302), 135 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:18,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 302 transitions. [2021-05-03 14:32:18,043 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 302 transitions. Word has length 18 [2021-05-03 14:32:18,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:18,043 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 302 transitions. [2021-05-03 14:32:18,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:18,043 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 302 transitions. [2021-05-03 14:32:18,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:32:18,044 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:18,044 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:18,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1242 [2021-05-03 14:32:18,249 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:18,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:18,249 INFO L82 PathProgramCache]: Analyzing trace with hash -642661356, now seen corresponding path program 177 times [2021-05-03 14:32:18,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:18,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215963077] [2021-05-03 14:32:18,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:18,604 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 32 [2021-05-03 14:32:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:18,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215963077] [2021-05-03 14:32:18,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492401174] [2021-05-03 14:32:18,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:18,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:32:18,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:18,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:32:18,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:19,059 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:32:19,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:19,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:19,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:32:19,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358080041] [2021-05-03 14:32:19,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:32:19,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:19,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:32:19,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:32:19,260 INFO L87 Difference]: Start difference. First operand 136 states and 302 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:20,031 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-05-03 14:32:20,205 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-05-03 14:32:20,428 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-05-03 14:32:20,653 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-05-03 14:32:20,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:20,673 INFO L93 Difference]: Finished difference Result 188 states and 387 transitions. [2021-05-03 14:32:20,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:32:20,674 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:32:20,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:20,674 INFO L225 Difference]: With dead ends: 188 [2021-05-03 14:32:20,674 INFO L226 Difference]: Without dead ends: 163 [2021-05-03 14:32:20,675 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1846.9ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:32:20,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-03 14:32:20,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 137. [2021-05-03 14:32:20,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.235294117647059) internal successors, (304), 136 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:20,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 304 transitions. [2021-05-03 14:32:20,676 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 304 transitions. Word has length 18 [2021-05-03 14:32:20,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:20,676 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 304 transitions. [2021-05-03 14:32:20,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:20,676 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 304 transitions. [2021-05-03 14:32:20,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:32:20,676 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:20,676 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:20,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1255 [2021-05-03 14:32:20,877 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:20,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:20,877 INFO L82 PathProgramCache]: Analyzing trace with hash 154074396, now seen corresponding path program 178 times [2021-05-03 14:32:20,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:20,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673510072] [2021-05-03 14:32:20,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:20,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:21,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673510072] [2021-05-03 14:32:21,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14131720] [2021-05-03 14:32:21,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:21,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:32:21,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:21,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:32:21,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:21,629 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:32:21,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:21,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:21,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:32:21,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088294783] [2021-05-03 14:32:21,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:32:21,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:21,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:32:21,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:32:21,870 INFO L87 Difference]: Start difference. First operand 137 states and 304 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:22,291 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2021-05-03 14:32:22,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:22,765 INFO L93 Difference]: Finished difference Result 205 states and 413 transitions. [2021-05-03 14:32:22,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:32:22,766 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:32:22,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:22,767 INFO L225 Difference]: With dead ends: 205 [2021-05-03 14:32:22,767 INFO L226 Difference]: Without dead ends: 183 [2021-05-03 14:32:22,767 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1234.3ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:32:22,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-03 14:32:22,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 136. [2021-05-03 14:32:22,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.237037037037037) internal successors, (302), 135 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:22,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 302 transitions. [2021-05-03 14:32:22,769 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 302 transitions. Word has length 18 [2021-05-03 14:32:22,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:22,769 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 302 transitions. [2021-05-03 14:32:22,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:22,769 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 302 transitions. [2021-05-03 14:32:22,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:32:22,769 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:22,769 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:22,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1266 [2021-05-03 14:32:22,970 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:22,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:22,970 INFO L82 PathProgramCache]: Analyzing trace with hash -2125796294, now seen corresponding path program 179 times [2021-05-03 14:32:22,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:22,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199964868] [2021-05-03 14:32:22,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:23,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199964868] [2021-05-03 14:32:23,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638819005] [2021-05-03 14:32:23,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:23,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:32:23,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:23,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:32:23,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:23,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:23,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:32:23,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932186957] [2021-05-03 14:32:23,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:32:23,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:23,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:32:23,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:32:23,899 INFO L87 Difference]: Start difference. First operand 136 states and 302 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:24,229 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2021-05-03 14:32:24,450 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2021-05-03 14:32:24,671 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-05-03 14:32:24,819 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-05-03 14:32:24,959 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-05-03 14:32:25,225 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-05-03 14:32:25,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:25,275 INFO L93 Difference]: Finished difference Result 180 states and 378 transitions. [2021-05-03 14:32:25,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:32:25,276 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:32:25,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:25,277 INFO L225 Difference]: With dead ends: 180 [2021-05-03 14:32:25,277 INFO L226 Difference]: Without dead ends: 166 [2021-05-03 14:32:25,277 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1742.8ms TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:32:25,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-03 14:32:25,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 139. [2021-05-03 14:32:25,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.239130434782609) internal successors, (309), 138 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:25,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 309 transitions. [2021-05-03 14:32:25,280 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 309 transitions. Word has length 18 [2021-05-03 14:32:25,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:25,280 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 309 transitions. [2021-05-03 14:32:25,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:25,280 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 309 transitions. [2021-05-03 14:32:25,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:32:25,280 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:25,280 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:25,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1278,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:25,497 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:25,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:25,497 INFO L82 PathProgramCache]: Analyzing trace with hash -791204964, now seen corresponding path program 180 times [2021-05-03 14:32:25,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:25,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369034146] [2021-05-03 14:32:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:25,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:25,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369034146] [2021-05-03 14:32:25,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770318025] [2021-05-03 14:32:25,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:25,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:32:25,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:25,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:32:25,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:26,202 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:32:26,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:26,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:26,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:32:26,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238938268] [2021-05-03 14:32:26,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:32:26,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:26,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:32:26,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:32:26,371 INFO L87 Difference]: Start difference. First operand 139 states and 309 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:26,766 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-05-03 14:32:27,107 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-05-03 14:32:27,340 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-05-03 14:32:27,528 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-05-03 14:32:27,809 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-05-03 14:32:27,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:27,837 INFO L93 Difference]: Finished difference Result 220 states and 436 transitions. [2021-05-03 14:32:27,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:32:27,838 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:32:27,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:27,838 INFO L225 Difference]: With dead ends: 220 [2021-05-03 14:32:27,838 INFO L226 Difference]: Without dead ends: 197 [2021-05-03 14:32:27,839 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1717.1ms TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:32:27,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-03 14:32:27,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 140. [2021-05-03 14:32:27,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.2302158273381294) internal successors, (310), 139 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:27,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 310 transitions. [2021-05-03 14:32:27,840 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 310 transitions. Word has length 18 [2021-05-03 14:32:27,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:27,840 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 310 transitions. [2021-05-03 14:32:27,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:27,841 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 310 transitions. [2021-05-03 14:32:27,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:32:27,841 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:27,841 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:28,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1291,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:28,041 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:28,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:28,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1329060542, now seen corresponding path program 181 times [2021-05-03 14:32:28,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:28,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649707472] [2021-05-03 14:32:28,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:28,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649707472] [2021-05-03 14:32:28,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048966863] [2021-05-03 14:32:28,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:28,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:32:28,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:28,795 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:32:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:29,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:29,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:32:29,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270839476] [2021-05-03 14:32:29,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:32:29,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:29,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:32:29,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:32:29,043 INFO L87 Difference]: Start difference. First operand 140 states and 310 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:29,315 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-05-03 14:32:29,651 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-05-03 14:32:30,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:30,138 INFO L93 Difference]: Finished difference Result 206 states and 415 transitions. [2021-05-03 14:32:30,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:32:30,139 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:32:30,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:30,139 INFO L225 Difference]: With dead ends: 206 [2021-05-03 14:32:30,139 INFO L226 Difference]: Without dead ends: 184 [2021-05-03 14:32:30,140 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1430.8ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:32:30,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-05-03 14:32:30,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 140. [2021-05-03 14:32:30,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.2302158273381294) internal successors, (310), 139 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:30,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 310 transitions. [2021-05-03 14:32:30,141 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 310 transitions. Word has length 18 [2021-05-03 14:32:30,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:30,141 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 310 transitions. [2021-05-03 14:32:30,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:30,142 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 310 transitions. [2021-05-03 14:32:30,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:32:30,142 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:30,142 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:30,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1304,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:30,342 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:30,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:30,343 INFO L82 PathProgramCache]: Analyzing trace with hash -822714276, now seen corresponding path program 182 times [2021-05-03 14:32:30,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:30,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108696232] [2021-05-03 14:32:30,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:30,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108696232] [2021-05-03 14:32:30,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402623213] [2021-05-03 14:32:30,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:30,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:32:30,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:30,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-03 14:32:30,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:31,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:31,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:32:31,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786133887] [2021-05-03 14:32:31,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:32:31,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:31,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:32:31,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:32:31,225 INFO L87 Difference]: Start difference. First operand 140 states and 310 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:31,861 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2021-05-03 14:32:32,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:32,516 INFO L93 Difference]: Finished difference Result 210 states and 423 transitions. [2021-05-03 14:32:32,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:32:32,517 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:32:32,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:32,517 INFO L225 Difference]: With dead ends: 210 [2021-05-03 14:32:32,517 INFO L226 Difference]: Without dead ends: 185 [2021-05-03 14:32:32,517 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1457.9ms TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:32:32,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-03 14:32:32,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 141. [2021-05-03 14:32:32,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.2285714285714286) internal successors, (312), 140 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:32,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 312 transitions. [2021-05-03 14:32:32,519 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 312 transitions. Word has length 18 [2021-05-03 14:32:32,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:32,519 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 312 transitions. [2021-05-03 14:32:32,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:32,519 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 312 transitions. [2021-05-03 14:32:32,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:32:32,519 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:32,519 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:32,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1316 [2021-05-03 14:32:32,720 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:32,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:32,720 INFO L82 PathProgramCache]: Analyzing trace with hash -858339116, now seen corresponding path program 183 times [2021-05-03 14:32:32,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:32,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265691438] [2021-05-03 14:32:32,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:33,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265691438] [2021-05-03 14:32:33,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528280232] [2021-05-03 14:32:33,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:33,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:32:33,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:33,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-03 14:32:33,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:33,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:33,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:32:33,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108050283] [2021-05-03 14:32:33,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:32:33,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:33,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:32:33,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:32:33,715 INFO L87 Difference]: Start difference. First operand 141 states and 312 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:34,624 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2021-05-03 14:32:34,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:34,801 INFO L93 Difference]: Finished difference Result 186 states and 388 transitions. [2021-05-03 14:32:34,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:32:34,802 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:32:34,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:34,803 INFO L225 Difference]: With dead ends: 186 [2021-05-03 14:32:34,803 INFO L226 Difference]: Without dead ends: 168 [2021-05-03 14:32:34,803 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1488.7ms TimeCoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:32:34,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-03 14:32:34,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 145. [2021-05-03 14:32:34,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.2222222222222223) internal successors, (320), 144 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:34,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 320 transitions. [2021-05-03 14:32:34,805 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 320 transitions. Word has length 18 [2021-05-03 14:32:34,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:34,805 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 320 transitions. [2021-05-03 14:32:34,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:34,805 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 320 transitions. [2021-05-03 14:32:34,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:32:34,805 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:34,805 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:35,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1327,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:35,006 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:35,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:35,006 INFO L82 PathProgramCache]: Analyzing trace with hash 476252214, now seen corresponding path program 184 times [2021-05-03 14:32:35,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:35,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689130638] [2021-05-03 14:32:35,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:35,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:35,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689130638] [2021-05-03 14:32:35,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999653038] [2021-05-03 14:32:35,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:35,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:32:35,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:35,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:32:35,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:35,759 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:32:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:35,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:35,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:32:35,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428415522] [2021-05-03 14:32:35,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:32:35,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:35,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:32:35,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:32:35,948 INFO L87 Difference]: Start difference. First operand 145 states and 320 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:36,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:36,940 INFO L93 Difference]: Finished difference Result 194 states and 398 transitions. [2021-05-03 14:32:36,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:32:36,941 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:32:36,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:36,941 INFO L225 Difference]: With dead ends: 194 [2021-05-03 14:32:36,941 INFO L226 Difference]: Without dead ends: 168 [2021-05-03 14:32:36,941 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1317.3ms TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:32:36,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-03 14:32:36,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 146. [2021-05-03 14:32:36,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.220689655172414) internal successors, (322), 145 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:36,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 322 transitions. [2021-05-03 14:32:36,943 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 322 transitions. Word has length 18 [2021-05-03 14:32:36,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:36,943 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 322 transitions. [2021-05-03 14:32:36,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:36,943 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 322 transitions. [2021-05-03 14:32:36,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:32:36,943 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:36,943 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:37,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1341 [2021-05-03 14:32:37,144 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:37,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:37,144 INFO L82 PathProgramCache]: Analyzing trace with hash -61603364, now seen corresponding path program 185 times [2021-05-03 14:32:37,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:37,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071317800] [2021-05-03 14:32:37,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:37,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071317800] [2021-05-03 14:32:37,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841292766] [2021-05-03 14:32:37,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:37,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:32:37,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:37,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:32:37,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:38,006 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:32:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:38,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:38,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:32:38,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369429184] [2021-05-03 14:32:38,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:32:38,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:38,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:32:38,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:32:38,261 INFO L87 Difference]: Start difference. First operand 146 states and 322 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:38,518 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-05-03 14:32:38,885 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 31 [2021-05-03 14:32:39,301 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-05-03 14:32:39,535 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 34 [2021-05-03 14:32:39,811 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-05-03 14:32:39,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:39,841 INFO L93 Difference]: Finished difference Result 226 states and 450 transitions. [2021-05-03 14:32:39,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:32:39,842 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:32:39,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:39,842 INFO L225 Difference]: With dead ends: 226 [2021-05-03 14:32:39,843 INFO L226 Difference]: Without dead ends: 204 [2021-05-03 14:32:39,843 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2087.5ms TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:32:39,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-03 14:32:39,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 146. [2021-05-03 14:32:39,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.220689655172414) internal successors, (322), 145 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:39,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 322 transitions. [2021-05-03 14:32:39,845 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 322 transitions. Word has length 18 [2021-05-03 14:32:39,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:39,846 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 322 transitions. [2021-05-03 14:32:39,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:39,846 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 322 transitions. [2021-05-03 14:32:39,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:32:39,846 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:39,846 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:40,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1354 [2021-05-03 14:32:40,072 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:40,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:40,072 INFO L82 PathProgramCache]: Analyzing trace with hash 444742902, now seen corresponding path program 186 times [2021-05-03 14:32:40,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:40,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584109161] [2021-05-03 14:32:40,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:40,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584109161] [2021-05-03 14:32:40,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523124757] [2021-05-03 14:32:40,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:40,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:32:40,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:40,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:32:40,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:40,777 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:32:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:41,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:41,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:32:41,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203400939] [2021-05-03 14:32:41,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:32:41,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:41,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:32:41,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:32:41,116 INFO L87 Difference]: Start difference. First operand 146 states and 322 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:41,406 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-05-03 14:32:41,572 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-05-03 14:32:42,252 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-05-03 14:32:42,383 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 29 [2021-05-03 14:32:42,785 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 37 [2021-05-03 14:32:43,290 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2021-05-03 14:32:43,689 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 31 [2021-05-03 14:32:43,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:43,891 INFO L93 Difference]: Finished difference Result 262 states and 514 transitions. [2021-05-03 14:32:43,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:32:43,892 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:32:43,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:43,893 INFO L225 Difference]: With dead ends: 262 [2021-05-03 14:32:43,893 INFO L226 Difference]: Without dead ends: 190 [2021-05-03 14:32:43,893 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 3080.5ms TimeCoverageRelationStatistics Valid=326, Invalid=1744, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 14:32:43,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-03 14:32:43,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 149. [2021-05-03 14:32:43,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.222972972972973) internal successors, (329), 148 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:43,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 329 transitions. [2021-05-03 14:32:43,895 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 329 transitions. Word has length 18 [2021-05-03 14:32:43,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:43,895 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 329 transitions. [2021-05-03 14:32:43,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:43,895 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 329 transitions. [2021-05-03 14:32:43,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:32:43,896 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:43,896 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:44,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1366,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:44,101 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:44,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:44,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1038392036, now seen corresponding path program 187 times [2021-05-03 14:32:44,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:44,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206052440] [2021-05-03 14:32:44,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:44,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:44,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206052440] [2021-05-03 14:32:44,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232337855] [2021-05-03 14:32:44,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:44,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:32:44,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:44,963 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-05-03 14:32:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:45,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:45,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:32:45,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241645582] [2021-05-03 14:32:45,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:32:45,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:45,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:32:45,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:32:45,444 INFO L87 Difference]: Start difference. First operand 149 states and 329 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:45,743 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-05-03 14:32:45,933 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-05-03 14:32:46,200 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-05-03 14:32:46,390 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-05-03 14:32:47,167 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 34 [2021-05-03 14:32:47,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:47,464 INFO L93 Difference]: Finished difference Result 233 states and 463 transitions. [2021-05-03 14:32:47,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:32:47,465 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:32:47,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:47,465 INFO L225 Difference]: With dead ends: 233 [2021-05-03 14:32:47,465 INFO L226 Difference]: Without dead ends: 195 [2021-05-03 14:32:47,466 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2653.3ms TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 14:32:47,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-03 14:32:47,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 150. [2021-05-03 14:32:47,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.221476510067114) internal successors, (331), 149 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:47,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 331 transitions. [2021-05-03 14:32:47,468 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 331 transitions. Word has length 18 [2021-05-03 14:32:47,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:47,468 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 331 transitions. [2021-05-03 14:32:47,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:47,468 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 331 transitions. [2021-05-03 14:32:47,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:32:47,469 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:47,469 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:47,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1377 [2021-05-03 14:32:47,673 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:47,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:47,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1142907740, now seen corresponding path program 188 times [2021-05-03 14:32:47,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:47,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071767505] [2021-05-03 14:32:47,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:47,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071767505] [2021-05-03 14:32:47,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737210536] [2021-05-03 14:32:47,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:47,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:32:47,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:47,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-03 14:32:47,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:48,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:48,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:32:48,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816027390] [2021-05-03 14:32:48,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:32:48,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:48,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:32:48,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:32:48,576 INFO L87 Difference]: Start difference. First operand 150 states and 331 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:49,006 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-05-03 14:32:49,173 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 28 [2021-05-03 14:32:49,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:49,346 INFO L93 Difference]: Finished difference Result 168 states and 357 transitions. [2021-05-03 14:32:49,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:32:49,348 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:32:49,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:49,348 INFO L225 Difference]: With dead ends: 168 [2021-05-03 14:32:49,348 INFO L226 Difference]: Without dead ends: 153 [2021-05-03 14:32:49,348 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1261.7ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:32:49,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-03 14:32:49,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2021-05-03 14:32:49,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.22) internal successors, (333), 150 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:49,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 333 transitions. [2021-05-03 14:32:49,350 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 333 transitions. Word has length 18 [2021-05-03 14:32:49,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:49,350 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 333 transitions. [2021-05-03 14:32:49,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:49,350 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 333 transitions. [2021-05-03 14:32:49,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:32:49,351 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:49,351 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:49,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1388,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:49,551 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:49,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:49,551 INFO L82 PathProgramCache]: Analyzing trace with hash -510045634, now seen corresponding path program 189 times [2021-05-03 14:32:49,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:49,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372625417] [2021-05-03 14:32:49,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:49,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:49,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372625417] [2021-05-03 14:32:49,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801984833] [2021-05-03 14:32:49,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:49,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:32:49,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:49,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:32:49,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:50,212 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-05-03 14:32:50,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:50,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:50,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:32:50,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292964434] [2021-05-03 14:32:50,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:32:50,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:50,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:32:50,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:32:50,630 INFO L87 Difference]: Start difference. First operand 151 states and 333 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:50,907 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-05-03 14:32:51,217 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-05-03 14:32:51,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:51,830 INFO L93 Difference]: Finished difference Result 187 states and 396 transitions. [2021-05-03 14:32:51,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:32:51,831 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:32:51,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:51,831 INFO L225 Difference]: With dead ends: 187 [2021-05-03 14:32:51,831 INFO L226 Difference]: Without dead ends: 174 [2021-05-03 14:32:51,831 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1675.5ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:32:51,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-03 14:32:51,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 152. [2021-05-03 14:32:51,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.218543046357616) internal successors, (335), 151 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:51,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 335 transitions. [2021-05-03 14:32:51,833 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 335 transitions. Word has length 18 [2021-05-03 14:32:51,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:51,833 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 335 transitions. [2021-05-03 14:32:51,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:51,833 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 335 transitions. [2021-05-03 14:32:51,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:32:51,833 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:51,834 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:52,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1402 [2021-05-03 14:32:52,034 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:52,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:52,034 INFO L82 PathProgramCache]: Analyzing trace with hash -2087387364, now seen corresponding path program 190 times [2021-05-03 14:32:52,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:52,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890006204] [2021-05-03 14:32:52,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:52,438 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-03 14:32:52,581 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 28 [2021-05-03 14:32:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:52,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890006204] [2021-05-03 14:32:52,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092308855] [2021-05-03 14:32:52,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:52,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:32:52,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:52,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:32:52,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:53,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:53,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:32:53,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857577719] [2021-05-03 14:32:53,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:32:53,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:53,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:32:53,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:32:53,403 INFO L87 Difference]: Start difference. First operand 152 states and 335 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:53,705 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-05-03 14:32:53,859 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-05-03 14:32:54,036 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-05-03 14:32:54,274 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-05-03 14:32:54,434 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-05-03 14:32:54,784 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-05-03 14:32:55,128 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-05-03 14:32:55,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:55,155 INFO L93 Difference]: Finished difference Result 192 states and 397 transitions. [2021-05-03 14:32:55,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:32:55,156 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:32:55,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:55,157 INFO L225 Difference]: With dead ends: 192 [2021-05-03 14:32:55,157 INFO L226 Difference]: Without dead ends: 181 [2021-05-03 14:32:55,157 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2513.4ms TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:32:55,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-03 14:32:55,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 153. [2021-05-03 14:32:55,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.2171052631578947) internal successors, (337), 152 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:55,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 337 transitions. [2021-05-03 14:32:55,159 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 337 transitions. Word has length 18 [2021-05-03 14:32:55,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:55,159 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 337 transitions. [2021-05-03 14:32:55,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:55,159 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 337 transitions. [2021-05-03 14:32:55,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:32:55,159 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:55,159 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:55,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1414,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:55,361 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:55,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:55,361 INFO L82 PathProgramCache]: Analyzing trace with hash -752796034, now seen corresponding path program 191 times [2021-05-03 14:32:55,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:55,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616903159] [2021-05-03 14:32:55,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:55,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616903159] [2021-05-03 14:32:55,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576921474] [2021-05-03 14:32:55,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:55,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:32:55,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:55,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:32:55,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:56,041 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-05-03 14:32:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:56,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:56,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:32:56,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007056990] [2021-05-03 14:32:56,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:32:56,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:56,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:32:56,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:32:56,488 INFO L87 Difference]: Start difference. First operand 153 states and 337 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:56,729 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-05-03 14:32:56,892 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-05-03 14:32:57,082 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2021-05-03 14:32:57,709 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-05-03 14:32:57,899 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-05-03 14:32:57,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:57,915 INFO L93 Difference]: Finished difference Result 202 states and 415 transitions. [2021-05-03 14:32:57,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:32:57,917 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:32:57,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:57,917 INFO L225 Difference]: With dead ends: 202 [2021-05-03 14:32:57,917 INFO L226 Difference]: Without dead ends: 176 [2021-05-03 14:32:57,917 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1954.3ms TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:32:57,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-03 14:32:57,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 152. [2021-05-03 14:32:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.218543046357616) internal successors, (335), 151 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:57,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 335 transitions. [2021-05-03 14:32:57,919 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 335 transitions. Word has length 18 [2021-05-03 14:32:57,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:57,919 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 335 transitions. [2021-05-03 14:32:57,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:57,919 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 335 transitions. [2021-05-03 14:32:57,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:32:57,919 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:57,920 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:58,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1425,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:58,120 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:58,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:58,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1993180572, now seen corresponding path program 192 times [2021-05-03 14:32:58,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:58,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777982227] [2021-05-03 14:32:58,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:58,483 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 28 [2021-05-03 14:32:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:58,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777982227] [2021-05-03 14:32:58,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245207408] [2021-05-03 14:32:58,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:58,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:32:58,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:58,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 14:32:58,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:59,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:59,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:32:59,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416064835] [2021-05-03 14:32:59,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:32:59,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:59,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:32:59,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:32:59,231 INFO L87 Difference]: Start difference. First operand 152 states and 335 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:59,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:59,983 INFO L93 Difference]: Finished difference Result 169 states and 360 transitions. [2021-05-03 14:32:59,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:32:59,984 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:32:59,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:59,985 INFO L225 Difference]: With dead ends: 169 [2021-05-03 14:32:59,985 INFO L226 Difference]: Without dead ends: 156 [2021-05-03 14:32:59,985 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1384.4ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:32:59,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-03 14:32:59,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2021-05-03 14:32:59,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.215686274509804) internal successors, (339), 153 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 339 transitions. [2021-05-03 14:32:59,987 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 339 transitions. Word has length 18 [2021-05-03 14:32:59,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:59,987 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 339 transitions. [2021-05-03 14:32:59,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:59,987 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 339 transitions. [2021-05-03 14:32:59,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:32:59,987 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:59,987 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:00,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1438 [2021-05-03 14:33:00,188 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:00,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:00,188 INFO L82 PathProgramCache]: Analyzing trace with hash 724444994, now seen corresponding path program 193 times [2021-05-03 14:33:00,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:00,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814358560] [2021-05-03 14:33:00,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:00,579 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 33 [2021-05-03 14:33:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:00,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814358560] [2021-05-03 14:33:00,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986364259] [2021-05-03 14:33:00,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:00,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:00,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:33:00,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:01,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:01,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:33:01,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666918366] [2021-05-03 14:33:01,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:33:01,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:01,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:33:01,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:33:01,359 INFO L87 Difference]: Start difference. First operand 154 states and 339 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:01,938 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-05-03 14:33:02,099 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-05-03 14:33:02,309 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-05-03 14:33:02,513 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-05-03 14:33:02,730 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2021-05-03 14:33:02,928 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-05-03 14:33:03,238 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-05-03 14:33:03,409 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-05-03 14:33:03,635 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-05-03 14:33:03,795 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 28 [2021-05-03 14:33:04,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:04,209 INFO L93 Difference]: Finished difference Result 250 states and 492 transitions. [2021-05-03 14:33:04,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:33:04,210 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:33:04,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:04,211 INFO L225 Difference]: With dead ends: 250 [2021-05-03 14:33:04,211 INFO L226 Difference]: Without dead ends: 232 [2021-05-03 14:33:04,211 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 3279.8ms TimeCoverageRelationStatistics Valid=207, Invalid=1353, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 14:33:04,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-03 14:33:04,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 155. [2021-05-03 14:33:04,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.2142857142857144) internal successors, (341), 154 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:04,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 341 transitions. [2021-05-03 14:33:04,214 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 341 transitions. Word has length 18 [2021-05-03 14:33:04,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:04,214 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 341 transitions. [2021-05-03 14:33:04,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:04,215 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 341 transitions. [2021-05-03 14:33:04,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:04,215 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:04,215 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:04,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1452 [2021-05-03 14:33:04,425 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:04,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:04,425 INFO L82 PathProgramCache]: Analyzing trace with hash 2059036324, now seen corresponding path program 194 times [2021-05-03 14:33:04,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:04,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022223687] [2021-05-03 14:33:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:04,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:04,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022223687] [2021-05-03 14:33:04,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824285210] [2021-05-03 14:33:04,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:04,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:33:04,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:04,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:33:04,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:05,138 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:33:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:05,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:05,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:33:05,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750871726] [2021-05-03 14:33:05,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:33:05,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:05,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:33:05,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:33:05,473 INFO L87 Difference]: Start difference. First operand 155 states and 341 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:05,741 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-05-03 14:33:05,912 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-05-03 14:33:06,130 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-05-03 14:33:06,684 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-05-03 14:33:06,880 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-05-03 14:33:06,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:06,894 INFO L93 Difference]: Finished difference Result 203 states and 417 transitions. [2021-05-03 14:33:06,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:33:06,895 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:33:06,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:06,896 INFO L225 Difference]: With dead ends: 203 [2021-05-03 14:33:06,896 INFO L226 Difference]: Without dead ends: 177 [2021-05-03 14:33:06,896 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1868.0ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:33:06,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-03 14:33:06,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 156. [2021-05-03 14:33:06,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.2129032258064516) internal successors, (343), 155 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:06,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 343 transitions. [2021-05-03 14:33:06,898 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 343 transitions. Word has length 18 [2021-05-03 14:33:06,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:06,898 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 343 transitions. [2021-05-03 14:33:06,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:06,898 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 343 transitions. [2021-05-03 14:33:06,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:06,898 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:06,898 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:07,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1465 [2021-05-03 14:33:07,099 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:07,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:07,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1230791260, now seen corresponding path program 195 times [2021-05-03 14:33:07,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:07,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136925722] [2021-05-03 14:33:07,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:07,557 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 28 [2021-05-03 14:33:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:07,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136925722] [2021-05-03 14:33:07,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998500810] [2021-05-03 14:33:07,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:07,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:33:07,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:07,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:33:07,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:08,250 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-05-03 14:33:08,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:08,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:08,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:33:08,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773977387] [2021-05-03 14:33:08,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:33:08,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:08,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:33:08,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:33:08,483 INFO L87 Difference]: Start difference. First operand 156 states and 343 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:08,761 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-05-03 14:33:09,095 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-05-03 14:33:09,295 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2021-05-03 14:33:09,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:09,558 INFO L93 Difference]: Finished difference Result 187 states and 395 transitions. [2021-05-03 14:33:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:33:09,559 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:33:09,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:09,559 INFO L225 Difference]: With dead ends: 187 [2021-05-03 14:33:09,559 INFO L226 Difference]: Without dead ends: 176 [2021-05-03 14:33:09,560 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1883.5ms TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:33:09,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-03 14:33:09,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 158. [2021-05-03 14:33:09,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.210191082802548) internal successors, (347), 157 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:09,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 347 transitions. [2021-05-03 14:33:09,561 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 347 transitions. Word has length 18 [2021-05-03 14:33:09,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:09,561 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 347 transitions. [2021-05-03 14:33:09,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:09,562 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 347 transitions. [2021-05-03 14:33:09,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:09,562 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:09,562 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:09,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1478 [2021-05-03 14:33:09,762 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:09,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:09,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1729584706, now seen corresponding path program 196 times [2021-05-03 14:33:09,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:09,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143774021] [2021-05-03 14:33:09,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:10,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:10,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143774021] [2021-05-03 14:33:10,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014531391] [2021-05-03 14:33:10,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:10,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:33:10,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:10,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:33:10,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:10,516 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:33:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:10,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:10,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:33:10,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38667029] [2021-05-03 14:33:10,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:33:10,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:10,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:33:10,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:33:10,712 INFO L87 Difference]: Start difference. First operand 158 states and 347 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:11,142 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-05-03 14:33:11,752 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-05-03 14:33:12,148 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-05-03 14:33:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:12,170 INFO L93 Difference]: Finished difference Result 219 states and 443 transitions. [2021-05-03 14:33:12,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:33:12,171 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:33:12,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:12,172 INFO L225 Difference]: With dead ends: 219 [2021-05-03 14:33:12,172 INFO L226 Difference]: Without dead ends: 193 [2021-05-03 14:33:12,172 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1814.0ms TimeCoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:33:12,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-03 14:33:12,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 157. [2021-05-03 14:33:12,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.2115384615384617) internal successors, (345), 156 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:12,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 345 transitions. [2021-05-03 14:33:12,174 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 345 transitions. Word has length 18 [2021-05-03 14:33:12,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:12,174 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 345 transitions. [2021-05-03 14:33:12,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:12,174 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 345 transitions. [2021-05-03 14:33:12,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:12,174 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:12,174 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:12,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1488 [2021-05-03 14:33:12,375 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:12,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:12,375 INFO L82 PathProgramCache]: Analyzing trace with hash 2027527012, now seen corresponding path program 197 times [2021-05-03 14:33:12,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:12,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850400019] [2021-05-03 14:33:12,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:12,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850400019] [2021-05-03 14:33:12,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329254627] [2021-05-03 14:33:12,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:12,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:33:12,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:12,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:33:12,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:13,244 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:33:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:13,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:13,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:33:13,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138173801] [2021-05-03 14:33:13,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:33:13,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:13,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:33:13,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:33:13,503 INFO L87 Difference]: Start difference. First operand 157 states and 345 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:14,246 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-05-03 14:33:15,468 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-05-03 14:33:15,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:15,473 INFO L93 Difference]: Finished difference Result 237 states and 478 transitions. [2021-05-03 14:33:15,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:33:15,474 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:33:15,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:15,475 INFO L225 Difference]: With dead ends: 237 [2021-05-03 14:33:15,475 INFO L226 Difference]: Without dead ends: 200 [2021-05-03 14:33:15,475 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 2346.8ms TimeCoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 14:33:15,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-03 14:33:15,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 160. [2021-05-03 14:33:15,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.2264150943396226) internal successors, (354), 159 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:15,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 354 transitions. [2021-05-03 14:33:15,477 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 354 transitions. Word has length 18 [2021-05-03 14:33:15,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:15,477 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 354 transitions. [2021-05-03 14:33:15,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:15,477 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 354 transitions. [2021-05-03 14:33:15,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:15,478 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:15,478 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:15,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1501 [2021-05-03 14:33:15,678 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:15,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:15,679 INFO L82 PathProgramCache]: Analyzing trace with hash -725723394, now seen corresponding path program 198 times [2021-05-03 14:33:15,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:15,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17616575] [2021-05-03 14:33:15,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:16,123 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:16,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17616575] [2021-05-03 14:33:16,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245284138] [2021-05-03 14:33:16,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:16,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:33:16,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:16,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:33:16,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:16,562 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:33:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:16,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:16,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:33:16,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203663945] [2021-05-03 14:33:16,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:33:16,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:16,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:33:16,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:33:16,909 INFO L87 Difference]: Start difference. First operand 160 states and 354 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:17,134 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-05-03 14:33:17,422 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2021-05-03 14:33:17,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:17,629 INFO L93 Difference]: Finished difference Result 176 states and 377 transitions. [2021-05-03 14:33:17,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:33:17,629 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:33:17,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:17,630 INFO L225 Difference]: With dead ends: 176 [2021-05-03 14:33:17,630 INFO L226 Difference]: Without dead ends: 163 [2021-05-03 14:33:17,630 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1442.8ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:33:17,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-03 14:33:17,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2021-05-03 14:33:17,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.225) internal successors, (356), 160 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:17,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 356 transitions. [2021-05-03 14:33:17,632 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 356 transitions. Word has length 18 [2021-05-03 14:33:17,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:17,632 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 356 transitions. [2021-05-03 14:33:17,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:17,632 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 356 transitions. [2021-05-03 14:33:17,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:17,632 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:17,632 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:17,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1512,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:17,833 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:17,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:17,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1991902172, now seen corresponding path program 199 times [2021-05-03 14:33:17,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:17,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584239995] [2021-05-03 14:33:17,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:18,213 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-03 14:33:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:18,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584239995] [2021-05-03 14:33:18,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039130203] [2021-05-03 14:33:18,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:18,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:18,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:33:18,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:18,886 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:33:19,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:19,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:19,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:33:19,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699169338] [2021-05-03 14:33:19,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:33:19,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:19,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:33:19,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:33:19,289 INFO L87 Difference]: Start difference. First operand 161 states and 356 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:19,523 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-05-03 14:33:19,694 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-05-03 14:33:19,929 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-05-03 14:33:20,203 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2021-05-03 14:33:20,355 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-05-03 14:33:20,725 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2021-05-03 14:33:21,142 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-05-03 14:33:21,304 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-05-03 14:33:21,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:21,326 INFO L93 Difference]: Finished difference Result 212 states and 434 transitions. [2021-05-03 14:33:21,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:33:21,328 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:33:21,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:21,328 INFO L225 Difference]: With dead ends: 212 [2021-05-03 14:33:21,328 INFO L226 Difference]: Without dead ends: 201 [2021-05-03 14:33:21,329 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 2731.7ms TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:33:21,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-03 14:33:21,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 162. [2021-05-03 14:33:21,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.2236024844720497) internal successors, (358), 161 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 358 transitions. [2021-05-03 14:33:21,331 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 358 transitions. Word has length 18 [2021-05-03 14:33:21,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:21,332 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 358 transitions. [2021-05-03 14:33:21,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:21,332 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 358 transitions. [2021-05-03 14:33:21,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:21,332 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:21,332 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:21,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1524 [2021-05-03 14:33:21,549 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:21,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:21,549 INFO L82 PathProgramCache]: Analyzing trace with hash -968473794, now seen corresponding path program 200 times [2021-05-03 14:33:21,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:21,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287554938] [2021-05-03 14:33:21,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:21,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287554938] [2021-05-03 14:33:21,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164795907] [2021-05-03 14:33:21,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:21,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:33:21,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:21,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:33:21,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:22,303 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:33:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:22,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:22,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:33:22,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446753568] [2021-05-03 14:33:22,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:33:22,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:22,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:33:22,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:33:22,665 INFO L87 Difference]: Start difference. First operand 162 states and 358 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:22,898 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-03 14:33:23,266 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-05-03 14:33:23,833 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-05-03 14:33:24,352 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-05-03 14:33:24,508 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-05-03 14:33:24,759 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-05-03 14:33:24,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:24,785 INFO L93 Difference]: Finished difference Result 234 states and 475 transitions. [2021-05-03 14:33:24,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:33:24,786 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:33:24,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:24,786 INFO L225 Difference]: With dead ends: 234 [2021-05-03 14:33:24,786 INFO L226 Difference]: Without dead ends: 208 [2021-05-03 14:33:24,787 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2434.2ms TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:33:24,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-03 14:33:24,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 160. [2021-05-03 14:33:24,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.2264150943396226) internal successors, (354), 159 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:24,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 354 transitions. [2021-05-03 14:33:24,788 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 354 transitions. Word has length 18 [2021-05-03 14:33:24,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:24,789 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 354 transitions. [2021-05-03 14:33:24,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:24,789 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 354 transitions. [2021-05-03 14:33:24,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:24,789 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:24,789 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:24,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1536,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:24,989 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:24,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:24,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1796718858, now seen corresponding path program 201 times [2021-05-03 14:33:24,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:24,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202519384] [2021-05-03 14:33:24,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:25,454 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 33 [2021-05-03 14:33:25,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:25,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202519384] [2021-05-03 14:33:25,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171597018] [2021-05-03 14:33:25,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:25,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:33:25,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:25,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-03 14:33:25,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:26,032 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:33:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:26,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:26,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:33:26,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484130345] [2021-05-03 14:33:26,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:33:26,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:26,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:33:26,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:33:26,349 INFO L87 Difference]: Start difference. First operand 160 states and 354 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:26,634 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-05-03 14:33:26,825 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-05-03 14:33:26,988 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-05-03 14:33:27,194 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-05-03 14:33:27,447 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2021-05-03 14:33:27,888 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-05-03 14:33:28,147 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2021-05-03 14:33:28,421 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-05-03 14:33:28,649 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-05-03 14:33:28,856 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-05-03 14:33:28,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:28,941 INFO L93 Difference]: Finished difference Result 249 states and 502 transitions. [2021-05-03 14:33:28,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:33:28,942 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:33:28,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:28,943 INFO L225 Difference]: With dead ends: 249 [2021-05-03 14:33:28,943 INFO L226 Difference]: Without dead ends: 231 [2021-05-03 14:33:28,943 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 3043.5ms TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:33:28,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-03 14:33:28,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 165. [2021-05-03 14:33:28,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.2378048780487805) internal successors, (367), 164 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:28,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 367 transitions. [2021-05-03 14:33:28,945 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 367 transitions. Word has length 18 [2021-05-03 14:33:28,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:28,945 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 367 transitions. [2021-05-03 14:33:28,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:28,945 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 367 transitions. [2021-05-03 14:33:28,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:28,945 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:28,945 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:29,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1549,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:29,146 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:29,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:29,147 INFO L82 PathProgramCache]: Analyzing trace with hash -462127528, now seen corresponding path program 202 times [2021-05-03 14:33:29,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:29,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438950909] [2021-05-03 14:33:29,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:29,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:29,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:29,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438950909] [2021-05-03 14:33:29,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440685407] [2021-05-03 14:33:29,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:29,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:33:29,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:29,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:33:29,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:29,949 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:33:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:30,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:30,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:33:30,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645242123] [2021-05-03 14:33:30,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:33:30,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:30,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:33:30,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:33:30,228 INFO L87 Difference]: Start difference. First operand 165 states and 367 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:30,511 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-05-03 14:33:30,799 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-05-03 14:33:31,004 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-05-03 14:33:31,195 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-05-03 14:33:31,469 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-05-03 14:33:31,806 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-05-03 14:33:31,989 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-05-03 14:33:32,148 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-05-03 14:33:32,656 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-05-03 14:33:32,892 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-05-03 14:33:33,158 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-05-03 14:33:33,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:33,190 INFO L93 Difference]: Finished difference Result 236 states and 482 transitions. [2021-05-03 14:33:33,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:33:33,191 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:33:33,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:33,192 INFO L225 Difference]: With dead ends: 236 [2021-05-03 14:33:33,192 INFO L226 Difference]: Without dead ends: 210 [2021-05-03 14:33:33,192 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 3137.3ms TimeCoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:33:33,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-03 14:33:33,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2021-05-03 14:33:33,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.2363636363636363) internal successors, (369), 165 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:33,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 369 transitions. [2021-05-03 14:33:33,195 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 369 transitions. Word has length 18 [2021-05-03 14:33:33,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:33,195 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 369 transitions. [2021-05-03 14:33:33,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:33,195 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 369 transitions. [2021-05-03 14:33:33,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:33,196 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:33,196 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:33,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1561 [2021-05-03 14:33:33,405 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:33,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:33,405 INFO L82 PathProgramCache]: Analyzing trace with hash -999983106, now seen corresponding path program 203 times [2021-05-03 14:33:33,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:33,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084205278] [2021-05-03 14:33:33,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:33,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:33,785 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-03 14:33:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:33,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084205278] [2021-05-03 14:33:33,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103593874] [2021-05-03 14:33:33,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:33,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:33:33,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:33,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:33:33,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:34,474 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:33:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:34,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:34,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:33:34,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868419080] [2021-05-03 14:33:34,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:33:34,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:34,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:33:34,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:33:34,788 INFO L87 Difference]: Start difference. First operand 166 states and 369 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:35,422 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-05-03 14:33:35,592 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 14:33:35,869 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 14:33:36,133 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-05-03 14:33:36,313 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-05-03 14:33:36,751 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-05-03 14:33:36,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:36,873 INFO L93 Difference]: Finished difference Result 264 states and 531 transitions. [2021-05-03 14:33:36,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:33:36,874 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:33:36,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:36,875 INFO L225 Difference]: With dead ends: 264 [2021-05-03 14:33:36,875 INFO L226 Difference]: Without dead ends: 224 [2021-05-03 14:33:36,875 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2564.8ms TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:33:36,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-03 14:33:36,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 168. [2021-05-03 14:33:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2395209580838324) internal successors, (374), 167 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:36,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 374 transitions. [2021-05-03 14:33:36,877 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 374 transitions. Word has length 18 [2021-05-03 14:33:36,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:36,877 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 374 transitions. [2021-05-03 14:33:36,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:36,877 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 374 transitions. [2021-05-03 14:33:36,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:36,878 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:36,878 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:37,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1574 [2021-05-03 14:33:37,078 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:37,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:37,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1015113500, now seen corresponding path program 204 times [2021-05-03 14:33:37,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:37,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363666646] [2021-05-03 14:33:37,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:37,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363666646] [2021-05-03 14:33:37,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136146502] [2021-05-03 14:33:37,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:37,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:33:37,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:37,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:33:37,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:37,965 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:33:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:38,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:38,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:33:38,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615444720] [2021-05-03 14:33:38,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:33:38,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:38,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:33:38,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:33:38,270 INFO L87 Difference]: Start difference. First operand 168 states and 374 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:38,490 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-03 14:33:38,685 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-05-03 14:33:38,917 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-05-03 14:33:39,214 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2021-05-03 14:33:39,384 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-05-03 14:33:39,672 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-05-03 14:33:39,908 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-05-03 14:33:40,126 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-05-03 14:33:40,293 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-05-03 14:33:40,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:40,332 INFO L93 Difference]: Finished difference Result 217 states and 458 transitions. [2021-05-03 14:33:40,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:33:40,334 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:33:40,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:40,334 INFO L225 Difference]: With dead ends: 217 [2021-05-03 14:33:40,334 INFO L226 Difference]: Without dead ends: 206 [2021-05-03 14:33:40,334 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2418.2ms TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:33:40,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-03 14:33:40,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 171. [2021-05-03 14:33:40,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.235294117647059) internal successors, (380), 170 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:40,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 380 transitions. [2021-05-03 14:33:40,336 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 380 transitions. Word has length 18 [2021-05-03 14:33:40,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:40,337 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 380 transitions. [2021-05-03 14:33:40,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:40,337 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 380 transitions. [2021-05-03 14:33:40,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:40,337 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:40,337 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:40,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1586,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:40,538 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:40,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:40,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1945262466, now seen corresponding path program 205 times [2021-05-03 14:33:40,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:40,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131628832] [2021-05-03 14:33:40,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:40,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131628832] [2021-05-03 14:33:40,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103780717] [2021-05-03 14:33:40,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:40,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:40,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:33:40,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:41,367 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:33:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:41,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:41,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:33:41,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633770834] [2021-05-03 14:33:41,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:33:41,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:41,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:33:41,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:33:41,596 INFO L87 Difference]: Start difference. First operand 171 states and 380 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:41,841 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-05-03 14:33:42,076 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-05-03 14:33:42,309 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-05-03 14:33:42,465 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-05-03 14:33:43,140 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-05-03 14:33:43,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:43,293 INFO L93 Difference]: Finished difference Result 243 states and 499 transitions. [2021-05-03 14:33:43,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:33:43,293 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:33:43,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:43,294 INFO L225 Difference]: With dead ends: 243 [2021-05-03 14:33:43,294 INFO L226 Difference]: Without dead ends: 224 [2021-05-03 14:33:43,294 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1933.9ms TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:33:43,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-03 14:33:43,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 170. [2021-05-03 14:33:43,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.2366863905325443) internal successors, (378), 169 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 378 transitions. [2021-05-03 14:33:43,296 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 378 transitions. Word has length 18 [2021-05-03 14:33:43,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:43,296 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 378 transitions. [2021-05-03 14:33:43,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:43,296 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 378 transitions. [2021-05-03 14:33:43,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:43,297 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:43,297 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:43,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1598 [2021-05-03 14:33:43,497 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:43,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:43,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1811849252, now seen corresponding path program 206 times [2021-05-03 14:33:43,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:43,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636475372] [2021-05-03 14:33:43,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:43,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636475372] [2021-05-03 14:33:43,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453652227] [2021-05-03 14:33:43,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:43,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:33:43,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:43,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:33:43,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:44,515 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:33:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:44,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:44,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:33:44,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557151114] [2021-05-03 14:33:44,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:33:44,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:44,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:33:44,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:33:44,839 INFO L87 Difference]: Start difference. First operand 170 states and 378 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:45,200 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-05-03 14:33:45,658 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-05-03 14:33:46,019 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 14:33:46,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:46,435 INFO L93 Difference]: Finished difference Result 233 states and 490 transitions. [2021-05-03 14:33:46,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:33:46,437 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:33:46,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:46,437 INFO L225 Difference]: With dead ends: 233 [2021-05-03 14:33:46,437 INFO L226 Difference]: Without dead ends: 214 [2021-05-03 14:33:46,438 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 2049.6ms TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:33:46,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-03 14:33:46,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 169. [2021-05-03 14:33:46,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.238095238095238) internal successors, (376), 168 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 376 transitions. [2021-05-03 14:33:46,440 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 376 transitions. Word has length 18 [2021-05-03 14:33:46,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:46,440 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 376 transitions. [2021-05-03 14:33:46,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:46,440 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 376 transitions. [2021-05-03 14:33:46,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:46,440 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:46,440 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:46,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1611 [2021-05-03 14:33:46,641 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:46,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:46,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1976771778, now seen corresponding path program 207 times [2021-05-03 14:33:46,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:46,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300968273] [2021-05-03 14:33:46,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:46,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300968273] [2021-05-03 14:33:46,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015918230] [2021-05-03 14:33:46,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:47,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:33:47,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:47,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:33:47,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:47,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:47,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:33:47,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926206116] [2021-05-03 14:33:47,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:33:47,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:47,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:33:47,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:33:47,722 INFO L87 Difference]: Start difference. First operand 169 states and 376 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:48,076 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-05-03 14:33:48,291 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-05-03 14:33:48,522 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-05-03 14:33:48,711 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-05-03 14:33:48,871 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 14:33:49,068 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-05-03 14:33:49,369 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-05-03 14:33:49,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:49,735 INFO L93 Difference]: Finished difference Result 246 states and 519 transitions. [2021-05-03 14:33:49,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:33:49,736 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:33:49,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:49,737 INFO L225 Difference]: With dead ends: 246 [2021-05-03 14:33:49,737 INFO L226 Difference]: Without dead ends: 227 [2021-05-03 14:33:49,737 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 2224.6ms TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:33:49,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-03 14:33:49,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 170. [2021-05-03 14:33:49,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.242603550295858) internal successors, (379), 169 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:49,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 379 transitions. [2021-05-03 14:33:49,739 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 379 transitions. Word has length 18 [2021-05-03 14:33:49,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:49,739 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 379 transitions. [2021-05-03 14:33:49,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:49,739 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 379 transitions. [2021-05-03 14:33:49,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:49,739 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:49,739 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:49,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1623,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:49,942 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:49,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:49,942 INFO L82 PathProgramCache]: Analyzing trace with hash -89256540, now seen corresponding path program 208 times [2021-05-03 14:33:49,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:49,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924074476] [2021-05-03 14:33:49,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:50,344 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 34 [2021-05-03 14:33:50,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:50,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924074476] [2021-05-03 14:33:50,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794753679] [2021-05-03 14:33:50,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:50,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:33:50,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:50,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:33:50,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:50,959 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 14:33:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:51,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:51,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:33:51,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583707923] [2021-05-03 14:33:51,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:33:51,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:51,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:33:51,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:33:51,235 INFO L87 Difference]: Start difference. First operand 170 states and 379 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:51,757 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-05-03 14:33:52,223 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-05-03 14:33:52,406 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-03 14:33:52,659 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 28 [2021-05-03 14:33:52,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:52,694 INFO L93 Difference]: Finished difference Result 188 states and 408 transitions. [2021-05-03 14:33:52,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:33:52,696 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:33:52,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:52,696 INFO L225 Difference]: With dead ends: 188 [2021-05-03 14:33:52,696 INFO L226 Difference]: Without dead ends: 181 [2021-05-03 14:33:52,696 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 2054.2ms TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:33:52,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-03 14:33:52,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 173. [2021-05-03 14:33:52,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.244186046511628) internal successors, (386), 172 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:52,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 386 transitions. [2021-05-03 14:33:52,698 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 386 transitions. Word has length 18 [2021-05-03 14:33:52,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:52,698 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 386 transitions. [2021-05-03 14:33:52,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:52,698 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 386 transitions. [2021-05-03 14:33:52,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:52,698 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:52,699 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:52,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1633 [2021-05-03 14:33:52,899 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:52,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:52,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1666598270, now seen corresponding path program 209 times [2021-05-03 14:33:52,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:52,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105694673] [2021-05-03 14:33:52,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:52,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:53,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105694673] [2021-05-03 14:33:53,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291747842] [2021-05-03 14:33:53,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:53,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:33:53,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:53,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:33:53,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:53,939 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:33:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:54,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:54,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:33:54,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066431340] [2021-05-03 14:33:54,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:33:54,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:54,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:33:54,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:33:54,471 INFO L87 Difference]: Start difference. First operand 173 states and 386 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:54,752 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-05-03 14:33:54,933 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 14:33:55,225 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-05-03 14:33:55,524 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-05-03 14:33:55,689 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2021-05-03 14:33:56,114 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 45 [2021-05-03 14:33:56,378 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-05-03 14:33:56,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:56,427 INFO L93 Difference]: Finished difference Result 211 states and 448 transitions. [2021-05-03 14:33:56,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:33:56,429 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:33:56,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:56,429 INFO L225 Difference]: With dead ends: 211 [2021-05-03 14:33:56,429 INFO L226 Difference]: Without dead ends: 194 [2021-05-03 14:33:56,429 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2665.7ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:33:56,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-03 14:33:56,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 174. [2021-05-03 14:33:56,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2369942196531793) internal successors, (387), 173 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:56,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 387 transitions. [2021-05-03 14:33:56,431 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 387 transitions. Word has length 18 [2021-05-03 14:33:56,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:56,431 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 387 transitions. [2021-05-03 14:33:56,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:56,431 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 387 transitions. [2021-05-03 14:33:56,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:56,431 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:56,431 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:56,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1646 [2021-05-03 14:33:56,632 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:56,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:56,632 INFO L82 PathProgramCache]: Analyzing trace with hash -332006940, now seen corresponding path program 210 times [2021-05-03 14:33:56,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:56,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988749707] [2021-05-03 14:33:56,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:56,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988749707] [2021-05-03 14:33:56,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111466040] [2021-05-03 14:33:56,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:57,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:33:57,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:57,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-03 14:33:57,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:57,474 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:33:57,851 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:57,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:57,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:33:57,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438493024] [2021-05-03 14:33:57,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:33:57,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:57,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:33:57,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:33:57,852 INFO L87 Difference]: Start difference. First operand 174 states and 387 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:58,301 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-05-03 14:33:58,549 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-05-03 14:33:59,248 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-05-03 14:33:59,414 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2021-05-03 14:33:59,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:59,440 INFO L93 Difference]: Finished difference Result 259 states and 523 transitions. [2021-05-03 14:33:59,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:33:59,441 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:33:59,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:59,441 INFO L225 Difference]: With dead ends: 259 [2021-05-03 14:33:59,441 INFO L226 Difference]: Without dead ends: 240 [2021-05-03 14:33:59,441 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1983.9ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:33:59,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-03 14:33:59,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 172. [2021-05-03 14:33:59,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.239766081871345) internal successors, (383), 171 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:59,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 383 transitions. [2021-05-03 14:33:59,443 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 383 transitions. Word has length 18 [2021-05-03 14:33:59,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:59,443 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 383 transitions. [2021-05-03 14:33:59,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:59,443 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 383 transitions. [2021-05-03 14:33:59,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:59,443 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:59,443 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:59,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1658,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:59,644 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:59,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:59,644 INFO L82 PathProgramCache]: Analyzing trace with hash -953056767, now seen corresponding path program 211 times [2021-05-03 14:33:59,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:59,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617915809] [2021-05-03 14:33:59,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:59,886 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:33:59,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617915809] [2021-05-03 14:33:59,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640319995] [2021-05-03 14:33:59,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:59,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:33:59,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:34:00,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:00,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:34:00,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502334468] [2021-05-03 14:34:00,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:34:00,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:00,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:34:00,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:34:00,182 INFO L87 Difference]: Start difference. First operand 172 states and 383 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:00,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:00,527 INFO L93 Difference]: Finished difference Result 200 states and 439 transitions. [2021-05-03 14:34:00,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:34:00,528 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:00,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:00,529 INFO L225 Difference]: With dead ends: 200 [2021-05-03 14:34:00,529 INFO L226 Difference]: Without dead ends: 200 [2021-05-03 14:34:00,529 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 468.0ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:34:00,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-03 14:34:00,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 172. [2021-05-03 14:34:00,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.239766081871345) internal successors, (383), 171 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:00,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 383 transitions. [2021-05-03 14:34:00,531 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 383 transitions. Word has length 18 [2021-05-03 14:34:00,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:00,531 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 383 transitions. [2021-05-03 14:34:00,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:00,531 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 383 transitions. [2021-05-03 14:34:00,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:00,531 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:00,531 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:00,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1671 [2021-05-03 14:34:00,732 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:00,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:00,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1160252004, now seen corresponding path program 212 times [2021-05-03 14:34:00,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:00,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107063525] [2021-05-03 14:34:00,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:01,113 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 29 [2021-05-03 14:34:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:01,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107063525] [2021-05-03 14:34:01,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454851983] [2021-05-03 14:34:01,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:01,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:34:01,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:01,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:34:01,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:01,765 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 14:34:01,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:01,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:01,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:34:01,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939572265] [2021-05-03 14:34:01,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:34:01,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:01,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:34:01,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:34:01,925 INFO L87 Difference]: Start difference. First operand 172 states and 383 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:02,407 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-05-03 14:34:02,623 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-05-03 14:34:02,821 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-05-03 14:34:03,103 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-05-03 14:34:03,406 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2021-05-03 14:34:03,757 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-05-03 14:34:03,966 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-05-03 14:34:04,142 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-05-03 14:34:04,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:04,170 INFO L93 Difference]: Finished difference Result 224 states and 465 transitions. [2021-05-03 14:34:04,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:34:04,171 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:04,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:04,172 INFO L225 Difference]: With dead ends: 224 [2021-05-03 14:34:04,172 INFO L226 Difference]: Without dead ends: 217 [2021-05-03 14:34:04,172 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 2581.0ms TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:34:04,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-03 14:34:04,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 174. [2021-05-03 14:34:04,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2427745664739884) internal successors, (388), 173 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:04,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 388 transitions. [2021-05-03 14:34:04,175 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 388 transitions. Word has length 18 [2021-05-03 14:34:04,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:04,175 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 388 transitions. [2021-05-03 14:34:04,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:04,175 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 388 transitions. [2021-05-03 14:34:04,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:04,176 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:04,176 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:04,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1676,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:04,389 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:04,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:04,389 INFO L82 PathProgramCache]: Analyzing trace with hash 174339326, now seen corresponding path program 213 times [2021-05-03 14:34:04,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:04,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859751325] [2021-05-03 14:34:04,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:04,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859751325] [2021-05-03 14:34:04,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705768557] [2021-05-03 14:34:04,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:04,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:34:04,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:04,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:34:04,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:05,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:05,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:34:05,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438780749] [2021-05-03 14:34:05,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:34:05,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:05,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:34:05,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:34:05,324 INFO L87 Difference]: Start difference. First operand 174 states and 388 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:05,585 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-05-03 14:34:05,822 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-05-03 14:34:06,085 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 14:34:06,266 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-05-03 14:34:06,544 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-05-03 14:34:06,849 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 31 [2021-05-03 14:34:07,002 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-03 14:34:07,490 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-05-03 14:34:07,714 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-05-03 14:34:07,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:07,775 INFO L93 Difference]: Finished difference Result 262 states and 526 transitions. [2021-05-03 14:34:07,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:34:07,776 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:07,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:07,777 INFO L225 Difference]: With dead ends: 262 [2021-05-03 14:34:07,777 INFO L226 Difference]: Without dead ends: 239 [2021-05-03 14:34:07,777 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 2363.1ms TimeCoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:34:07,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-05-03 14:34:07,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 173. [2021-05-03 14:34:07,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.238372093023256) internal successors, (385), 172 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:07,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 385 transitions. [2021-05-03 14:34:07,779 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 385 transitions. Word has length 18 [2021-05-03 14:34:07,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:07,779 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 385 transitions. [2021-05-03 14:34:07,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:07,779 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 385 transitions. [2021-05-03 14:34:07,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:07,779 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:07,779 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:07,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1688 [2021-05-03 14:34:07,980 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:07,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:07,980 INFO L82 PathProgramCache]: Analyzing trace with hash -363516252, now seen corresponding path program 214 times [2021-05-03 14:34:07,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:07,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720760123] [2021-05-03 14:34:07,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:08,301 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-03 14:34:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:08,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720760123] [2021-05-03 14:34:08,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193884991] [2021-05-03 14:34:08,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:08,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:34:08,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:08,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:34:08,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:09,055 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:34:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:09,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:09,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:34:09,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169348310] [2021-05-03 14:34:09,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:34:09,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:09,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:34:09,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:34:09,379 INFO L87 Difference]: Start difference. First operand 173 states and 385 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:09,898 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-05-03 14:34:10,038 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 24 [2021-05-03 14:34:10,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:10,495 INFO L93 Difference]: Finished difference Result 241 states and 495 transitions. [2021-05-03 14:34:10,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:34:10,496 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:10,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:10,496 INFO L225 Difference]: With dead ends: 241 [2021-05-03 14:34:10,496 INFO L226 Difference]: Without dead ends: 219 [2021-05-03 14:34:10,497 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1664.1ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:34:10,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-03 14:34:10,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 173. [2021-05-03 14:34:10,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.238372093023256) internal successors, (385), 172 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:10,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 385 transitions. [2021-05-03 14:34:10,498 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 385 transitions. Word has length 18 [2021-05-03 14:34:10,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:10,499 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 385 transitions. [2021-05-03 14:34:10,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:10,499 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 385 transitions. [2021-05-03 14:34:10,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:10,499 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:10,499 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:10,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1700,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:10,699 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:10,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:10,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1651580354, now seen corresponding path program 215 times [2021-05-03 14:34:10,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:10,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656295913] [2021-05-03 14:34:10,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:11,127 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 28 [2021-05-03 14:34:11,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:11,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656295913] [2021-05-03 14:34:11,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677167655] [2021-05-03 14:34:11,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:11,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:34:11,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:11,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:34:11,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:11,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:11,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:11,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:34:11,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131493162] [2021-05-03 14:34:11,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:34:11,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:11,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:34:11,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:34:11,830 INFO L87 Difference]: Start difference. First operand 173 states and 385 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:12,111 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-05-03 14:34:12,569 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2021-05-03 14:34:12,922 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2021-05-03 14:34:13,127 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 34 [2021-05-03 14:34:13,407 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 28 [2021-05-03 14:34:13,551 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-05-03 14:34:13,778 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-05-03 14:34:13,981 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2021-05-03 14:34:14,329 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 39 [2021-05-03 14:34:14,576 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 40 [2021-05-03 14:34:14,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:14,662 INFO L93 Difference]: Finished difference Result 239 states and 492 transitions. [2021-05-03 14:34:14,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:34:14,663 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:14,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:14,663 INFO L225 Difference]: With dead ends: 239 [2021-05-03 14:34:14,663 INFO L226 Difference]: Without dead ends: 207 [2021-05-03 14:34:14,664 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 3027.2ms TimeCoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:34:14,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-03 14:34:14,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 176. [2021-05-03 14:34:14,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.24) internal successors, (392), 175 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:14,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 392 transitions. [2021-05-03 14:34:14,665 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 392 transitions. Word has length 18 [2021-05-03 14:34:14,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:14,666 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 392 transitions. [2021-05-03 14:34:14,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:14,666 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 392 transitions. [2021-05-03 14:34:14,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:14,666 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:14,666 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:14,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1712 [2021-05-03 14:34:14,867 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:14,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:14,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1846651190, now seen corresponding path program 216 times [2021-05-03 14:34:14,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:14,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463306339] [2021-05-03 14:34:14,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:15,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463306339] [2021-05-03 14:34:15,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332149200] [2021-05-03 14:34:15,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:15,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:34:15,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:15,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:34:15,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:15,928 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:34:16,106 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-05-03 14:34:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:16,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:16,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:34:16,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201989507] [2021-05-03 14:34:16,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:34:16,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:16,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:34:16,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:34:16,312 INFO L87 Difference]: Start difference. First operand 176 states and 392 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:16,645 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-05-03 14:34:16,851 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-05-03 14:34:17,258 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-05-03 14:34:17,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:17,780 INFO L93 Difference]: Finished difference Result 248 states and 508 transitions. [2021-05-03 14:34:17,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:34:17,781 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:17,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:17,782 INFO L225 Difference]: With dead ends: 248 [2021-05-03 14:34:17,782 INFO L226 Difference]: Without dead ends: 226 [2021-05-03 14:34:17,782 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 2168.6ms TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:34:17,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-03 14:34:17,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 176. [2021-05-03 14:34:17,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.24) internal successors, (392), 175 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:17,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 392 transitions. [2021-05-03 14:34:17,784 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 392 transitions. Word has length 18 [2021-05-03 14:34:17,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:17,784 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 392 transitions. [2021-05-03 14:34:17,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:17,784 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 392 transitions. [2021-05-03 14:34:17,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:17,785 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:17,785 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:17,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1725 [2021-05-03 14:34:17,985 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:17,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:17,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1340304924, now seen corresponding path program 217 times [2021-05-03 14:34:17,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:17,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900424845] [2021-05-03 14:34:17,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:18,275 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-05-03 14:34:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:18,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900424845] [2021-05-03 14:34:18,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578520998] [2021-05-03 14:34:18,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:18,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:34:18,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:19,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:19,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:34:19,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078294163] [2021-05-03 14:34:19,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:34:19,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:19,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:34:19,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:34:19,304 INFO L87 Difference]: Start difference. First operand 176 states and 392 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:19,634 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-05-03 14:34:20,044 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 14:34:20,327 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-05-03 14:34:20,773 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2021-05-03 14:34:20,968 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 27 [2021-05-03 14:34:21,202 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2021-05-03 14:34:21,470 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 38 [2021-05-03 14:34:21,729 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-05-03 14:34:22,083 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-05-03 14:34:22,387 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-05-03 14:34:22,702 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2021-05-03 14:34:23,045 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-05-03 14:34:23,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:23,286 INFO L93 Difference]: Finished difference Result 242 states and 511 transitions. [2021-05-03 14:34:23,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:34:23,287 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:23,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:23,288 INFO L225 Difference]: With dead ends: 242 [2021-05-03 14:34:23,288 INFO L226 Difference]: Without dead ends: 207 [2021-05-03 14:34:23,288 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 4226.1ms TimeCoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 14:34:23,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-03 14:34:23,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 179. [2021-05-03 14:34:23,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.235955056179775) internal successors, (398), 178 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:23,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 398 transitions. [2021-05-03 14:34:23,290 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 398 transitions. Word has length 18 [2021-05-03 14:34:23,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:23,290 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 398 transitions. [2021-05-03 14:34:23,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:23,290 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 398 transitions. [2021-05-03 14:34:23,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:23,290 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:23,290 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:23,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1737,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:23,491 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:23,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:23,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1375929764, now seen corresponding path program 218 times [2021-05-03 14:34:23,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:23,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057449664] [2021-05-03 14:34:23,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:23,864 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-05-03 14:34:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:24,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057449664] [2021-05-03 14:34:24,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605858645] [2021-05-03 14:34:24,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:24,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:34:24,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:24,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 14:34:24,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:24,886 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-03 14:34:25,222 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-05-03 14:34:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:25,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:25,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:34:25,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234263441] [2021-05-03 14:34:25,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:34:25,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:25,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:34:25,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:34:25,458 INFO L87 Difference]: Start difference. First operand 179 states and 398 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:25,735 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-05-03 14:34:25,939 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-05-03 14:34:26,176 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-05-03 14:34:26,399 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-03 14:34:26,560 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 14:34:27,002 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-05-03 14:34:27,412 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-05-03 14:34:27,847 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-05-03 14:34:28,138 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2021-05-03 14:34:28,442 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2021-05-03 14:34:28,784 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-05-03 14:34:28,951 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-05-03 14:34:29,153 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-03 14:34:29,377 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-05-03 14:34:29,710 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 14:34:29,993 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-05-03 14:34:30,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:30,140 INFO L93 Difference]: Finished difference Result 246 states and 508 transitions. [2021-05-03 14:34:30,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:34:30,142 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:30,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:30,142 INFO L225 Difference]: With dead ends: 246 [2021-05-03 14:34:30,142 INFO L226 Difference]: Without dead ends: 218 [2021-05-03 14:34:30,142 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 5453.2ms TimeCoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 14:34:30,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-03 14:34:30,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 180. [2021-05-03 14:34:30,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.2458100558659218) internal successors, (402), 179 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:30,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 402 transitions. [2021-05-03 14:34:30,144 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 402 transitions. Word has length 18 [2021-05-03 14:34:30,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:30,144 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 402 transitions. [2021-05-03 14:34:30,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:30,144 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 402 transitions. [2021-05-03 14:34:30,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:30,145 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:30,145 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:30,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1747 [2021-05-03 14:34:30,345 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:30,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:30,346 INFO L82 PathProgramCache]: Analyzing trace with hash -579194012, now seen corresponding path program 219 times [2021-05-03 14:34:30,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:30,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874966449] [2021-05-03 14:34:30,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:30,689 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-05-03 14:34:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:30,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874966449] [2021-05-03 14:34:30,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311721823] [2021-05-03 14:34:30,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:30,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:34:30,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:30,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-03 14:34:30,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:31,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:31,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:31,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:34:31,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549854615] [2021-05-03 14:34:31,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:34:31,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:31,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:34:31,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:34:31,448 INFO L87 Difference]: Start difference. First operand 180 states and 402 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:31,810 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-05-03 14:34:32,454 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 31 [2021-05-03 14:34:32,659 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-05-03 14:34:32,799 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-05-03 14:34:33,142 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 36 [2021-05-03 14:34:33,465 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2021-05-03 14:34:33,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:33,609 INFO L93 Difference]: Finished difference Result 251 states and 517 transitions. [2021-05-03 14:34:33,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:34:33,610 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:33,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:33,611 INFO L225 Difference]: With dead ends: 251 [2021-05-03 14:34:33,611 INFO L226 Difference]: Without dead ends: 208 [2021-05-03 14:34:33,611 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2450.7ms TimeCoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:34:33,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-03 14:34:33,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 182. [2021-05-03 14:34:33,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.2430939226519335) internal successors, (406), 181 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:33,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 406 transitions. [2021-05-03 14:34:33,613 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 406 transitions. Word has length 18 [2021-05-03 14:34:33,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:33,613 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 406 transitions. [2021-05-03 14:34:33,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:33,613 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 406 transitions. [2021-05-03 14:34:33,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:33,613 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:33,613 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:33,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1758,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:33,814 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:33,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:33,814 INFO L82 PathProgramCache]: Analyzing trace with hash -72847746, now seen corresponding path program 220 times [2021-05-03 14:34:33,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:33,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37172953] [2021-05-03 14:34:33,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:34,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37172953] [2021-05-03 14:34:34,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147045497] [2021-05-03 14:34:34,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:34,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:34:34,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:34,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:34:34,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:35,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:35,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:35,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:34:35,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51729378] [2021-05-03 14:34:35,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:34:35,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:35,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:34:35,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:34:35,038 INFO L87 Difference]: Start difference. First operand 182 states and 406 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:35,505 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-05-03 14:34:35,754 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-05-03 14:34:36,049 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-05-03 14:34:36,363 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2021-05-03 14:34:36,610 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-05-03 14:34:36,823 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 29 [2021-05-03 14:34:37,062 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 28 [2021-05-03 14:34:37,277 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 29 [2021-05-03 14:34:37,663 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-05-03 14:34:37,822 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 21 [2021-05-03 14:34:38,092 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-05-03 14:34:38,378 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2021-05-03 14:34:38,893 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2021-05-03 14:34:39,222 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2021-05-03 14:34:39,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:39,385 INFO L93 Difference]: Finished difference Result 277 states and 562 transitions. [2021-05-03 14:34:39,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:34:39,386 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:39,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:39,386 INFO L225 Difference]: With dead ends: 277 [2021-05-03 14:34:39,386 INFO L226 Difference]: Without dead ends: 217 [2021-05-03 14:34:39,387 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 4423.9ms TimeCoverageRelationStatistics Valid=267, Invalid=1455, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 14:34:39,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-03 14:34:39,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 182. [2021-05-03 14:34:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.2430939226519335) internal successors, (406), 181 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:39,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 406 transitions. [2021-05-03 14:34:39,389 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 406 transitions. Word has length 18 [2021-05-03 14:34:39,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:39,389 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 406 transitions. [2021-05-03 14:34:39,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:39,389 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 406 transitions. [2021-05-03 14:34:39,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:39,390 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:39,390 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:39,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1769,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:39,605 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:39,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:39,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1555982684, now seen corresponding path program 221 times [2021-05-03 14:34:39,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:39,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334647847] [2021-05-03 14:34:39,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:40,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334647847] [2021-05-03 14:34:40,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112399123] [2021-05-03 14:34:40,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:40,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:34:40,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:40,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:34:40,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:40,599 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-05-03 14:34:41,119 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-05-03 14:34:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:41,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:41,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:34:41,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950646885] [2021-05-03 14:34:41,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:34:41,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:41,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:34:41,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:34:41,318 INFO L87 Difference]: Start difference. First operand 182 states and 406 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:41,686 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-05-03 14:34:41,877 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-05-03 14:34:42,250 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-05-03 14:34:42,547 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2021-05-03 14:34:42,853 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-05-03 14:34:43,399 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 35 [2021-05-03 14:34:43,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:43,933 INFO L93 Difference]: Finished difference Result 266 states and 541 transitions. [2021-05-03 14:34:43,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:34:43,934 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:43,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:43,935 INFO L225 Difference]: With dead ends: 266 [2021-05-03 14:34:43,935 INFO L226 Difference]: Without dead ends: 228 [2021-05-03 14:34:43,935 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 3418.8ms TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:34:43,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-03 14:34:43,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 182. [2021-05-03 14:34:43,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.2430939226519335) internal successors, (406), 181 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:43,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 406 transitions. [2021-05-03 14:34:43,937 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 406 transitions. Word has length 18 [2021-05-03 14:34:43,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:43,937 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 406 transitions. [2021-05-03 14:34:43,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:43,937 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 406 transitions. [2021-05-03 14:34:43,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:43,937 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:43,938 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:44,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1779 [2021-05-03 14:34:44,138 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:44,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:44,138 INFO L82 PathProgramCache]: Analyzing trace with hash 179489888, now seen corresponding path program 222 times [2021-05-03 14:34:44,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:44,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044324889] [2021-05-03 14:34:44,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:44,643 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 28 [2021-05-03 14:34:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:44,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044324889] [2021-05-03 14:34:44,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252633054] [2021-05-03 14:34:44,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:44,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:34:44,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:44,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:34:44,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:45,302 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:34:45,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:45,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:45,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:34:45,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031697536] [2021-05-03 14:34:45,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:34:45,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:45,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:34:45,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:34:45,738 INFO L87 Difference]: Start difference. First operand 182 states and 406 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:46,281 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2021-05-03 14:34:46,483 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-05-03 14:34:46,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:46,645 INFO L93 Difference]: Finished difference Result 200 states and 432 transitions. [2021-05-03 14:34:46,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:34:46,646 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:46,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:46,647 INFO L225 Difference]: With dead ends: 200 [2021-05-03 14:34:46,647 INFO L226 Difference]: Without dead ends: 187 [2021-05-03 14:34:46,647 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1802.8ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:34:46,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-05-03 14:34:46,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2021-05-03 14:34:46,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.241758241758242) internal successors, (408), 182 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:46,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 408 transitions. [2021-05-03 14:34:46,649 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 408 transitions. Word has length 18 [2021-05-03 14:34:46,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:46,649 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 408 transitions. [2021-05-03 14:34:46,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:46,650 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 408 transitions. [2021-05-03 14:34:46,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:46,650 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:46,650 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:46,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1791,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:46,850 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:46,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:46,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1397851842, now seen corresponding path program 223 times [2021-05-03 14:34:46,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:46,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076843878] [2021-05-03 14:34:46,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:46,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:47,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076843878] [2021-05-03 14:34:47,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550006216] [2021-05-03 14:34:47,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:47,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:34:47,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:47,790 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:34:47,955 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 14:34:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:48,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:48,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:34:48,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146554016] [2021-05-03 14:34:48,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:34:48,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:48,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:34:48,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:34:48,299 INFO L87 Difference]: Start difference. First operand 183 states and 408 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:48,667 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-05-03 14:34:48,936 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-05-03 14:34:49,268 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2021-05-03 14:34:49,532 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-05-03 14:34:49,702 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 28 [2021-05-03 14:34:50,013 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-05-03 14:34:50,260 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-05-03 14:34:50,590 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-05-03 14:34:50,748 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 26 [2021-05-03 14:34:51,031 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-05-03 14:34:51,312 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-05-03 14:34:51,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:51,359 INFO L93 Difference]: Finished difference Result 261 states and 530 transitions. [2021-05-03 14:34:51,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:34:51,361 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:51,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:51,361 INFO L225 Difference]: With dead ends: 261 [2021-05-03 14:34:51,361 INFO L226 Difference]: Without dead ends: 232 [2021-05-03 14:34:51,362 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 3532.4ms TimeCoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:34:51,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-03 14:34:51,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 188. [2021-05-03 14:34:51,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2459893048128343) internal successors, (420), 187 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:51,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 420 transitions. [2021-05-03 14:34:51,364 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 420 transitions. Word has length 18 [2021-05-03 14:34:51,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:51,364 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 420 transitions. [2021-05-03 14:34:51,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:51,364 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 420 transitions. [2021-05-03 14:34:51,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:51,364 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:51,364 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:51,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1803 [2021-05-03 14:34:51,565 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:51,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:51,565 INFO L82 PathProgramCache]: Analyzing trace with hash -684310339, now seen corresponding path program 224 times [2021-05-03 14:34:51,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:51,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759660965] [2021-05-03 14:34:51,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:51,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:51,752 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:34:51,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759660965] [2021-05-03 14:34:51,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662138274] [2021-05-03 14:34:51,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:51,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:34:51,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:51,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:34:51,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:34:51,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:51,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:34:51,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605483610] [2021-05-03 14:34:51,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:34:51,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:51,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:34:51,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:34:51,975 INFO L87 Difference]: Start difference. First operand 188 states and 420 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:52,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:52,781 INFO L93 Difference]: Finished difference Result 215 states and 473 transitions. [2021-05-03 14:34:52,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:34:52,783 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:52,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:52,784 INFO L225 Difference]: With dead ends: 215 [2021-05-03 14:34:52,784 INFO L226 Difference]: Without dead ends: 215 [2021-05-03 14:34:52,784 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 655.6ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:34:52,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-05-03 14:34:52,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 187. [2021-05-03 14:34:52,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.247311827956989) internal successors, (418), 186 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:52,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 418 transitions. [2021-05-03 14:34:52,786 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 418 transitions. Word has length 18 [2021-05-03 14:34:52,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:52,786 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 418 transitions. [2021-05-03 14:34:52,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:52,786 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 418 transitions. [2021-05-03 14:34:52,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:52,786 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:52,786 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:52,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1815,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:52,987 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:52,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:52,987 INFO L82 PathProgramCache]: Analyzing trace with hash -891505576, now seen corresponding path program 225 times [2021-05-03 14:34:52,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:52,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998605281] [2021-05-03 14:34:52,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:53,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998605281] [2021-05-03 14:34:53,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262260332] [2021-05-03 14:34:53,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:53,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:34:53,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:53,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:34:53,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:54,093 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:34:54,265 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-05-03 14:34:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:54,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:54,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:34:54,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659906452] [2021-05-03 14:34:54,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:34:54,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:54,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:34:54,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:34:54,460 INFO L87 Difference]: Start difference. First operand 187 states and 418 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:54,877 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-05-03 14:34:55,370 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 31 [2021-05-03 14:34:55,622 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 28 [2021-05-03 14:34:55,866 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-05-03 14:34:56,063 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-05-03 14:34:56,461 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-05-03 14:34:56,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:56,560 INFO L93 Difference]: Finished difference Result 243 states and 514 transitions. [2021-05-03 14:34:56,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:34:56,562 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:56,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:56,562 INFO L225 Difference]: With dead ends: 243 [2021-05-03 14:34:56,562 INFO L226 Difference]: Without dead ends: 218 [2021-05-03 14:34:56,563 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2625.9ms TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:34:56,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-03 14:34:56,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 188. [2021-05-03 14:34:56,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2459893048128343) internal successors, (420), 187 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:56,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 420 transitions. [2021-05-03 14:34:56,565 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 420 transitions. Word has length 18 [2021-05-03 14:34:56,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:56,565 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 420 transitions. [2021-05-03 14:34:56,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:56,565 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 420 transitions. [2021-05-03 14:34:56,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:56,565 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:56,565 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:56,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1820 [2021-05-03 14:34:56,766 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:56,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:56,766 INFO L82 PathProgramCache]: Analyzing trace with hash -94769824, now seen corresponding path program 226 times [2021-05-03 14:34:56,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:56,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602337806] [2021-05-03 14:34:56,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:56,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:57,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602337806] [2021-05-03 14:34:57,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622718022] [2021-05-03 14:34:57,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:57,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:34:57,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:57,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:34:57,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:57,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:57,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:34:57,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779029685] [2021-05-03 14:34:57,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:34:57,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:57,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:34:57,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:34:57,927 INFO L87 Difference]: Start difference. First operand 188 states and 420 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:58,619 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-05-03 14:34:58,837 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 14:34:59,101 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2021-05-03 14:34:59,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:59,814 INFO L93 Difference]: Finished difference Result 253 states and 535 transitions. [2021-05-03 14:34:59,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:34:59,817 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:59,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:59,817 INFO L225 Difference]: With dead ends: 253 [2021-05-03 14:34:59,817 INFO L226 Difference]: Without dead ends: 234 [2021-05-03 14:34:59,817 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1930.7ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:34:59,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-03 14:34:59,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 188. [2021-05-03 14:34:59,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2459893048128343) internal successors, (420), 187 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:59,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 420 transitions. [2021-05-03 14:34:59,819 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 420 transitions. Word has length 18 [2021-05-03 14:34:59,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:59,819 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 420 transitions. [2021-05-03 14:34:59,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:59,819 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 420 transitions. [2021-05-03 14:34:59,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:59,820 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:59,820 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:00,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1832,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:00,020 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:00,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:00,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1920326782, now seen corresponding path program 227 times [2021-05-03 14:35:00,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:00,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783926309] [2021-05-03 14:35:00,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:00,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783926309] [2021-05-03 14:35:00,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556251315] [2021-05-03 14:35:00,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:00,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:35:00,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:00,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:35:00,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:01,137 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 14:35:01,501 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-05-03 14:35:01,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:01,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:01,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:01,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936434381] [2021-05-03 14:35:01,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:01,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:01,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:01,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:01,824 INFO L87 Difference]: Start difference. First operand 188 states and 420 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:02,321 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-05-03 14:35:02,788 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-05-03 14:35:03,316 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-05-03 14:35:03,861 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2021-05-03 14:35:04,186 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 39 [2021-05-03 14:35:04,522 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 25 [2021-05-03 14:35:04,865 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-05-03 14:35:05,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:05,173 INFO L93 Difference]: Finished difference Result 244 states and 510 transitions. [2021-05-03 14:35:05,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:35:05,174 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:05,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:05,175 INFO L225 Difference]: With dead ends: 244 [2021-05-03 14:35:05,175 INFO L226 Difference]: Without dead ends: 219 [2021-05-03 14:35:05,175 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 4048.5ms TimeCoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:35:05,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-03 14:35:05,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 188. [2021-05-03 14:35:05,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2459893048128343) internal successors, (420), 187 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:05,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 420 transitions. [2021-05-03 14:35:05,177 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 420 transitions. Word has length 18 [2021-05-03 14:35:05,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:05,177 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 420 transitions. [2021-05-03 14:35:05,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:05,177 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 420 transitions. [2021-05-03 14:35:05,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:05,177 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:05,177 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:05,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1842,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:05,378 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:05,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:05,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1577904762, now seen corresponding path program 228 times [2021-05-03 14:35:05,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:05,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353079192] [2021-05-03 14:35:05,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:05,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353079192] [2021-05-03 14:35:05,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593778531] [2021-05-03 14:35:05,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:05,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:35:05,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:05,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:35:05,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:06,805 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:35:07,012 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-05-03 14:35:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:07,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:07,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:07,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172556420] [2021-05-03 14:35:07,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:07,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:07,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:07,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:07,252 INFO L87 Difference]: Start difference. First operand 188 states and 420 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:07,750 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-05-03 14:35:07,942 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-05-03 14:35:08,307 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 31 [2021-05-03 14:35:08,564 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 24 [2021-05-03 14:35:08,937 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-05-03 14:35:09,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:09,125 INFO L93 Difference]: Finished difference Result 247 states and 519 transitions. [2021-05-03 14:35:09,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:35:09,126 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:09,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:09,127 INFO L225 Difference]: With dead ends: 247 [2021-05-03 14:35:09,127 INFO L226 Difference]: Without dead ends: 225 [2021-05-03 14:35:09,127 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2632.7ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:35:09,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-05-03 14:35:09,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 187. [2021-05-03 14:35:09,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.247311827956989) internal successors, (418), 186 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:09,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 418 transitions. [2021-05-03 14:35:09,129 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 418 transitions. Word has length 18 [2021-05-03 14:35:09,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:09,129 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 418 transitions. [2021-05-03 14:35:09,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:09,129 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 418 transitions. [2021-05-03 14:35:09,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:09,129 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:09,129 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:09,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1854 [2021-05-03 14:35:09,330 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:09,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:09,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1071558496, now seen corresponding path program 229 times [2021-05-03 14:35:09,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:09,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529963602] [2021-05-03 14:35:09,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:09,630 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-05-03 14:35:09,790 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-03 14:35:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:09,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529963602] [2021-05-03 14:35:09,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511451389] [2021-05-03 14:35:09,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:09,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:35:09,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:10,655 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:35:10,994 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-05-03 14:35:11,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:11,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:11,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:11,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970352417] [2021-05-03 14:35:11,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:11,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:11,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:11,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:11,191 INFO L87 Difference]: Start difference. First operand 187 states and 418 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:11,619 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-05-03 14:35:12,048 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-05-03 14:35:12,330 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-05-03 14:35:12,556 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 24 [2021-05-03 14:35:12,778 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 14:35:13,251 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-05-03 14:35:13,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:13,317 INFO L93 Difference]: Finished difference Result 257 states and 543 transitions. [2021-05-03 14:35:13,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:35:13,319 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:13,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:13,320 INFO L225 Difference]: With dead ends: 257 [2021-05-03 14:35:13,320 INFO L226 Difference]: Without dead ends: 238 [2021-05-03 14:35:13,320 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 2899.8ms TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:35:13,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-03 14:35:13,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 187. [2021-05-03 14:35:13,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.247311827956989) internal successors, (418), 186 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:13,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 418 transitions. [2021-05-03 14:35:13,322 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 418 transitions. Word has length 18 [2021-05-03 14:35:13,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:13,322 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 418 transitions. [2021-05-03 14:35:13,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:13,322 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 418 transitions. [2021-05-03 14:35:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:13,322 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:13,322 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:13,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1866 [2021-05-03 14:35:13,523 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:13,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:13,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1107183336, now seen corresponding path program 230 times [2021-05-03 14:35:13,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:13,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951483221] [2021-05-03 14:35:13,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:13,849 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-05-03 14:35:13,991 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-05-03 14:35:14,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:14,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951483221] [2021-05-03 14:35:14,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846753127] [2021-05-03 14:35:14,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:14,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:35:14,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:14,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:35:14,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:14,842 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 14:35:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:15,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:15,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:35:15,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582636279] [2021-05-03 14:35:15,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:35:15,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:15,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:35:15,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:35:15,044 INFO L87 Difference]: Start difference. First operand 187 states and 418 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:15,341 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-05-03 14:35:15,657 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-05-03 14:35:16,160 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-05-03 14:35:16,587 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2021-05-03 14:35:16,972 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2021-05-03 14:35:17,298 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2021-05-03 14:35:17,517 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-03 14:35:17,736 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-05-03 14:35:17,927 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 25 [2021-05-03 14:35:18,201 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-05-03 14:35:18,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:18,235 INFO L93 Difference]: Finished difference Result 251 states and 520 transitions. [2021-05-03 14:35:18,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:35:18,237 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:18,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:18,237 INFO L225 Difference]: With dead ends: 251 [2021-05-03 14:35:18,237 INFO L226 Difference]: Without dead ends: 230 [2021-05-03 14:35:18,237 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 3687.6ms TimeCoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 14:35:18,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-05-03 14:35:18,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 191. [2021-05-03 14:35:18,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.2473684210526317) internal successors, (427), 190 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:18,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 427 transitions. [2021-05-03 14:35:18,239 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 427 transitions. Word has length 18 [2021-05-03 14:35:18,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:18,239 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 427 transitions. [2021-05-03 14:35:18,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:18,240 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 427 transitions. [2021-05-03 14:35:18,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:18,240 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:18,240 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:18,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1878 [2021-05-03 14:35:18,440 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:18,441 INFO L82 PathProgramCache]: Analyzing trace with hash -310447584, now seen corresponding path program 231 times [2021-05-03 14:35:18,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:18,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898027657] [2021-05-03 14:35:18,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:18,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898027657] [2021-05-03 14:35:18,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37637122] [2021-05-03 14:35:18,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:18,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:35:18,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:18,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 14:35:18,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:19,457 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 14:35:19,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:19,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:19,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:35:19,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676367211] [2021-05-03 14:35:19,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:35:19,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:19,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:35:19,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:35:19,790 INFO L87 Difference]: Start difference. First operand 191 states and 427 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:20,141 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2021-05-03 14:35:20,912 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2021-05-03 14:35:21,125 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 24 [2021-05-03 14:35:21,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:21,567 INFO L93 Difference]: Finished difference Result 251 states and 528 transitions. [2021-05-03 14:35:21,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:35:21,569 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:21,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:21,569 INFO L225 Difference]: With dead ends: 251 [2021-05-03 14:35:21,569 INFO L226 Difference]: Without dead ends: 229 [2021-05-03 14:35:21,569 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2124.5ms TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:35:21,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-03 14:35:21,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 191. [2021-05-03 14:35:21,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.2473684210526317) internal successors, (427), 190 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:21,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 427 transitions. [2021-05-03 14:35:21,572 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 427 transitions. Word has length 18 [2021-05-03 14:35:21,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:21,572 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 427 transitions. [2021-05-03 14:35:21,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:21,572 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 427 transitions. [2021-05-03 14:35:21,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:21,572 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:21,572 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:21,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1890,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:21,773 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:21,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:21,773 INFO L82 PathProgramCache]: Analyzing trace with hash 195898682, now seen corresponding path program 232 times [2021-05-03 14:35:21,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:21,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650241] [2021-05-03 14:35:21,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:22,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650241] [2021-05-03 14:35:22,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711013076] [2021-05-03 14:35:22,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:22,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:35:22,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:22,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:35:22,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:22,781 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:35:22,972 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 14:35:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:23,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:23,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:35:23,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539853805] [2021-05-03 14:35:23,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:35:23,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:23,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:35:23,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:35:23,387 INFO L87 Difference]: Start difference. First operand 191 states and 427 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:23,742 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2021-05-03 14:35:23,982 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-05-03 14:35:24,210 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-05-03 14:35:24,696 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-05-03 14:35:24,900 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-05-03 14:35:25,188 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-03 14:35:25,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:25,966 INFO L93 Difference]: Finished difference Result 260 states and 550 transitions. [2021-05-03 14:35:25,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:35:25,968 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:25,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:25,969 INFO L225 Difference]: With dead ends: 260 [2021-05-03 14:35:25,969 INFO L226 Difference]: Without dead ends: 241 [2021-05-03 14:35:25,969 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 3146.4ms TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:35:25,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-03 14:35:25,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 191. [2021-05-03 14:35:25,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.2473684210526317) internal successors, (427), 190 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:25,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 427 transitions. [2021-05-03 14:35:25,971 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 427 transitions. Word has length 18 [2021-05-03 14:35:25,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:25,971 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 427 transitions. [2021-05-03 14:35:25,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:25,972 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 427 transitions. [2021-05-03 14:35:25,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:25,972 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:25,972 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:26,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1901 [2021-05-03 14:35:26,172 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:26,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:26,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1287236256, now seen corresponding path program 233 times [2021-05-03 14:35:26,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:26,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942909857] [2021-05-03 14:35:26,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:26,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:26,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942909857] [2021-05-03 14:35:26,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676275806] [2021-05-03 14:35:26,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:26,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:35:26,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:26,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:35:26,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:27,342 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-05-03 14:35:27,520 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 14:35:27,698 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 14:35:27,932 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-05-03 14:35:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:28,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:28,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:35:28,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401122126] [2021-05-03 14:35:28,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:35:28,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:28,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:35:28,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:35:28,087 INFO L87 Difference]: Start difference. First operand 191 states and 427 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:28,594 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-05-03 14:35:28,979 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-05-03 14:35:29,543 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-05-03 14:35:29,967 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-03 14:35:30,317 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-03 14:35:30,549 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 24 [2021-05-03 14:35:30,794 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 14:35:31,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:31,223 INFO L93 Difference]: Finished difference Result 264 states and 558 transitions. [2021-05-03 14:35:31,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:35:31,225 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:31,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:31,225 INFO L225 Difference]: With dead ends: 264 [2021-05-03 14:35:31,225 INFO L226 Difference]: Without dead ends: 245 [2021-05-03 14:35:31,226 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 3844.0ms TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:35:31,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-03 14:35:31,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 195. [2021-05-03 14:35:31,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.2422680412371134) internal successors, (435), 194 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:31,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 435 transitions. [2021-05-03 14:35:31,228 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 435 transitions. Word has length 18 [2021-05-03 14:35:31,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:31,228 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 435 transitions. [2021-05-03 14:35:31,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:31,228 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 435 transitions. [2021-05-03 14:35:31,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:31,228 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:31,228 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:31,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1912,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:31,429 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:31,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:31,429 INFO L82 PathProgramCache]: Analyzing trace with hash -682872100, now seen corresponding path program 234 times [2021-05-03 14:35:31,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:31,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633793243] [2021-05-03 14:35:31,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:31,958 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 27 [2021-05-03 14:35:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:32,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633793243] [2021-05-03 14:35:32,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275053538] [2021-05-03 14:35:32,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:32,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:35:32,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:32,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 14:35:32,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:32,738 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:35:32,915 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-05-03 14:35:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:33,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:33,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:35:33,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960510202] [2021-05-03 14:35:33,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:35:33,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:33,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:35:33,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:35:33,134 INFO L87 Difference]: Start difference. First operand 195 states and 435 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:33,471 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-05-03 14:35:33,874 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-05-03 14:35:34,079 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-05-03 14:35:34,449 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-05-03 14:35:34,745 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-05-03 14:35:35,168 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-05-03 14:35:35,531 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-05-03 14:35:35,913 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 33 [2021-05-03 14:35:36,202 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 24 [2021-05-03 14:35:36,475 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-05-03 14:35:36,723 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-05-03 14:35:37,013 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-05-03 14:35:37,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:37,025 INFO L93 Difference]: Finished difference Result 287 states and 589 transitions. [2021-05-03 14:35:37,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:35:37,026 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:37,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:37,026 INFO L225 Difference]: With dead ends: 287 [2021-05-03 14:35:37,026 INFO L226 Difference]: Without dead ends: 258 [2021-05-03 14:35:37,026 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 4339.8ms TimeCoverageRelationStatistics Valid=196, Invalid=1364, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 14:35:37,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-05-03 14:35:37,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 193. [2021-05-03 14:35:37,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.2395833333333335) internal successors, (430), 192 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:37,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 430 transitions. [2021-05-03 14:35:37,028 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 430 transitions. Word has length 18 [2021-05-03 14:35:37,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:37,028 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 430 transitions. [2021-05-03 14:35:37,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:37,028 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 430 transitions. [2021-05-03 14:35:37,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:37,029 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:37,029 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:37,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1924 [2021-05-03 14:35:37,229 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:37,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:37,229 INFO L82 PathProgramCache]: Analyzing trace with hash 113863652, now seen corresponding path program 235 times [2021-05-03 14:35:37,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:37,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794023141] [2021-05-03 14:35:37,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:37,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794023141] [2021-05-03 14:35:37,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435598324] [2021-05-03 14:35:37,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:37,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:35:37,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:38,656 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:35:38,860 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-05-03 14:35:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:39,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:39,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:35:39,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293735162] [2021-05-03 14:35:39,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:35:39,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:39,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:35:39,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:35:39,078 INFO L87 Difference]: Start difference. First operand 193 states and 430 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:39,671 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-05-03 14:35:39,904 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-05-03 14:35:40,173 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-05-03 14:35:40,365 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 14:35:40,619 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 14:35:40,880 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-05-03 14:35:41,312 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-05-03 14:35:41,491 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 14:35:41,943 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 31 [2021-05-03 14:35:42,126 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-05-03 14:35:42,362 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 31 [2021-05-03 14:35:42,614 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 23 [2021-05-03 14:35:42,782 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-05-03 14:35:43,030 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2021-05-03 14:35:43,230 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 23 [2021-05-03 14:35:43,679 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 30 [2021-05-03 14:35:43,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:43,722 INFO L93 Difference]: Finished difference Result 318 states and 647 transitions. [2021-05-03 14:35:43,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:35:43,724 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:43,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:43,724 INFO L225 Difference]: With dead ends: 318 [2021-05-03 14:35:43,724 INFO L226 Difference]: Without dead ends: 249 [2021-05-03 14:35:43,725 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 5163.0ms TimeCoverageRelationStatistics Valid=308, Invalid=1762, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 14:35:43,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-03 14:35:43,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 197. [2021-05-03 14:35:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.2346938775510203) internal successors, (438), 196 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:43,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 438 transitions. [2021-05-03 14:35:43,727 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 438 transitions. Word has length 18 [2021-05-03 14:35:43,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:43,727 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 438 transitions. [2021-05-03 14:35:43,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:43,727 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 438 transitions. [2021-05-03 14:35:43,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:43,727 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:43,727 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:43,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1936,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:43,928 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:43,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:43,928 INFO L82 PathProgramCache]: Analyzing trace with hash 620209918, now seen corresponding path program 236 times [2021-05-03 14:35:43,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:43,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550428776] [2021-05-03 14:35:43,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:44,280 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-05-03 14:35:44,440 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-03 14:35:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:44,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550428776] [2021-05-03 14:35:44,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934163674] [2021-05-03 14:35:44,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:44,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:35:44,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:44,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:35:44,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:45,157 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 14:35:45,372 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 14:35:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:45,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:45,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:35:45,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694387840] [2021-05-03 14:35:45,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:35:45,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:45,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:35:45,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:35:45,718 INFO L87 Difference]: Start difference. First operand 197 states and 438 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:46,234 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-05-03 14:35:46,579 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-05-03 14:35:46,759 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-05-03 14:35:46,926 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-05-03 14:35:47,090 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-05-03 14:35:47,297 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-05-03 14:35:47,639 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2021-05-03 14:35:48,003 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2021-05-03 14:35:48,395 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-05-03 14:35:48,571 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 21 [2021-05-03 14:35:48,772 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 14:35:48,985 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-05-03 14:35:49,382 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2021-05-03 14:35:49,791 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-05-03 14:35:49,986 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-05-03 14:35:50,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:50,121 INFO L93 Difference]: Finished difference Result 298 states and 628 transitions. [2021-05-03 14:35:50,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:35:50,123 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:50,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:50,124 INFO L225 Difference]: With dead ends: 298 [2021-05-03 14:35:50,124 INFO L226 Difference]: Without dead ends: 266 [2021-05-03 14:35:50,124 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 5015.1ms TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 14:35:50,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-03 14:35:50,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 200. [2021-05-03 14:35:50,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.2311557788944723) internal successors, (444), 199 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:50,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 444 transitions. [2021-05-03 14:35:50,126 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 444 transitions. Word has length 18 [2021-05-03 14:35:50,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:50,126 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 444 transitions. [2021-05-03 14:35:50,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:50,126 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 444 transitions. [2021-05-03 14:35:50,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:50,126 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:50,127 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:50,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1947,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:50,327 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:50,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:50,327 INFO L82 PathProgramCache]: Analyzing trace with hash -862925020, now seen corresponding path program 237 times [2021-05-03 14:35:50,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:50,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886405193] [2021-05-03 14:35:50,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:50,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886405193] [2021-05-03 14:35:50,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175360365] [2021-05-03 14:35:50,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:50,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:35:50,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:50,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:35:50,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:51,417 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 14:35:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:51,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:51,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 14:35:51,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789826630] [2021-05-03 14:35:51,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:35:51,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:51,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:35:51,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:35:51,783 INFO L87 Difference]: Start difference. First operand 200 states and 444 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:52,269 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-05-03 14:35:52,526 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-05-03 14:35:52,946 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 14:35:53,302 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2021-05-03 14:35:53,595 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2021-05-03 14:35:53,925 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-05-03 14:35:54,140 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2021-05-03 14:35:54,381 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 21 [2021-05-03 14:35:54,735 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2021-05-03 14:35:55,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:55,205 INFO L93 Difference]: Finished difference Result 308 states and 631 transitions. [2021-05-03 14:35:55,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:35:55,208 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:55,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:55,208 INFO L225 Difference]: With dead ends: 308 [2021-05-03 14:35:55,208 INFO L226 Difference]: Without dead ends: 270 [2021-05-03 14:35:55,208 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3645.7ms TimeCoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 14:35:55,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-05-03 14:35:55,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 200. [2021-05-03 14:35:55,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.2311557788944723) internal successors, (444), 199 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:55,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 444 transitions. [2021-05-03 14:35:55,215 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 444 transitions. Word has length 18 [2021-05-03 14:35:55,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:55,215 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 444 transitions. [2021-05-03 14:35:55,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:55,215 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 444 transitions. [2021-05-03 14:35:55,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:55,216 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:55,216 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:55,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1957,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:55,440 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:55,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:55,440 INFO L82 PathProgramCache]: Analyzing trace with hash -17953568, now seen corresponding path program 238 times [2021-05-03 14:35:55,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:55,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164174349] [2021-05-03 14:35:55,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:55,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:55,637 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-05-03 14:35:55,760 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-03 14:35:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:56,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164174349] [2021-05-03 14:35:56,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731047941] [2021-05-03 14:35:56,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:56,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:35:56,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:56,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 14:35:56,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:56,719 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 14:35:57,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:57,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:57,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:57,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091352353] [2021-05-03 14:35:57,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:57,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:57,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:57,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:57,192 INFO L87 Difference]: Start difference. First operand 200 states and 444 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:57,520 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-05-03 14:35:57,752 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 21 [2021-05-03 14:35:58,002 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 35 [2021-05-03 14:35:58,324 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2021-05-03 14:35:58,579 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 26 [2021-05-03 14:35:58,929 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2021-05-03 14:35:59,222 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 29 [2021-05-03 14:35:59,821 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-05-03 14:36:00,131 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 29 [2021-05-03 14:36:00,453 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-05-03 14:36:00,819 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2021-05-03 14:36:01,182 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2021-05-03 14:36:01,365 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-05-03 14:36:01,549 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-05-03 14:36:01,925 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-05-03 14:36:01,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:01,927 INFO L93 Difference]: Finished difference Result 322 states and 666 transitions. [2021-05-03 14:36:01,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:36:01,927 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:36:01,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:01,927 INFO L225 Difference]: With dead ends: 322 [2021-05-03 14:36:01,927 INFO L226 Difference]: Without dead ends: 289 [2021-05-03 14:36:01,927 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 5222.7ms TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 14:36:01,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-05-03 14:36:01,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 202. [2021-05-03 14:36:01,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.228855721393035) internal successors, (448), 201 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:01,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 448 transitions. [2021-05-03 14:36:01,930 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 448 transitions. Word has length 18 [2021-05-03 14:36:01,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:01,930 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 448 transitions. [2021-05-03 14:36:01,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:01,930 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 448 transitions. [2021-05-03 14:36:01,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:01,930 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:01,930 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:02,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1967,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:02,131 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:02,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:02,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1401880791, now seen corresponding path program 239 times [2021-05-03 14:36:02,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:02,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433591460] [2021-05-03 14:36:02,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:02,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:02,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433591460] [2021-05-03 14:36:02,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153204730] [2021-05-03 14:36:02,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:02,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:36:02,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:02,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:36:02,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:02,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:02,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:36:02,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25672714] [2021-05-03 14:36:02,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:36:02,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:02,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:36:02,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:36:02,816 INFO L87 Difference]: Start difference. First operand 202 states and 448 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:03,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:03,399 INFO L93 Difference]: Finished difference Result 262 states and 559 transitions. [2021-05-03 14:36:03,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:36:03,400 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:03,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:03,401 INFO L225 Difference]: With dead ends: 262 [2021-05-03 14:36:03,401 INFO L226 Difference]: Without dead ends: 262 [2021-05-03 14:36:03,401 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 551.9ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:36:03,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-03 14:36:03,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 205. [2021-05-03 14:36:03,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2254901960784315) internal successors, (454), 204 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:03,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 454 transitions. [2021-05-03 14:36:03,403 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 454 transitions. Word has length 19 [2021-05-03 14:36:03,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:03,403 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 454 transitions. [2021-05-03 14:36:03,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:03,403 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 454 transitions. [2021-05-03 14:36:03,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:03,404 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:03,404 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:03,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1977 [2021-05-03 14:36:03,604 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:03,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:03,604 INFO L82 PathProgramCache]: Analyzing trace with hash 357408349, now seen corresponding path program 240 times [2021-05-03 14:36:03,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:03,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249942455] [2021-05-03 14:36:03,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:03,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249942455] [2021-05-03 14:36:03,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993931421] [2021-05-03 14:36:03,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:03,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:36:03,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:03,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 14:36:03,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:04,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:04,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:36:04,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052214292] [2021-05-03 14:36:04,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:36:04,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:04,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:36:04,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:36:04,640 INFO L87 Difference]: Start difference. First operand 205 states and 454 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:06,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:06,066 INFO L93 Difference]: Finished difference Result 287 states and 609 transitions. [2021-05-03 14:36:06,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:36:06,068 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:06,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:06,069 INFO L225 Difference]: With dead ends: 287 [2021-05-03 14:36:06,069 INFO L226 Difference]: Without dead ends: 287 [2021-05-03 14:36:06,069 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1603.8ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:36:06,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-05-03 14:36:06,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 205. [2021-05-03 14:36:06,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2254901960784315) internal successors, (454), 204 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:06,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 454 transitions. [2021-05-03 14:36:06,071 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 454 transitions. Word has length 19 [2021-05-03 14:36:06,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:06,071 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 454 transitions. [2021-05-03 14:36:06,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:06,071 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 454 transitions. [2021-05-03 14:36:06,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:06,072 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:06,072 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:06,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1982 [2021-05-03 14:36:06,272 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:06,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:06,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1516287333, now seen corresponding path program 241 times [2021-05-03 14:36:06,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:06,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164702471] [2021-05-03 14:36:06,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:06,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:06,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164702471] [2021-05-03 14:36:06,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423855255] [2021-05-03 14:36:06,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:06,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:36:06,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:07,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:07,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:36:07,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871186399] [2021-05-03 14:36:07,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:36:07,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:07,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:36:07,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:36:07,188 INFO L87 Difference]: Start difference. First operand 205 states and 454 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:07,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:07,829 INFO L93 Difference]: Finished difference Result 274 states and 583 transitions. [2021-05-03 14:36:07,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:36:07,831 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:07,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:07,832 INFO L225 Difference]: With dead ends: 274 [2021-05-03 14:36:07,832 INFO L226 Difference]: Without dead ends: 274 [2021-05-03 14:36:07,832 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 957.1ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:36:07,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-03 14:36:07,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 205. [2021-05-03 14:36:07,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2254901960784315) internal successors, (454), 204 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:07,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 454 transitions. [2021-05-03 14:36:07,834 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 454 transitions. Word has length 19 [2021-05-03 14:36:07,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:07,834 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 454 transitions. [2021-05-03 14:36:07,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:07,834 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 454 transitions. [2021-05-03 14:36:07,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:07,835 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:07,835 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:08,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1986,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:08,035 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:08,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:08,035 INFO L82 PathProgramCache]: Analyzing trace with hash -29839808, now seen corresponding path program 242 times [2021-05-03 14:36:08,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:08,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85749742] [2021-05-03 14:36:08,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:08,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85749742] [2021-05-03 14:36:08,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730677] [2021-05-03 14:36:08,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:08,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:36:08,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:08,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:36:08,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:08,502 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 14:36:08,816 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 14:36:08,987 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 14:36:09,190 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 14:36:09,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:09,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:09,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:36:09,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440150659] [2021-05-03 14:36:09,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:36:09,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:09,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:36:09,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:36:09,444 INFO L87 Difference]: Start difference. First operand 205 states and 454 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:09,849 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-03 14:36:10,250 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-05-03 14:36:10,459 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-05-03 14:36:10,596 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2021-05-03 14:36:10,779 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-05-03 14:36:10,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:10,795 INFO L93 Difference]: Finished difference Result 257 states and 545 transitions. [2021-05-03 14:36:10,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:36:10,797 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:10,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:10,797 INFO L225 Difference]: With dead ends: 257 [2021-05-03 14:36:10,797 INFO L226 Difference]: Without dead ends: 251 [2021-05-03 14:36:10,797 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2057.4ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:36:10,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-03 14:36:10,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 205. [2021-05-03 14:36:10,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2205882352941178) internal successors, (453), 204 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:10,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 453 transitions. [2021-05-03 14:36:10,799 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 453 transitions. Word has length 19 [2021-05-03 14:36:10,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:10,799 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 453 transitions. [2021-05-03 14:36:10,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:10,800 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 453 transitions. [2021-05-03 14:36:10,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:10,800 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:10,800 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:11,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1991 [2021-05-03 14:36:11,000 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:11,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:11,001 INFO L82 PathProgramCache]: Analyzing trace with hash 445291869, now seen corresponding path program 243 times [2021-05-03 14:36:11,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:11,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945374048] [2021-05-03 14:36:11,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:11,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945374048] [2021-05-03 14:36:11,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486300584] [2021-05-03 14:36:11,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:11,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:36:11,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:11,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:36:11,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:11,880 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 14:36:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:12,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:12,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:36:12,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628461188] [2021-05-03 14:36:12,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:36:12,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:12,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:36:12,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:36:12,058 INFO L87 Difference]: Start difference. First operand 205 states and 453 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:12,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:12,869 INFO L93 Difference]: Finished difference Result 271 states and 576 transitions. [2021-05-03 14:36:12,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:36:12,871 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:12,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:12,871 INFO L225 Difference]: With dead ends: 271 [2021-05-03 14:36:12,871 INFO L226 Difference]: Without dead ends: 271 [2021-05-03 14:36:12,872 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1186.9ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:36:12,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-05-03 14:36:12,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 205. [2021-05-03 14:36:12,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2205882352941178) internal successors, (453), 204 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:12,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 453 transitions. [2021-05-03 14:36:12,874 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 453 transitions. Word has length 19 [2021-05-03 14:36:12,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:12,874 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 453 transitions. [2021-05-03 14:36:12,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:12,874 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 453 transitions. [2021-05-03 14:36:12,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:12,874 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:12,874 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:13,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1998,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:13,075 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:13,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:13,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1682793182, now seen corresponding path program 244 times [2021-05-03 14:36:13,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:13,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596419281] [2021-05-03 14:36:13,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:13,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:13,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596419281] [2021-05-03 14:36:13,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824623907] [2021-05-03 14:36:13,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:13,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:36:13,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:13,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:36:13,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:13,720 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-05-03 14:36:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:14,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:14,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:36:14,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163165918] [2021-05-03 14:36:14,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:36:14,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:14,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:36:14,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:36:14,254 INFO L87 Difference]: Start difference. First operand 205 states and 453 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:14,646 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2021-05-03 14:36:15,190 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-05-03 14:36:15,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:15,272 INFO L93 Difference]: Finished difference Result 286 states and 589 transitions. [2021-05-03 14:36:15,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:36:15,274 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:15,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:15,274 INFO L225 Difference]: With dead ends: 286 [2021-05-03 14:36:15,274 INFO L226 Difference]: Without dead ends: 282 [2021-05-03 14:36:15,275 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1563.4ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:36:15,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-03 14:36:15,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 211. [2021-05-03 14:36:15,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2285714285714286) internal successors, (468), 210 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:15,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 468 transitions. [2021-05-03 14:36:15,277 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 468 transitions. Word has length 19 [2021-05-03 14:36:15,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:15,277 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 468 transitions. [2021-05-03 14:36:15,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:15,277 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 468 transitions. [2021-05-03 14:36:15,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:15,277 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:15,277 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:15,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2002 [2021-05-03 14:36:15,485 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:15,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:15,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1242027621, now seen corresponding path program 245 times [2021-05-03 14:36:15,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:15,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461958610] [2021-05-03 14:36:15,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:15,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:15,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:15,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461958610] [2021-05-03 14:36:15,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777786737] [2021-05-03 14:36:15,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:15,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:36:15,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:15,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:36:15,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:16,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:16,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:36:16,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660910967] [2021-05-03 14:36:16,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:36:16,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:16,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:36:16,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:36:16,441 INFO L87 Difference]: Start difference. First operand 211 states and 468 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:17,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:17,468 INFO L93 Difference]: Finished difference Result 274 states and 580 transitions. [2021-05-03 14:36:17,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:36:17,469 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:17,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:17,469 INFO L225 Difference]: With dead ends: 274 [2021-05-03 14:36:17,469 INFO L226 Difference]: Without dead ends: 271 [2021-05-03 14:36:17,469 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1181.3ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:36:17,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-05-03 14:36:17,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 211. [2021-05-03 14:36:17,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.223809523809524) internal successors, (467), 210 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:17,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 467 transitions. [2021-05-03 14:36:17,471 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 467 transitions. Word has length 19 [2021-05-03 14:36:17,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:17,471 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 467 transitions. [2021-05-03 14:36:17,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:17,471 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 467 transitions. [2021-05-03 14:36:17,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:17,472 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:17,472 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:17,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2009,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:17,672 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:17,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:17,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1034832384, now seen corresponding path program 246 times [2021-05-03 14:36:17,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:17,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478616744] [2021-05-03 14:36:17,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:17,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:17,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478616744] [2021-05-03 14:36:17,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539086101] [2021-05-03 14:36:17,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:17,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:36:17,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:17,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-03 14:36:17,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:18,382 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 14:36:18,552 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 14:36:18,725 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 14:36:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:18,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:18,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:36:18,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936792834] [2021-05-03 14:36:18,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:36:18,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:18,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:36:18,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:36:18,848 INFO L87 Difference]: Start difference. First operand 211 states and 467 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:19,282 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-05-03 14:36:19,777 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-05-03 14:36:19,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:19,832 INFO L93 Difference]: Finished difference Result 268 states and 561 transitions. [2021-05-03 14:36:19,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:36:19,834 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:19,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:19,835 INFO L225 Difference]: With dead ends: 268 [2021-05-03 14:36:19,835 INFO L226 Difference]: Without dead ends: 266 [2021-05-03 14:36:19,835 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1559.2ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:36:19,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-03 14:36:19,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 206. [2021-05-03 14:36:19,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2146341463414636) internal successors, (454), 205 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:19,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 454 transitions. [2021-05-03 14:36:19,837 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 454 transitions. Word has length 19 [2021-05-03 14:36:19,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:19,837 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 454 transitions. [2021-05-03 14:36:19,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:19,837 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 454 transitions. [2021-05-03 14:36:19,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:19,837 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:19,838 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:20,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2018 [2021-05-03 14:36:20,038 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:20,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:20,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1925543582, now seen corresponding path program 247 times [2021-05-03 14:36:20,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:20,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241788870] [2021-05-03 14:36:20,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:20,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241788870] [2021-05-03 14:36:20,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222131766] [2021-05-03 14:36:20,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:20,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:36:20,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:20,639 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-05-03 14:36:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:21,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:21,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:36:21,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164963148] [2021-05-03 14:36:21,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:36:21,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:21,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:36:21,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:36:21,115 INFO L87 Difference]: Start difference. First operand 206 states and 454 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:21,589 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 14:36:21,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:21,854 INFO L93 Difference]: Finished difference Result 255 states and 542 transitions. [2021-05-03 14:36:21,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:36:21,856 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:21,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:21,857 INFO L225 Difference]: With dead ends: 255 [2021-05-03 14:36:21,857 INFO L226 Difference]: Without dead ends: 255 [2021-05-03 14:36:21,857 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1201.2ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:36:21,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-03 14:36:21,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 205. [2021-05-03 14:36:21,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.215686274509804) internal successors, (452), 204 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:21,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 452 transitions. [2021-05-03 14:36:21,859 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 452 transitions. Word has length 19 [2021-05-03 14:36:21,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:21,859 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 452 transitions. [2021-05-03 14:36:21,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:21,859 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 452 transitions. [2021-05-03 14:36:21,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:21,859 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:21,859 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:22,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2028,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:22,060 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:22,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:22,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1418186439, now seen corresponding path program 248 times [2021-05-03 14:36:22,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:22,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402261298] [2021-05-03 14:36:22,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:22,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:22,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402261298] [2021-05-03 14:36:22,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001165776] [2021-05-03 14:36:22,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:22,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:36:22,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:22,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:36:22,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:22,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:22,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:36:22,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292375353] [2021-05-03 14:36:22,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:36:22,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:22,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:36:22,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:36:22,912 INFO L87 Difference]: Start difference. First operand 205 states and 452 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:23,749 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-05-03 14:36:24,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:24,132 INFO L93 Difference]: Finished difference Result 238 states and 514 transitions. [2021-05-03 14:36:24,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:36:24,134 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:24,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:24,134 INFO L225 Difference]: With dead ends: 238 [2021-05-03 14:36:24,134 INFO L226 Difference]: Without dead ends: 238 [2021-05-03 14:36:24,135 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1265.4ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:36:24,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-03 14:36:24,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 206. [2021-05-03 14:36:24,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2146341463414636) internal successors, (454), 205 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:24,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 454 transitions. [2021-05-03 14:36:24,137 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 454 transitions. Word has length 19 [2021-05-03 14:36:24,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:24,137 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 454 transitions. [2021-05-03 14:36:24,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:24,137 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 454 transitions. [2021-05-03 14:36:24,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:24,137 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:24,137 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:24,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2036 [2021-05-03 14:36:24,341 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:24,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:24,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1717901873, now seen corresponding path program 249 times [2021-05-03 14:36:24,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:24,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942795395] [2021-05-03 14:36:24,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:24,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942795395] [2021-05-03 14:36:24,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847657200] [2021-05-03 14:36:24,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:24,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:36:24,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:24,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:36:24,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:25,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:25,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:36:25,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95665481] [2021-05-03 14:36:25,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:36:25,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:25,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:36:25,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:36:25,366 INFO L87 Difference]: Start difference. First operand 206 states and 454 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:26,188 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-05-03 14:36:26,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:26,691 INFO L93 Difference]: Finished difference Result 251 states and 540 transitions. [2021-05-03 14:36:26,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:36:26,693 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:26,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:26,694 INFO L225 Difference]: With dead ends: 251 [2021-05-03 14:36:26,694 INFO L226 Difference]: Without dead ends: 251 [2021-05-03 14:36:26,694 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1466.4ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:36:26,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-03 14:36:26,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 207. [2021-05-03 14:36:26,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.2135922330097086) internal successors, (456), 206 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:26,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 456 transitions. [2021-05-03 14:36:26,696 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 456 transitions. Word has length 19 [2021-05-03 14:36:26,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:26,696 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 456 transitions. [2021-05-03 14:36:26,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:26,696 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 456 transitions. [2021-05-03 14:36:26,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:26,697 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:26,697 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:26,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2041,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:26,904 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:26,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:26,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1506069959, now seen corresponding path program 250 times [2021-05-03 14:36:26,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:26,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305008278] [2021-05-03 14:36:26,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:26,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:27,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305008278] [2021-05-03 14:36:27,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278025937] [2021-05-03 14:36:27,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:27,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:36:27,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:27,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:36:27,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:27,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:27,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:36:27,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145521476] [2021-05-03 14:36:27,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:36:27,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:27,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:36:27,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:36:27,909 INFO L87 Difference]: Start difference. First operand 207 states and 456 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:28,786 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-05-03 14:36:29,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:29,305 INFO L93 Difference]: Finished difference Result 249 states and 536 transitions. [2021-05-03 14:36:29,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:36:29,308 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:29,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:29,308 INFO L225 Difference]: With dead ends: 249 [2021-05-03 14:36:29,308 INFO L226 Difference]: Without dead ends: 249 [2021-05-03 14:36:29,309 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1481.4ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:36:29,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-03 14:36:29,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 208. [2021-05-03 14:36:29,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.21256038647343) internal successors, (458), 207 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:29,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 458 transitions. [2021-05-03 14:36:29,312 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 458 transitions. Word has length 19 [2021-05-03 14:36:29,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:29,312 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 458 transitions. [2021-05-03 14:36:29,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:29,312 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 458 transitions. [2021-05-03 14:36:29,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:29,312 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:29,313 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:29,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2046 [2021-05-03 14:36:29,517 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:29,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:29,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1992161585, now seen corresponding path program 251 times [2021-05-03 14:36:29,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:29,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850672923] [2021-05-03 14:36:29,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:29,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:29,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850672923] [2021-05-03 14:36:29,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536455619] [2021-05-03 14:36:29,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:29,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:36:29,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:29,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:36:29,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:30,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:30,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:30,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:36:30,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086348493] [2021-05-03 14:36:30,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:36:30,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:30,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:36:30,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:36:30,531 INFO L87 Difference]: Start difference. First operand 208 states and 458 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:31,402 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-05-03 14:36:32,079 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-05-03 14:36:32,255 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-03 14:36:32,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:32,570 INFO L93 Difference]: Finished difference Result 288 states and 596 transitions. [2021-05-03 14:36:32,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:36:32,572 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:32,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:32,573 INFO L225 Difference]: With dead ends: 288 [2021-05-03 14:36:32,573 INFO L226 Difference]: Without dead ends: 288 [2021-05-03 14:36:32,573 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 2041.3ms TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:36:32,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-05-03 14:36:32,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 209. [2021-05-03 14:36:32,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2211538461538463) internal successors, (462), 208 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:32,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 462 transitions. [2021-05-03 14:36:32,575 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 462 transitions. Word has length 19 [2021-05-03 14:36:32,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:32,575 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 462 transitions. [2021-05-03 14:36:32,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:32,575 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 462 transitions. [2021-05-03 14:36:32,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:32,576 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:32,576 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:32,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2051 [2021-05-03 14:36:32,776 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:32,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:32,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1515850139, now seen corresponding path program 252 times [2021-05-03 14:36:32,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:32,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346261926] [2021-05-03 14:36:32,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:33,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346261926] [2021-05-03 14:36:33,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846006440] [2021-05-03 14:36:33,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:33,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:36:33,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:33,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:36:33,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:33,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:33,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:33,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:36:33,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553963508] [2021-05-03 14:36:33,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:36:33,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:33,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:36:33,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:36:33,798 INFO L87 Difference]: Start difference. First operand 209 states and 462 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:34,730 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-05-03 14:36:35,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:35,296 INFO L93 Difference]: Finished difference Result 246 states and 527 transitions. [2021-05-03 14:36:35,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:36:35,298 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:35,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:35,298 INFO L225 Difference]: With dead ends: 246 [2021-05-03 14:36:35,298 INFO L226 Difference]: Without dead ends: 243 [2021-05-03 14:36:35,298 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1650.3ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:36:35,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-03 14:36:35,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 209. [2021-05-03 14:36:35,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2163461538461537) internal successors, (461), 208 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:35,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 461 transitions. [2021-05-03 14:36:35,300 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 461 transitions. Word has length 19 [2021-05-03 14:36:35,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:35,301 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 461 transitions. [2021-05-03 14:36:35,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:35,301 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 461 transitions. [2021-05-03 14:36:35,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:35,301 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:35,301 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:35,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2060,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:35,502 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:35,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:35,502 INFO L82 PathProgramCache]: Analyzing trace with hash -864765492, now seen corresponding path program 253 times [2021-05-03 14:36:35,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:35,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885147615] [2021-05-03 14:36:35,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:35,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:35,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885147615] [2021-05-03 14:36:35,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905457541] [2021-05-03 14:36:35,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:35,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:36:35,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:36,321 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-03 14:36:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:36,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:36,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:36:36,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462659176] [2021-05-03 14:36:36,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:36:36,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:36,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:36:36,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:36:36,760 INFO L87 Difference]: Start difference. First operand 209 states and 461 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:37,384 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-05-03 14:36:37,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:37,887 INFO L93 Difference]: Finished difference Result 245 states and 520 transitions. [2021-05-03 14:36:37,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:36:37,888 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:37,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:37,888 INFO L225 Difference]: With dead ends: 245 [2021-05-03 14:36:37,888 INFO L226 Difference]: Without dead ends: 245 [2021-05-03 14:36:37,889 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1615.0ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:36:37,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-03 14:36:37,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 209. [2021-05-03 14:36:37,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2163461538461537) internal successors, (461), 208 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:37,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 461 transitions. [2021-05-03 14:36:37,890 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 461 transitions. Word has length 19 [2021-05-03 14:36:37,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:37,890 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 461 transitions. [2021-05-03 14:36:37,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:37,891 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 461 transitions. [2021-05-03 14:36:37,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:37,891 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:37,891 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:38,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2070,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:38,091 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:38,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:38,092 INFO L82 PathProgramCache]: Analyzing trace with hash -450444695, now seen corresponding path program 254 times [2021-05-03 14:36:38,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:38,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036548428] [2021-05-03 14:36:38,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:38,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:38,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036548428] [2021-05-03 14:36:38,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122975480] [2021-05-03 14:36:38,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:38,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:36:38,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:38,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 14:36:38,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:39,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:39,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:36:39,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257334832] [2021-05-03 14:36:39,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:36:39,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:39,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:36:39,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:36:39,372 INFO L87 Difference]: Start difference. First operand 209 states and 461 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:39,652 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-03 14:36:40,083 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-05-03 14:36:40,275 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-05-03 14:36:40,468 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-03 14:36:40,734 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-05-03 14:36:41,056 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-05-03 14:36:41,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:41,569 INFO L93 Difference]: Finished difference Result 254 states and 547 transitions. [2021-05-03 14:36:41,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:36:41,571 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:41,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:41,571 INFO L225 Difference]: With dead ends: 254 [2021-05-03 14:36:41,572 INFO L226 Difference]: Without dead ends: 254 [2021-05-03 14:36:41,572 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 2430.8ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:36:41,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-03 14:36:41,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 211. [2021-05-03 14:36:41,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2142857142857144) internal successors, (465), 210 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:41,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 465 transitions. [2021-05-03 14:36:41,574 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 465 transitions. Word has length 19 [2021-05-03 14:36:41,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:41,574 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 465 transitions. [2021-05-03 14:36:41,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:41,574 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 465 transitions. [2021-05-03 14:36:41,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:41,574 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:41,574 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:41,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2078 [2021-05-03 14:36:41,775 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:41,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:41,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1521440159, now seen corresponding path program 255 times [2021-05-03 14:36:41,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:41,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551334673] [2021-05-03 14:36:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:42,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:42,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551334673] [2021-05-03 14:36:42,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904738328] [2021-05-03 14:36:42,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:42,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:36:42,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:42,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-03 14:36:42,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:42,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:42,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:42,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:36:42,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119804239] [2021-05-03 14:36:42,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:36:42,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:42,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:36:42,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:36:42,876 INFO L87 Difference]: Start difference. First operand 211 states and 465 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:43,306 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-05-03 14:36:43,624 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-05-03 14:36:43,833 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-05-03 14:36:44,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:44,319 INFO L93 Difference]: Finished difference Result 255 states and 549 transitions. [2021-05-03 14:36:44,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:36:44,321 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:44,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:44,322 INFO L225 Difference]: With dead ends: 255 [2021-05-03 14:36:44,322 INFO L226 Difference]: Without dead ends: 255 [2021-05-03 14:36:44,322 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1753.5ms TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:36:44,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-03 14:36:44,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 212. [2021-05-03 14:36:44,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.213270142180095) internal successors, (467), 211 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:44,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 467 transitions. [2021-05-03 14:36:44,324 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 467 transitions. Word has length 19 [2021-05-03 14:36:44,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:44,324 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 467 transitions. [2021-05-03 14:36:44,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:44,324 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 467 transitions. [2021-05-03 14:36:44,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:44,325 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:44,325 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:44,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2082,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:44,525 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:44,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:44,525 INFO L82 PathProgramCache]: Analyzing trace with hash -724704407, now seen corresponding path program 256 times [2021-05-03 14:36:44,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:44,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080730915] [2021-05-03 14:36:44,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:44,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080730915] [2021-05-03 14:36:44,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090018800] [2021-05-03 14:36:44,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:44,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:36:44,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:44,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:36:44,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:45,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:45,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:36:45,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082294410] [2021-05-03 14:36:45,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:36:45,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:45,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:36:45,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:36:45,620 INFO L87 Difference]: Start difference. First operand 212 states and 467 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:46,065 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2021-05-03 14:36:46,499 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-05-03 14:36:46,811 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-05-03 14:36:47,127 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-05-03 14:36:47,443 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 14:36:48,044 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 14:36:48,703 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-05-03 14:36:49,017 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2021-05-03 14:36:49,226 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-05-03 14:36:49,395 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-05-03 14:36:49,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:49,540 INFO L93 Difference]: Finished difference Result 315 states and 653 transitions. [2021-05-03 14:36:49,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 14:36:49,541 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:49,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:49,541 INFO L225 Difference]: With dead ends: 315 [2021-05-03 14:36:49,541 INFO L226 Difference]: Without dead ends: 315 [2021-05-03 14:36:49,541 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 3680.0ms TimeCoverageRelationStatistics Valid=230, Invalid=1492, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 14:36:49,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-05-03 14:36:49,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 221. [2021-05-03 14:36:49,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2409090909090907) internal successors, (493), 220 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:49,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 493 transitions. [2021-05-03 14:36:49,544 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 493 transitions. Word has length 19 [2021-05-03 14:36:49,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:49,544 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 493 transitions. [2021-05-03 14:36:49,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:49,544 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 493 transitions. [2021-05-03 14:36:49,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:49,544 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:49,544 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:49,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2087,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:49,749 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:49,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:49,749 INFO L82 PathProgramCache]: Analyzing trace with hash 402691686, now seen corresponding path program 257 times [2021-05-03 14:36:49,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:49,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031079212] [2021-05-03 14:36:49,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:50,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031079212] [2021-05-03 14:36:50,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659790739] [2021-05-03 14:36:50,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:50,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:36:50,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:50,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:36:50,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:50,726 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-05-03 14:36:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:51,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:51,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:36:51,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055973916] [2021-05-03 14:36:51,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:36:51,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:51,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:36:51,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:36:51,011 INFO L87 Difference]: Start difference. First operand 221 states and 493 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:51,619 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-05-03 14:36:51,807 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-05-03 14:36:52,022 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-05-03 14:36:52,279 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-05-03 14:36:52,554 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-05-03 14:36:53,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:53,029 INFO L93 Difference]: Finished difference Result 253 states and 549 transitions. [2021-05-03 14:36:53,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:36:53,031 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:53,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:53,031 INFO L225 Difference]: With dead ends: 253 [2021-05-03 14:36:53,031 INFO L226 Difference]: Without dead ends: 251 [2021-05-03 14:36:53,031 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2272.2ms TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:36:53,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-03 14:36:53,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 221. [2021-05-03 14:36:53,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2363636363636363) internal successors, (492), 220 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:53,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 492 transitions. [2021-05-03 14:36:53,034 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 492 transitions. Word has length 19 [2021-05-03 14:36:53,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:53,034 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 492 transitions. [2021-05-03 14:36:53,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:53,034 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 492 transitions. [2021-05-03 14:36:53,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:53,035 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:53,035 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:53,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2096,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:53,249 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:53,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:53,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1290392199, now seen corresponding path program 258 times [2021-05-03 14:36:53,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:53,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263738193] [2021-05-03 14:36:53,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:53,556 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:36:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:53,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263738193] [2021-05-03 14:36:53,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780875404] [2021-05-03 14:36:53,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:53,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:36:53,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:53,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:36:53,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:54,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:54,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:36:54,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711658413] [2021-05-03 14:36:54,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:36:54,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:54,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:36:54,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:36:54,194 INFO L87 Difference]: Start difference. First operand 221 states and 492 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:54,504 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-05-03 14:36:54,788 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2021-05-03 14:36:54,943 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-05-03 14:36:55,313 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-05-03 14:36:55,465 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-05-03 14:36:55,667 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-05-03 14:36:55,834 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 14:36:56,290 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-05-03 14:36:56,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:56,541 INFO L93 Difference]: Finished difference Result 264 states and 574 transitions. [2021-05-03 14:36:56,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:36:56,544 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:56,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:56,545 INFO L225 Difference]: With dead ends: 264 [2021-05-03 14:36:56,545 INFO L226 Difference]: Without dead ends: 264 [2021-05-03 14:36:56,545 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 2408.4ms TimeCoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:36:56,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-03 14:36:56,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 223. [2021-05-03 14:36:56,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.234234234234234) internal successors, (496), 222 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:56,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 496 transitions. [2021-05-03 14:36:56,547 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 496 transitions. Word has length 19 [2021-05-03 14:36:56,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:56,547 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 496 transitions. [2021-05-03 14:36:56,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:56,547 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 496 transitions. [2021-05-03 14:36:56,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:56,548 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:56,548 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:56,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2104 [2021-05-03 14:36:56,748 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:56,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:56,748 INFO L82 PathProgramCache]: Analyzing trace with hash 2087127951, now seen corresponding path program 259 times [2021-05-03 14:36:56,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:56,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048702349] [2021-05-03 14:36:56,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:57,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048702349] [2021-05-03 14:36:57,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601638862] [2021-05-03 14:36:57,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:57,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:57,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:36:57,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:57,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:57,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:57,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:36:57,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115557448] [2021-05-03 14:36:57,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:36:57,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:57,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:36:57,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:36:57,707 INFO L87 Difference]: Start difference. First operand 223 states and 496 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:58,054 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 14:36:58,347 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-05-03 14:36:58,523 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-05-03 14:36:58,976 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-03 14:36:59,146 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-05-03 14:36:59,461 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-05-03 14:36:59,624 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-05-03 14:37:00,100 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-05-03 14:37:00,601 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-03 14:37:00,772 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 14:37:00,913 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 14:37:01,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:01,151 INFO L93 Difference]: Finished difference Result 314 states and 656 transitions. [2021-05-03 14:37:01,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:37:01,151 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:01,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:01,151 INFO L225 Difference]: With dead ends: 314 [2021-05-03 14:37:01,151 INFO L226 Difference]: Without dead ends: 314 [2021-05-03 14:37:01,152 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 3429.1ms TimeCoverageRelationStatistics Valid=199, Invalid=1283, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 14:37:01,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-05-03 14:37:01,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 226. [2021-05-03 14:37:01,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.24) internal successors, (504), 225 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:01,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 504 transitions. [2021-05-03 14:37:01,154 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 504 transitions. Word has length 19 [2021-05-03 14:37:01,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:01,154 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 504 transitions. [2021-05-03 14:37:01,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:01,154 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 504 transitions. [2021-05-03 14:37:01,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:01,154 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:01,154 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:01,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2109,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:01,355 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:01,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:01,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1731527899, now seen corresponding path program 260 times [2021-05-03 14:37:01,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:01,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431405075] [2021-05-03 14:37:01,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:01,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:01,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431405075] [2021-05-03 14:37:01,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082282723] [2021-05-03 14:37:01,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:01,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:37:01,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:01,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-03 14:37:01,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:02,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:02,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:37:02,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117652169] [2021-05-03 14:37:02,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:37:02,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:02,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:37:02,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:37:02,630 INFO L87 Difference]: Start difference. First operand 226 states and 504 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:02,933 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-03 14:37:03,122 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 14:37:03,647 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-05-03 14:37:04,008 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-05-03 14:37:04,221 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-05-03 14:37:04,442 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-05-03 14:37:04,797 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-05-03 14:37:05,022 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-05-03 14:37:05,580 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 14:37:05,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:05,892 INFO L93 Difference]: Finished difference Result 272 states and 587 transitions. [2021-05-03 14:37:05,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:37:05,895 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:05,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:05,895 INFO L225 Difference]: With dead ends: 272 [2021-05-03 14:37:05,895 INFO L226 Difference]: Without dead ends: 269 [2021-05-03 14:37:05,895 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3587.5ms TimeCoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:37:05,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-05-03 14:37:05,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 226. [2021-05-03 14:37:05,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.2355555555555555) internal successors, (503), 225 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:05,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 503 transitions. [2021-05-03 14:37:05,898 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 503 transitions. Word has length 19 [2021-05-03 14:37:05,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:05,898 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 503 transitions. [2021-05-03 14:37:05,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:05,898 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 503 transitions. [2021-05-03 14:37:05,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:05,898 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:05,898 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:06,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2118 [2021-05-03 14:37:06,099 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:06,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:06,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1080443252, now seen corresponding path program 261 times [2021-05-03 14:37:06,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:06,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817650995] [2021-05-03 14:37:06,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:06,389 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:37:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:06,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817650995] [2021-05-03 14:37:06,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15525938] [2021-05-03 14:37:06,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:06,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:37:06,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:06,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 14:37:06,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:07,471 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 14:37:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:07,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:07,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:37:07,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197511869] [2021-05-03 14:37:07,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:37:07,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:07,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:37:07,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:37:07,632 INFO L87 Difference]: Start difference. First operand 226 states and 503 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:07,926 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-03 14:37:08,089 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-05-03 14:37:08,565 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-05-03 14:37:08,869 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-05-03 14:37:09,052 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-05-03 14:37:09,203 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-05-03 14:37:09,587 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-05-03 14:37:09,862 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-05-03 14:37:10,198 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-05-03 14:37:10,561 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 14:37:10,742 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-05-03 14:37:11,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:11,284 INFO L93 Difference]: Finished difference Result 282 states and 602 transitions. [2021-05-03 14:37:11,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:37:11,285 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:11,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:11,285 INFO L225 Difference]: With dead ends: 282 [2021-05-03 14:37:11,285 INFO L226 Difference]: Without dead ends: 282 [2021-05-03 14:37:11,286 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 4214.9ms TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 14:37:11,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-03 14:37:11,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 225. [2021-05-03 14:37:11,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.2410714285714284) internal successors, (502), 224 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:11,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 502 transitions. [2021-05-03 14:37:11,288 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 502 transitions. Word has length 19 [2021-05-03 14:37:11,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:11,288 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 502 transitions. [2021-05-03 14:37:11,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:11,288 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 502 transitions. [2021-05-03 14:37:11,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:11,288 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:11,288 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:11,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2126,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:11,489 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:11,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:11,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1701493079, now seen corresponding path program 262 times [2021-05-03 14:37:11,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:11,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921629949] [2021-05-03 14:37:11,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:11,807 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:37:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:11,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921629949] [2021-05-03 14:37:11,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695569929] [2021-05-03 14:37:11,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:11,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:37:11,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:11,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:37:11,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:12,785 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 14:37:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:12,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:12,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:37:12,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186062422] [2021-05-03 14:37:12,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:37:12,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:12,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:37:12,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:37:12,921 INFO L87 Difference]: Start difference. First operand 225 states and 502 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:13,254 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-05-03 14:37:13,528 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2021-05-03 14:37:14,120 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-05-03 14:37:14,369 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-05-03 14:37:14,556 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-05-03 14:37:14,760 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 14:37:14,996 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-05-03 14:37:15,130 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-05-03 14:37:15,463 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-03 14:37:15,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:15,589 INFO L93 Difference]: Finished difference Result 262 states and 572 transitions. [2021-05-03 14:37:15,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:37:15,590 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:15,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:15,590 INFO L225 Difference]: With dead ends: 262 [2021-05-03 14:37:15,590 INFO L226 Difference]: Without dead ends: 262 [2021-05-03 14:37:15,590 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 3177.4ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:37:15,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-03 14:37:15,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 225. [2021-05-03 14:37:15,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.2410714285714284) internal successors, (502), 224 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:15,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 502 transitions. [2021-05-03 14:37:15,593 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 502 transitions. Word has length 19 [2021-05-03 14:37:15,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:15,593 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 502 transitions. [2021-05-03 14:37:15,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:15,593 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 502 transitions. [2021-05-03 14:37:15,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:15,593 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:15,593 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:15,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2132,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:15,793 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:15,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:15,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1413942844, now seen corresponding path program 263 times [2021-05-03 14:37:15,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:15,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79330722] [2021-05-03 14:37:15,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:16,094 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-05-03 14:37:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:16,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79330722] [2021-05-03 14:37:16,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999187454] [2021-05-03 14:37:16,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:16,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:37:16,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:16,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:37:16,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:17,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:17,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:37:17,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841021184] [2021-05-03 14:37:17,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:37:17,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:17,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:37:17,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:37:17,016 INFO L87 Difference]: Start difference. First operand 225 states and 502 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:17,331 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-05-03 14:37:17,587 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 20 [2021-05-03 14:37:17,751 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-05-03 14:37:18,213 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 14:37:18,578 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-05-03 14:37:18,755 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-05-03 14:37:19,075 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-05-03 14:37:19,521 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 14:37:20,115 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 14:37:20,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:20,233 INFO L93 Difference]: Finished difference Result 331 states and 694 transitions. [2021-05-03 14:37:20,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:37:20,235 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:20,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:20,235 INFO L225 Difference]: With dead ends: 331 [2021-05-03 14:37:20,235 INFO L226 Difference]: Without dead ends: 331 [2021-05-03 14:37:20,236 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 3282.4ms TimeCoverageRelationStatistics Valid=169, Invalid=1313, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 14:37:20,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-05-03 14:37:20,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 228. [2021-05-03 14:37:20,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.251101321585903) internal successors, (511), 227 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 511 transitions. [2021-05-03 14:37:20,238 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 511 transitions. Word has length 19 [2021-05-03 14:37:20,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:20,238 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 511 transitions. [2021-05-03 14:37:20,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:20,238 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 511 transitions. [2021-05-03 14:37:20,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:20,239 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:20,239 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:20,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2140 [2021-05-03 14:37:20,439 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:20,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:20,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1111952564, now seen corresponding path program 264 times [2021-05-03 14:37:20,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:20,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344827469] [2021-05-03 14:37:20,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:20,735 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-05-03 14:37:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:20,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344827469] [2021-05-03 14:37:20,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974496116] [2021-05-03 14:37:20,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:20,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:37:20,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:20,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:37:20,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:21,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:21,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:37:21,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798479297] [2021-05-03 14:37:21,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:37:21,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:21,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:37:21,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:37:21,722 INFO L87 Difference]: Start difference. First operand 228 states and 511 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:22,023 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-05-03 14:37:22,280 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 20 [2021-05-03 14:37:22,460 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-05-03 14:37:22,935 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 14:37:23,300 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-05-03 14:37:23,716 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-05-03 14:37:24,012 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 14:37:24,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:24,447 INFO L93 Difference]: Finished difference Result 282 states and 612 transitions. [2021-05-03 14:37:24,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:37:24,450 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:24,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:24,450 INFO L225 Difference]: With dead ends: 282 [2021-05-03 14:37:24,450 INFO L226 Difference]: Without dead ends: 282 [2021-05-03 14:37:24,450 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2892.1ms TimeCoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 14:37:24,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-03 14:37:24,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 226. [2021-05-03 14:37:24,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.24) internal successors, (504), 225 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:24,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 504 transitions. [2021-05-03 14:37:24,453 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 504 transitions. Word has length 19 [2021-05-03 14:37:24,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:24,453 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 504 transitions. [2021-05-03 14:37:24,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:24,453 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 504 transitions. [2021-05-03 14:37:24,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:24,453 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:24,453 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:24,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2149 [2021-05-03 14:37:24,654 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:24,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:24,654 INFO L82 PathProgramCache]: Analyzing trace with hash -57431139, now seen corresponding path program 265 times [2021-05-03 14:37:24,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:24,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894151921] [2021-05-03 14:37:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:25,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894151921] [2021-05-03 14:37:25,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557809407] [2021-05-03 14:37:25,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:25,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:37:25,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:25,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:25,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:25,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:37:25,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422372746] [2021-05-03 14:37:25,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:37:25,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:25,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:37:25,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:37:25,774 INFO L87 Difference]: Start difference. First operand 226 states and 504 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:26,505 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-05-03 14:37:26,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:26,936 INFO L93 Difference]: Finished difference Result 248 states and 546 transitions. [2021-05-03 14:37:26,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:37:26,939 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:26,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:26,939 INFO L225 Difference]: With dead ends: 248 [2021-05-03 14:37:26,939 INFO L226 Difference]: Without dead ends: 248 [2021-05-03 14:37:26,939 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1450.1ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:37:26,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-03 14:37:26,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 226. [2021-05-03 14:37:26,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.24) internal successors, (504), 225 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:26,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 504 transitions. [2021-05-03 14:37:26,941 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 504 transitions. Word has length 19 [2021-05-03 14:37:26,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:26,941 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 504 transitions. [2021-05-03 14:37:26,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:26,941 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 504 transitions. [2021-05-03 14:37:26,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:26,942 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:26,942 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:27,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2154,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:27,142 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:27,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:27,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1101447845, now seen corresponding path program 266 times [2021-05-03 14:37:27,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:27,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121685793] [2021-05-03 14:37:27,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:27,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121685793] [2021-05-03 14:37:27,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777989832] [2021-05-03 14:37:27,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:27,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:37:27,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:27,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-03 14:37:27,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:28,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:28,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:37:28,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109031929] [2021-05-03 14:37:28,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:37:28,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:28,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:37:28,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:37:28,220 INFO L87 Difference]: Start difference. First operand 226 states and 504 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:28,550 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-03 14:37:28,914 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-05-03 14:37:29,231 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-05-03 14:37:29,524 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-05-03 14:37:29,817 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-05-03 14:37:30,049 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-05-03 14:37:30,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:30,873 INFO L93 Difference]: Finished difference Result 264 states and 578 transitions. [2021-05-03 14:37:30,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:37:30,876 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:30,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:30,876 INFO L225 Difference]: With dead ends: 264 [2021-05-03 14:37:30,876 INFO L226 Difference]: Without dead ends: 264 [2021-05-03 14:37:30,876 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2844.7ms TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:37:30,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-03 14:37:30,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 226. [2021-05-03 14:37:30,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.24) internal successors, (504), 225 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:30,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 504 transitions. [2021-05-03 14:37:30,879 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 504 transitions. Word has length 19 [2021-05-03 14:37:30,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:30,879 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 504 transitions. [2021-05-03 14:37:30,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:30,879 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 504 transitions. [2021-05-03 14:37:30,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:30,879 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:30,879 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:31,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2159,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:31,080 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:31,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:31,080 INFO L82 PathProgramCache]: Analyzing trace with hash 30452381, now seen corresponding path program 267 times [2021-05-03 14:37:31,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:31,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015584104] [2021-05-03 14:37:31,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:31,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015584104] [2021-05-03 14:37:31,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220138903] [2021-05-03 14:37:31,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:31,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:37:31,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:31,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:37:31,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:32,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:32,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:32,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:37:32,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985392103] [2021-05-03 14:37:32,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:37:32,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:32,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:37:32,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:37:32,277 INFO L87 Difference]: Start difference. First operand 226 states and 504 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:32,823 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-05-03 14:37:33,084 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-05-03 14:37:33,322 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-05-03 14:37:33,554 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 14:37:33,796 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-05-03 14:37:34,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:34,586 INFO L93 Difference]: Finished difference Result 267 states and 584 transitions. [2021-05-03 14:37:34,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:37:34,589 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:34,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:34,589 INFO L225 Difference]: With dead ends: 267 [2021-05-03 14:37:34,589 INFO L226 Difference]: Without dead ends: 267 [2021-05-03 14:37:34,589 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 2334.0ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:37:34,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-05-03 14:37:34,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 227. [2021-05-03 14:37:34,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.2389380530973453) internal successors, (506), 226 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:34,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 506 transitions. [2021-05-03 14:37:34,592 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 506 transitions. Word has length 19 [2021-05-03 14:37:34,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:34,592 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 506 transitions. [2021-05-03 14:37:34,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:34,592 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 506 transitions. [2021-05-03 14:37:34,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:34,592 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:34,592 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:34,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2162,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:34,793 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:34,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:34,793 INFO L82 PathProgramCache]: Analyzing trace with hash 827188133, now seen corresponding path program 268 times [2021-05-03 14:37:34,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:34,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769242780] [2021-05-03 14:37:34,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:34,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769242780] [2021-05-03 14:37:34,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461693602] [2021-05-03 14:37:34,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:34,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:37:34,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:34,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:37:34,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:35,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:35,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:35,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:37:35,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658805863] [2021-05-03 14:37:35,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:37:35,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:35,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:37:35,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:37:35,884 INFO L87 Difference]: Start difference. First operand 227 states and 506 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:36,721 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2021-05-03 14:37:37,000 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-05-03 14:37:37,223 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-05-03 14:37:37,476 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 14:37:37,711 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-05-03 14:37:37,970 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 14:37:38,704 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-05-03 14:37:38,965 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-03 14:37:39,150 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 14:37:39,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:39,281 INFO L93 Difference]: Finished difference Result 297 states and 632 transitions. [2021-05-03 14:37:39,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:37:39,284 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:39,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:39,285 INFO L225 Difference]: With dead ends: 297 [2021-05-03 14:37:39,285 INFO L226 Difference]: Without dead ends: 297 [2021-05-03 14:37:39,285 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 3255.5ms TimeCoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:37:39,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-05-03 14:37:39,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 228. [2021-05-03 14:37:39,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.246696035242291) internal successors, (510), 227 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:39,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 510 transitions. [2021-05-03 14:37:39,287 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 510 transitions. Word has length 19 [2021-05-03 14:37:39,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:39,288 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 510 transitions. [2021-05-03 14:37:39,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:39,288 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 510 transitions. [2021-05-03 14:37:39,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:39,288 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:39,288 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:39,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2167 [2021-05-03 14:37:39,488 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:39,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:39,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1303499579, now seen corresponding path program 269 times [2021-05-03 14:37:39,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:39,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191560096] [2021-05-03 14:37:39,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:39,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:39,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191560096] [2021-05-03 14:37:39,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185492181] [2021-05-03 14:37:39,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:39,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:37:39,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:39,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:37:39,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:40,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:40,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:37:40,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805917282] [2021-05-03 14:37:40,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:37:40,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:40,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:37:40,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:37:40,800 INFO L87 Difference]: Start difference. First operand 228 states and 510 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:41,224 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2021-05-03 14:37:41,382 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-05-03 14:37:41,669 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-05-03 14:37:41,934 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-05-03 14:37:42,175 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-05-03 14:37:42,413 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 14:37:42,656 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-05-03 14:37:42,898 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 14:37:43,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:43,314 INFO L93 Difference]: Finished difference Result 263 states and 572 transitions. [2021-05-03 14:37:43,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:37:43,316 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:43,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:43,317 INFO L225 Difference]: With dead ends: 263 [2021-05-03 14:37:43,317 INFO L226 Difference]: Without dead ends: 260 [2021-05-03 14:37:43,317 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 2782.3ms TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:37:43,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-03 14:37:43,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 228. [2021-05-03 14:37:43,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.2422907488986783) internal successors, (509), 227 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:43,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 509 transitions. [2021-05-03 14:37:43,319 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 509 transitions. Word has length 19 [2021-05-03 14:37:43,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:43,320 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 509 transitions. [2021-05-03 14:37:43,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:43,320 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 509 transitions. [2021-05-03 14:37:43,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:43,320 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:43,320 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:43,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2176,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:43,521 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:43,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:43,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1954584226, now seen corresponding path program 270 times [2021-05-03 14:37:43,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:43,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974335816] [2021-05-03 14:37:43,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:43,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:43,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974335816] [2021-05-03 14:37:43,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751018230] [2021-05-03 14:37:43,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:43,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:37:43,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:43,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-03 14:37:43,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:44,392 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 14:37:44,590 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 14:37:44,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:44,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:44,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:37:44,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861171377] [2021-05-03 14:37:44,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:37:44,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:44,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:37:44,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:37:44,827 INFO L87 Difference]: Start difference. First operand 228 states and 509 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:45,247 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-05-03 14:37:45,579 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-05-03 14:37:46,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:46,255 INFO L93 Difference]: Finished difference Result 249 states and 546 transitions. [2021-05-03 14:37:46,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:37:46,258 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:46,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:46,258 INFO L225 Difference]: With dead ends: 249 [2021-05-03 14:37:46,258 INFO L226 Difference]: Without dead ends: 247 [2021-05-03 14:37:46,259 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1773.0ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:37:46,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-03 14:37:46,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 224. [2021-05-03 14:37:46,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.242152466367713) internal successors, (500), 223 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:46,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 500 transitions. [2021-05-03 14:37:46,261 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 500 transitions. Word has length 19 [2021-05-03 14:37:46,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:46,261 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 500 transitions. [2021-05-03 14:37:46,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:46,261 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 500 transitions. [2021-05-03 14:37:46,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:46,261 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:46,261 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:46,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2186,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:46,462 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:46,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:46,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1926062273, now seen corresponding path program 271 times [2021-05-03 14:37:46,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:46,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506428784] [2021-05-03 14:37:46,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:46,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506428784] [2021-05-03 14:37:46,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414031606] [2021-05-03 14:37:46,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:46,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:37:46,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:47,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:47,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:47,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:37:47,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83626312] [2021-05-03 14:37:47,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:37:47,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:47,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:37:47,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:37:47,633 INFO L87 Difference]: Start difference. First operand 224 states and 500 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:48,399 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-05-03 14:37:49,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:49,093 INFO L93 Difference]: Finished difference Result 260 states and 569 transitions. [2021-05-03 14:37:49,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:37:49,096 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:49,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:49,096 INFO L225 Difference]: With dead ends: 260 [2021-05-03 14:37:49,096 INFO L226 Difference]: Without dead ends: 260 [2021-05-03 14:37:49,097 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1569.4ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:37:49,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-03 14:37:49,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 223. [2021-05-03 14:37:49,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.2387387387387387) internal successors, (497), 222 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:49,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 497 transitions. [2021-05-03 14:37:49,099 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 497 transitions. Word has length 19 [2021-05-03 14:37:49,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:49,099 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 497 transitions. [2021-05-03 14:37:49,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:49,099 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 497 transitions. [2021-05-03 14:37:49,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:49,099 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:49,099 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:49,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2195,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:49,300 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:49,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:49,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1297909559, now seen corresponding path program 272 times [2021-05-03 14:37:49,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:49,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652581909] [2021-05-03 14:37:49,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:49,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652581909] [2021-05-03 14:37:49,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598876994] [2021-05-03 14:37:49,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:49,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:37:49,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:49,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:37:49,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:50,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:50,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:37:50,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503356578] [2021-05-03 14:37:50,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:37:50,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:50,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:37:50,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:37:50,607 INFO L87 Difference]: Start difference. First operand 223 states and 497 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:51,208 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2021-05-03 14:37:51,584 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 14:37:51,864 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 14:37:52,230 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2021-05-03 14:37:52,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:52,672 INFO L93 Difference]: Finished difference Result 260 states and 564 transitions. [2021-05-03 14:37:52,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:37:52,673 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:52,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:52,673 INFO L225 Difference]: With dead ends: 260 [2021-05-03 14:37:52,673 INFO L226 Difference]: Without dead ends: 260 [2021-05-03 14:37:52,673 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 2474.4ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:37:52,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-03 14:37:52,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 216. [2021-05-03 14:37:52,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.2232558139534886) internal successors, (478), 215 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:52,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 478 transitions. [2021-05-03 14:37:52,675 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 478 transitions. Word has length 19 [2021-05-03 14:37:52,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:52,675 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 478 transitions. [2021-05-03 14:37:52,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:52,675 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 478 transitions. [2021-05-03 14:37:52,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:52,675 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:52,676 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:52,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2200 [2021-05-03 14:37:52,876 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:52,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:52,876 INFO L82 PathProgramCache]: Analyzing trace with hash 611510373, now seen corresponding path program 273 times [2021-05-03 14:37:52,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:52,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893738294] [2021-05-03 14:37:52,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:53,236 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:37:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:53,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893738294] [2021-05-03 14:37:53,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560380347] [2021-05-03 14:37:53,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:53,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:37:53,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:53,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-03 14:37:53,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:54,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:54,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:37:54,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947098870] [2021-05-03 14:37:54,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:37:54,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:54,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:37:54,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:37:54,220 INFO L87 Difference]: Start difference. First operand 216 states and 478 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:54,599 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 14:37:54,771 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-05-03 14:37:54,982 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-05-03 14:37:55,371 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 14:37:55,652 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-05-03 14:37:56,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:56,315 INFO L93 Difference]: Finished difference Result 259 states and 557 transitions. [2021-05-03 14:37:56,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:37:56,317 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:56,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:56,318 INFO L225 Difference]: With dead ends: 259 [2021-05-03 14:37:56,318 INFO L226 Difference]: Without dead ends: 256 [2021-05-03 14:37:56,318 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 2371.5ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:37:56,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-03 14:37:56,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 212. [2021-05-03 14:37:56,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2180094786729856) internal successors, (468), 211 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:56,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 468 transitions. [2021-05-03 14:37:56,320 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 468 transitions. Word has length 19 [2021-05-03 14:37:56,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:56,320 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 468 transitions. [2021-05-03 14:37:56,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:56,320 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 468 transitions. [2021-05-03 14:37:56,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:56,320 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:56,321 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:56,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2205,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:56,521 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:56,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:56,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1289595419, now seen corresponding path program 274 times [2021-05-03 14:37:56,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:56,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069530275] [2021-05-03 14:37:56,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:56,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:56,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069530275] [2021-05-03 14:37:56,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064030355] [2021-05-03 14:37:56,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:56,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:37:56,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:56,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:37:56,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:57,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:57,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:37:57,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222721114] [2021-05-03 14:37:57,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:37:57,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:57,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:37:57,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:37:57,733 INFO L87 Difference]: Start difference. First operand 212 states and 468 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:58,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:58,392 INFO L93 Difference]: Finished difference Result 243 states and 528 transitions. [2021-05-03 14:37:58,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:37:58,393 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:58,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:58,393 INFO L225 Difference]: With dead ends: 243 [2021-05-03 14:37:58,393 INFO L226 Difference]: Without dead ends: 243 [2021-05-03 14:37:58,393 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 998.9ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:37:58,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-03 14:37:58,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 212. [2021-05-03 14:37:58,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2180094786729856) internal successors, (468), 211 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:58,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 468 transitions. [2021-05-03 14:37:58,395 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 468 transitions. Word has length 19 [2021-05-03 14:37:58,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:58,395 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 468 transitions. [2021-05-03 14:37:58,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:58,395 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 468 transitions. [2021-05-03 14:37:58,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:58,395 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:58,395 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:58,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2214,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:58,597 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:58,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:58,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1934376413, now seen corresponding path program 275 times [2021-05-03 14:37:58,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:58,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919720644] [2021-05-03 14:37:58,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:59,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919720644] [2021-05-03 14:37:59,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496109610] [2021-05-03 14:37:59,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:59,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:37:59,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:59,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-03 14:37:59,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:59,270 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 14:37:59,438 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 14:37:59,628 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 14:37:59,828 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 14:38:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:00,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:00,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:00,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885076886] [2021-05-03 14:38:00,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:00,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:00,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:00,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:00,312 INFO L87 Difference]: Start difference. First operand 212 states and 468 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:01,268 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-05-03 14:38:01,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:01,557 INFO L93 Difference]: Finished difference Result 257 states and 556 transitions. [2021-05-03 14:38:01,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:38:01,560 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:01,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:01,561 INFO L225 Difference]: With dead ends: 257 [2021-05-03 14:38:01,561 INFO L226 Difference]: Without dead ends: 257 [2021-05-03 14:38:01,561 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1991.8ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:38:01,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-05-03 14:38:01,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 212. [2021-05-03 14:38:01,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2180094786729856) internal successors, (468), 211 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:01,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 468 transitions. [2021-05-03 14:38:01,563 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 468 transitions. Word has length 19 [2021-05-03 14:38:01,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:01,563 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 468 transitions. [2021-05-03 14:38:01,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:01,563 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 468 transitions. [2021-05-03 14:38:01,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:01,563 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:01,563 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:01,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2219 [2021-05-03 14:38:01,764 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:01,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:01,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1563855131, now seen corresponding path program 276 times [2021-05-03 14:38:01,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:01,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436141821] [2021-05-03 14:38:01,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:02,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436141821] [2021-05-03 14:38:02,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827592143] [2021-05-03 14:38:02,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:02,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:38:02,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:02,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:38:02,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:02,470 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 14:38:02,637 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 14:38:02,813 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 14:38:03,020 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 14:38:03,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:03,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:03,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:38:03,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129553790] [2021-05-03 14:38:03,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:38:03,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:03,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:38:03,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:03,200 INFO L87 Difference]: Start difference. First operand 212 states and 468 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:03,770 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-05-03 14:38:04,255 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-05-03 14:38:04,505 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-05-03 14:38:04,705 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-05-03 14:38:05,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:05,283 INFO L93 Difference]: Finished difference Result 267 states and 571 transitions. [2021-05-03 14:38:05,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:38:05,285 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:05,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:05,285 INFO L225 Difference]: With dead ends: 267 [2021-05-03 14:38:05,285 INFO L226 Difference]: Without dead ends: 264 [2021-05-03 14:38:05,286 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 2511.8ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:38:05,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-03 14:38:05,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 212. [2021-05-03 14:38:05,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.213270142180095) internal successors, (467), 211 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:05,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 467 transitions. [2021-05-03 14:38:05,288 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 467 transitions. Word has length 19 [2021-05-03 14:38:05,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:05,288 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 467 transitions. [2021-05-03 14:38:05,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:05,288 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 467 transitions. [2021-05-03 14:38:05,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:05,288 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:05,288 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:05,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2222 [2021-05-03 14:38:05,489 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:05,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:05,489 INFO L82 PathProgramCache]: Analyzing trace with hash -436459038, now seen corresponding path program 277 times [2021-05-03 14:38:05,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:05,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884398071] [2021-05-03 14:38:05,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:05,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884398071] [2021-05-03 14:38:05,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867126397] [2021-05-03 14:38:05,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:05,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:38:05,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:06,048 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 14:38:06,212 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 14:38:06,395 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 14:38:06,821 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 14:38:07,019 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 14:38:07,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:07,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:07,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:07,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853916915] [2021-05-03 14:38:07,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:07,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:07,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:07,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:07,167 INFO L87 Difference]: Start difference. First operand 212 states and 467 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:07,724 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-05-03 14:38:07,989 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-03 14:38:08,185 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2021-05-03 14:38:08,820 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-05-03 14:38:08,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:08,924 INFO L93 Difference]: Finished difference Result 271 states and 574 transitions. [2021-05-03 14:38:08,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:38:08,927 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:08,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:08,928 INFO L225 Difference]: With dead ends: 271 [2021-05-03 14:38:08,928 INFO L226 Difference]: Without dead ends: 271 [2021-05-03 14:38:08,928 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2504.9ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:38:08,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-05-03 14:38:08,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 208. [2021-05-03 14:38:08,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.2028985507246377) internal successors, (456), 207 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:08,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 456 transitions. [2021-05-03 14:38:08,930 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 456 transitions. Word has length 19 [2021-05-03 14:38:08,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:08,930 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 456 transitions. [2021-05-03 14:38:08,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:08,930 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 456 transitions. [2021-05-03 14:38:08,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:08,930 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:08,930 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:09,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2229 [2021-05-03 14:38:09,131 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:09,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:09,131 INFO L82 PathProgramCache]: Analyzing trace with hash 451241475, now seen corresponding path program 278 times [2021-05-03 14:38:09,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:09,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39724544] [2021-05-03 14:38:09,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:09,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:09,457 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:38:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:09,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39724544] [2021-05-03 14:38:09,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549345925] [2021-05-03 14:38:09,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:09,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:38:09,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:09,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:38:09,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:10,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:10,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:10,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581687978] [2021-05-03 14:38:10,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:10,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:10,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:10,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:10,140 INFO L87 Difference]: Start difference. First operand 208 states and 456 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:10,604 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 14:38:10,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:10,912 INFO L93 Difference]: Finished difference Result 234 states and 506 transitions. [2021-05-03 14:38:10,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:38:10,915 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:10,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:10,916 INFO L225 Difference]: With dead ends: 234 [2021-05-03 14:38:10,916 INFO L226 Difference]: Without dead ends: 234 [2021-05-03 14:38:10,916 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1148.0ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:38:10,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-03 14:38:10,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 210. [2021-05-03 14:38:10,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.200956937799043) internal successors, (460), 209 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:10,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 460 transitions. [2021-05-03 14:38:10,918 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 460 transitions. Word has length 19 [2021-05-03 14:38:10,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:10,918 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 460 transitions. [2021-05-03 14:38:10,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:10,918 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 460 transitions. [2021-05-03 14:38:10,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:10,918 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:10,918 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:11,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2236,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:11,119 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:11,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:11,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1247977227, now seen corresponding path program 279 times [2021-05-03 14:38:11,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:11,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294774840] [2021-05-03 14:38:11,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:11,462 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:38:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:11,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294774840] [2021-05-03 14:38:11,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417019317] [2021-05-03 14:38:11,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:11,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:38:11,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:11,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-03 14:38:11,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:12,017 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 14:38:12,210 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 14:38:12,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:12,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:12,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:38:12,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140936895] [2021-05-03 14:38:12,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:38:12,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:12,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:38:12,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:12,527 INFO L87 Difference]: Start difference. First operand 210 states and 460 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:13,583 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-05-03 14:38:13,811 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-05-03 14:38:14,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:14,321 INFO L93 Difference]: Finished difference Result 250 states and 535 transitions. [2021-05-03 14:38:14,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:38:14,323 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:14,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:14,324 INFO L225 Difference]: With dead ends: 250 [2021-05-03 14:38:14,324 INFO L226 Difference]: Without dead ends: 247 [2021-05-03 14:38:14,324 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 2002.9ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:38:14,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-03 14:38:14,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 211. [2021-05-03 14:38:14,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.204761904761905) internal successors, (463), 210 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:14,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 463 transitions. [2021-05-03 14:38:14,326 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 463 transitions. Word has length 19 [2021-05-03 14:38:14,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:14,326 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 463 transitions. [2021-05-03 14:38:14,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:14,326 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 463 transitions. [2021-05-03 14:38:14,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:14,326 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:14,326 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:14,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2241,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:14,528 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:14,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:14,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1919593976, now seen corresponding path program 280 times [2021-05-03 14:38:14,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:14,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116629537] [2021-05-03 14:38:14,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:14,865 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-05-03 14:38:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:14,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116629537] [2021-05-03 14:38:14,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55476712] [2021-05-03 14:38:14,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:15,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:38:15,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:15,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:38:15,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:15,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:15,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:15,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909574488] [2021-05-03 14:38:15,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:15,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:15,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:15,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:15,687 INFO L87 Difference]: Start difference. First operand 211 states and 463 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:16,003 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-05-03 14:38:16,427 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 14:38:16,745 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-05-03 14:38:17,120 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-05-03 14:38:17,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:17,300 INFO L93 Difference]: Finished difference Result 256 states and 542 transitions. [2021-05-03 14:38:17,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:38:17,303 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:17,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:17,303 INFO L225 Difference]: With dead ends: 256 [2021-05-03 14:38:17,304 INFO L226 Difference]: Without dead ends: 256 [2021-05-03 14:38:17,304 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 2019.4ms TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:38:17,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-03 14:38:17,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 209. [2021-05-03 14:38:17,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.201923076923077) internal successors, (458), 208 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:17,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 458 transitions. [2021-05-03 14:38:17,306 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 458 transitions. Word has length 19 [2021-05-03 14:38:17,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:17,306 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 458 transitions. [2021-05-03 14:38:17,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:17,306 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 458 transitions. [2021-05-03 14:38:17,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:17,306 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:17,306 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:17,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2249 [2021-05-03 14:38:17,507 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:17,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:17,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1754323493, now seen corresponding path program 281 times [2021-05-03 14:38:17,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:17,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523926967] [2021-05-03 14:38:17,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:17,817 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:38:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:17,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523926967] [2021-05-03 14:38:17,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746970082] [2021-05-03 14:38:17,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:17,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:38:17,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:17,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 14:38:17,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:18,289 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 14:38:18,469 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 14:38:18,681 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 14:38:19,180 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:38:19,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:19,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:19,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:19,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084075186] [2021-05-03 14:38:19,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:19,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:19,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:19,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:19,351 INFO L87 Difference]: Start difference. First operand 209 states and 458 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:20,475 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-05-03 14:38:20,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:20,576 INFO L93 Difference]: Finished difference Result 251 states and 533 transitions. [2021-05-03 14:38:20,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:38:20,579 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:20,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:20,579 INFO L225 Difference]: With dead ends: 251 [2021-05-03 14:38:20,579 INFO L226 Difference]: Without dead ends: 251 [2021-05-03 14:38:20,579 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2242.1ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:38:20,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-03 14:38:20,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 210. [2021-05-03 14:38:20,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2057416267942584) internal successors, (461), 209 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:20,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 461 transitions. [2021-05-03 14:38:20,581 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 461 transitions. Word has length 19 [2021-05-03 14:38:20,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:20,582 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 461 transitions. [2021-05-03 14:38:20,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:20,582 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 461 transitions. [2021-05-03 14:38:20,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:20,582 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:20,582 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:20,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2257 [2021-05-03 14:38:20,782 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:20,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:20,783 INFO L82 PathProgramCache]: Analyzing trace with hash 2041873728, now seen corresponding path program 282 times [2021-05-03 14:38:20,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:20,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511193788] [2021-05-03 14:38:20,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:21,127 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-05-03 14:38:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:21,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511193788] [2021-05-03 14:38:21,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589274568] [2021-05-03 14:38:21,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:21,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:38:21,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:21,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:38:21,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:21,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:21,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:21,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895818965] [2021-05-03 14:38:21,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:21,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:21,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:21,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:21,926 INFO L87 Difference]: Start difference. First operand 210 states and 461 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:23,220 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-05-03 14:38:23,413 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 14:38:23,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:23,527 INFO L93 Difference]: Finished difference Result 314 states and 649 transitions. [2021-05-03 14:38:23,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:38:23,529 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:23,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:23,529 INFO L225 Difference]: With dead ends: 314 [2021-05-03 14:38:23,529 INFO L226 Difference]: Without dead ends: 314 [2021-05-03 14:38:23,529 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1845.7ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:38:23,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-05-03 14:38:23,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 212. [2021-05-03 14:38:23,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2180094786729856) internal successors, (468), 211 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:23,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 468 transitions. [2021-05-03 14:38:23,531 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 468 transitions. Word has length 19 [2021-05-03 14:38:23,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:23,532 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 468 transitions. [2021-05-03 14:38:23,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:23,532 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 468 transitions. [2021-05-03 14:38:23,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:23,532 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:23,532 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:23,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2264,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:23,742 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:23,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:23,742 INFO L82 PathProgramCache]: Analyzing trace with hash 81838403, now seen corresponding path program 283 times [2021-05-03 14:38:23,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:23,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991430598] [2021-05-03 14:38:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:23,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:24,088 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-05-03 14:38:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:24,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991430598] [2021-05-03 14:38:24,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898268894] [2021-05-03 14:38:24,198 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:24,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:38:24,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:25,121 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 14:38:25,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:25,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:25,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:25,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124506155] [2021-05-03 14:38:25,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:25,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:25,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:25,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:25,273 INFO L87 Difference]: Start difference. First operand 212 states and 468 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:26,163 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-05-03 14:38:26,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:26,228 INFO L93 Difference]: Finished difference Result 238 states and 513 transitions. [2021-05-03 14:38:26,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:38:26,230 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:26,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:26,230 INFO L225 Difference]: With dead ends: 238 [2021-05-03 14:38:26,230 INFO L226 Difference]: Without dead ends: 232 [2021-05-03 14:38:26,230 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1669.5ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:38:26,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-03 14:38:26,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 212. [2021-05-03 14:38:26,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.213270142180095) internal successors, (467), 211 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:26,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 467 transitions. [2021-05-03 14:38:26,232 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 467 transitions. Word has length 19 [2021-05-03 14:38:26,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:26,232 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 467 transitions. [2021-05-03 14:38:26,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:26,232 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 467 transitions. [2021-05-03 14:38:26,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:26,233 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:26,233 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:26,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2272,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:26,433 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:26,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:26,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1951103288, now seen corresponding path program 284 times [2021-05-03 14:38:26,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:26,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875626004] [2021-05-03 14:38:26,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:26,761 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:38:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:26,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875626004] [2021-05-03 14:38:26,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35538445] [2021-05-03 14:38:26,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:26,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:38:26,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:26,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:38:26,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:27,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:27,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:27,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424951935] [2021-05-03 14:38:27,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:27,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:27,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:27,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:27,686 INFO L87 Difference]: Start difference. First operand 212 states and 467 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:27,874 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-05-03 14:38:28,391 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-05-03 14:38:28,689 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-05-03 14:38:28,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:28,914 INFO L93 Difference]: Finished difference Result 255 states and 548 transitions. [2021-05-03 14:38:28,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:38:28,917 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:28,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:28,917 INFO L225 Difference]: With dead ends: 255 [2021-05-03 14:38:28,917 INFO L226 Difference]: Without dead ends: 255 [2021-05-03 14:38:28,918 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1690.9ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:38:28,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-03 14:38:28,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 208. [2021-05-03 14:38:28,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.2028985507246377) internal successors, (456), 207 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:28,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 456 transitions. [2021-05-03 14:38:28,921 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 456 transitions. Word has length 19 [2021-05-03 14:38:28,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:28,921 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 456 transitions. [2021-05-03 14:38:28,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:28,921 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 456 transitions. [2021-05-03 14:38:28,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:28,921 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:28,921 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:29,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2280 [2021-05-03 14:38:29,136 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:29,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:29,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1718698653, now seen corresponding path program 285 times [2021-05-03 14:38:29,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:29,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877865565] [2021-05-03 14:38:29,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:29,471 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-05-03 14:38:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:29,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877865565] [2021-05-03 14:38:29,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541441595] [2021-05-03 14:38:29,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:29,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:38:29,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:29,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-03 14:38:29,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:29,810 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 14:38:29,974 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 14:38:30,227 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 14:38:30,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:30,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:30,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:30,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323513039] [2021-05-03 14:38:30,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:30,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:30,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:30,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:30,772 INFO L87 Difference]: Start difference. First operand 208 states and 456 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:31,163 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 14:38:31,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:31,646 INFO L93 Difference]: Finished difference Result 247 states and 532 transitions. [2021-05-03 14:38:31,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:38:31,649 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:31,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:31,650 INFO L225 Difference]: With dead ends: 247 [2021-05-03 14:38:31,650 INFO L226 Difference]: Without dead ends: 247 [2021-05-03 14:38:31,650 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1770.9ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:38:31,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-03 14:38:31,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 210. [2021-05-03 14:38:31,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.200956937799043) internal successors, (460), 209 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:31,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 460 transitions. [2021-05-03 14:38:31,652 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 460 transitions. Word has length 19 [2021-05-03 14:38:31,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:31,652 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 460 transitions. [2021-05-03 14:38:31,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:31,652 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 460 transitions. [2021-05-03 14:38:31,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:31,652 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:31,652 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:31,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2285,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:31,853 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:31,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:31,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1779532891, now seen corresponding path program 286 times [2021-05-03 14:38:31,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:31,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924459985] [2021-05-03 14:38:31,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:32,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:32,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924459985] [2021-05-03 14:38:32,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144982890] [2021-05-03 14:38:32,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:32,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:38:32,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:32,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:38:32,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:33,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:33,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:33,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791919827] [2021-05-03 14:38:33,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:33,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:33,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:33,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:33,082 INFO L87 Difference]: Start difference. First operand 210 states and 460 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:34,321 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-05-03 14:38:34,521 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-05-03 14:38:34,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:34,883 INFO L93 Difference]: Finished difference Result 288 states and 596 transitions. [2021-05-03 14:38:34,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:38:34,886 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:34,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:34,887 INFO L225 Difference]: With dead ends: 288 [2021-05-03 14:38:34,887 INFO L226 Difference]: Without dead ends: 288 [2021-05-03 14:38:34,887 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1950.4ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:38:34,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-05-03 14:38:34,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 211. [2021-05-03 14:38:34,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2095238095238097) internal successors, (464), 210 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:34,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 464 transitions. [2021-05-03 14:38:34,889 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 464 transitions. Word has length 19 [2021-05-03 14:38:34,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:34,889 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 464 transitions. [2021-05-03 14:38:34,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:34,889 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 464 transitions. [2021-05-03 14:38:34,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:34,890 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:34,890 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:35,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2288 [2021-05-03 14:38:35,090 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:35,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:35,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1303221445, now seen corresponding path program 287 times [2021-05-03 14:38:35,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:35,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590221532] [2021-05-03 14:38:35,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:35,458 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:38:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:35,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590221532] [2021-05-03 14:38:35,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100472576] [2021-05-03 14:38:35,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:35,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:38:35,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:35,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:38:35,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:36,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:36,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:36,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:36,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480360646] [2021-05-03 14:38:36,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:36,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:36,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:36,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:36,444 INFO L87 Difference]: Start difference. First operand 211 states and 464 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:37,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:37,558 INFO L93 Difference]: Finished difference Result 242 states and 519 transitions. [2021-05-03 14:38:37,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:38:37,561 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:37,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:37,561 INFO L225 Difference]: With dead ends: 242 [2021-05-03 14:38:37,561 INFO L226 Difference]: Without dead ends: 239 [2021-05-03 14:38:37,562 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1391.2ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:38:37,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-05-03 14:38:37,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 211. [2021-05-03 14:38:37,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.204761904761905) internal successors, (463), 210 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:37,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 463 transitions. [2021-05-03 14:38:37,564 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 463 transitions. Word has length 19 [2021-05-03 14:38:37,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:37,564 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 463 transitions. [2021-05-03 14:38:37,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:37,564 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 463 transitions. [2021-05-03 14:38:37,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:37,564 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:37,564 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:37,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2297,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:37,765 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:37,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:37,765 INFO L82 PathProgramCache]: Analyzing trace with hash -652136798, now seen corresponding path program 288 times [2021-05-03 14:38:37,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:37,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718493479] [2021-05-03 14:38:37,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:38,110 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:38:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:38,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718493479] [2021-05-03 14:38:38,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384939029] [2021-05-03 14:38:38,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:38,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:38:38,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:38,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 14:38:38,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:38,960 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 14:38:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:39,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:39,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:38:39,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8151568] [2021-05-03 14:38:39,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:38:39,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:39,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:38:39,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:39,048 INFO L87 Difference]: Start difference. First operand 211 states and 463 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:40,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:40,016 INFO L93 Difference]: Finished difference Result 241 states and 518 transitions. [2021-05-03 14:38:40,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:38:40,018 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:40,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:40,019 INFO L225 Difference]: With dead ends: 241 [2021-05-03 14:38:40,019 INFO L226 Difference]: Without dead ends: 239 [2021-05-03 14:38:40,019 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1485.7ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:38:40,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-05-03 14:38:40,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 209. [2021-05-03 14:38:40,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.201923076923077) internal successors, (458), 208 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:40,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 458 transitions. [2021-05-03 14:38:40,021 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 458 transitions. Word has length 19 [2021-05-03 14:38:40,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:40,021 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 458 transitions. [2021-05-03 14:38:40,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:40,021 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 458 transitions. [2021-05-03 14:38:40,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:40,021 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:40,021 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:40,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2307,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:40,222 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:40,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:40,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1273186625, now seen corresponding path program 289 times [2021-05-03 14:38:40,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:40,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722851782] [2021-05-03 14:38:40,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:40,582 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:38:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:40,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722851782] [2021-05-03 14:38:40,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870151453] [2021-05-03 14:38:40,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:40,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:38:40,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:41,055 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 14:38:41,248 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 14:38:41,444 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 14:38:42,070 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 14:38:42,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:42,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:42,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:42,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303341707] [2021-05-03 14:38:42,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:42,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:42,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:42,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:42,221 INFO L87 Difference]: Start difference. First operand 209 states and 458 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:42,963 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-05-03 14:38:43,169 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 14:38:43,637 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:38:43,980 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 14:38:44,466 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-05-03 14:38:44,747 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-05-03 14:38:45,071 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-05-03 14:38:45,297 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 18 [2021-05-03 14:38:45,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:45,300 INFO L93 Difference]: Finished difference Result 263 states and 551 transitions. [2021-05-03 14:38:45,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:38:45,300 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:45,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:45,300 INFO L225 Difference]: With dead ends: 263 [2021-05-03 14:38:45,300 INFO L226 Difference]: Without dead ends: 263 [2021-05-03 14:38:45,300 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 4093.3ms TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:38:45,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-05-03 14:38:45,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 210. [2021-05-03 14:38:45,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2057416267942584) internal successors, (461), 209 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:45,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 461 transitions. [2021-05-03 14:38:45,302 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 461 transitions. Word has length 19 [2021-05-03 14:38:45,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:45,303 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 461 transitions. [2021-05-03 14:38:45,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:45,303 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 461 transitions. [2021-05-03 14:38:45,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:45,303 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:45,303 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:45,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2316 [2021-05-03 14:38:45,503 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:45,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:45,504 INFO L82 PathProgramCache]: Analyzing trace with hash -985636390, now seen corresponding path program 290 times [2021-05-03 14:38:45,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:45,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060453630] [2021-05-03 14:38:45,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:45,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:45,842 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:38:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:45,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060453630] [2021-05-03 14:38:45,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511187760] [2021-05-03 14:38:45,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:46,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:38:46,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:46,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-03 14:38:46,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:46,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:46,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:38:46,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296106769] [2021-05-03 14:38:46,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:38:46,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:46,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:38:46,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:46,904 INFO L87 Difference]: Start difference. First operand 210 states and 461 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:47,408 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 14:38:47,744 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-05-03 14:38:47,913 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-05-03 14:38:48,165 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2021-05-03 14:38:48,707 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2021-05-03 14:38:48,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:48,747 INFO L93 Difference]: Finished difference Result 302 states and 632 transitions. [2021-05-03 14:38:48,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:38:48,749 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:48,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:48,750 INFO L225 Difference]: With dead ends: 302 [2021-05-03 14:38:48,750 INFO L226 Difference]: Without dead ends: 302 [2021-05-03 14:38:48,750 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 2358.9ms TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:38:48,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-05-03 14:38:48,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 212. [2021-05-03 14:38:48,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2180094786729856) internal successors, (468), 211 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:48,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 468 transitions. [2021-05-03 14:38:48,752 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 468 transitions. Word has length 19 [2021-05-03 14:38:48,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:48,752 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 468 transitions. [2021-05-03 14:38:48,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:48,752 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 468 transitions. [2021-05-03 14:38:48,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:48,752 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:48,753 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:48,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2323 [2021-05-03 14:38:48,953 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:48,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:48,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1349295581, now seen corresponding path program 291 times [2021-05-03 14:38:48,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:48,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999520522] [2021-05-03 14:38:48,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:49,307 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-05-03 14:38:49,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:49,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999520522] [2021-05-03 14:38:49,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705581060] [2021-05-03 14:38:49,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:49,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:38:49,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:49,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:38:49,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:50,434 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 14:38:50,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:50,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:50,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:50,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273922015] [2021-05-03 14:38:50,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:50,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:50,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:50,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:50,593 INFO L87 Difference]: Start difference. First operand 212 states and 468 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:51,238 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-05-03 14:38:51,512 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 14:38:51,806 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 22 [2021-05-03 14:38:51,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:51,867 INFO L93 Difference]: Finished difference Result 237 states and 511 transitions. [2021-05-03 14:38:51,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:38:51,870 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:51,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:51,870 INFO L225 Difference]: With dead ends: 237 [2021-05-03 14:38:51,870 INFO L226 Difference]: Without dead ends: 231 [2021-05-03 14:38:51,870 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 2155.8ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:38:51,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-03 14:38:51,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 212. [2021-05-03 14:38:51,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.213270142180095) internal successors, (467), 211 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:51,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 467 transitions. [2021-05-03 14:38:51,872 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 467 transitions. Word has length 19 [2021-05-03 14:38:51,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:51,873 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 467 transitions. [2021-05-03 14:38:51,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:51,873 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 467 transitions. [2021-05-03 14:38:51,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:51,873 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:51,873 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:52,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2332 [2021-05-03 14:38:52,073 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:52,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:52,074 INFO L82 PathProgramCache]: Analyzing trace with hash -683646110, now seen corresponding path program 292 times [2021-05-03 14:38:52,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:52,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028817952] [2021-05-03 14:38:52,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:52,416 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2021-05-03 14:38:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:52,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028817952] [2021-05-03 14:38:52,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000486050] [2021-05-03 14:38:52,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:52,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:38:52,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:52,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:38:52,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:53,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:53,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:53,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:53,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912453731] [2021-05-03 14:38:53,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:53,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:53,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:53,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:53,406 INFO L87 Difference]: Start difference. First operand 212 states and 467 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:53,623 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-05-03 14:38:54,253 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 14:38:54,572 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-05-03 14:38:54,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:54,914 INFO L93 Difference]: Finished difference Result 255 states and 548 transitions. [2021-05-03 14:38:54,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:38:54,917 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:54,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:54,918 INFO L225 Difference]: With dead ends: 255 [2021-05-03 14:38:54,918 INFO L226 Difference]: Without dead ends: 255 [2021-05-03 14:38:54,918 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1848.0ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:38:54,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-03 14:38:54,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 209. [2021-05-03 14:38:54,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.201923076923077) internal successors, (458), 208 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:54,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 458 transitions. [2021-05-03 14:38:54,920 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 458 transitions. Word has length 19 [2021-05-03 14:38:54,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:54,920 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 458 transitions. [2021-05-03 14:38:54,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:54,920 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 458 transitions. [2021-05-03 14:38:54,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:54,921 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:54,921 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:55,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2340,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:55,121 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:55,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:55,121 INFO L82 PathProgramCache]: Analyzing trace with hash 698799875, now seen corresponding path program 293 times [2021-05-03 14:38:55,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:55,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797166320] [2021-05-03 14:38:55,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:55,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797166320] [2021-05-03 14:38:55,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13746246] [2021-05-03 14:38:55,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:55,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:38:55,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:55,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 14:38:55,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:55,819 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 14:38:56,321 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 14:38:56,467 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 14:38:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:56,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:56,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:56,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120053662] [2021-05-03 14:38:56,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:56,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:56,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:56,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:56,618 INFO L87 Difference]: Start difference. First operand 209 states and 458 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:57,312 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-05-03 14:38:57,706 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-05-03 14:38:57,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:57,797 INFO L93 Difference]: Finished difference Result 255 states and 543 transitions. [2021-05-03 14:38:57,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:38:57,801 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:57,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:57,801 INFO L225 Difference]: With dead ends: 255 [2021-05-03 14:38:57,801 INFO L226 Difference]: Without dead ends: 255 [2021-05-03 14:38:57,801 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1859.6ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:38:57,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-03 14:38:57,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 212. [2021-05-03 14:38:57,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2085308056872037) internal successors, (466), 211 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:57,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 466 transitions. [2021-05-03 14:38:57,803 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 466 transitions. Word has length 19 [2021-05-03 14:38:57,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:57,803 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 466 transitions. [2021-05-03 14:38:57,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:57,803 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 466 transitions. [2021-05-03 14:38:57,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:57,804 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:57,804 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:58,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2345 [2021-05-03 14:38:58,004 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:58,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:58,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1628925470, now seen corresponding path program 294 times [2021-05-03 14:38:58,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:58,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077376629] [2021-05-03 14:38:58,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:58,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077376629] [2021-05-03 14:38:58,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086456886] [2021-05-03 14:38:58,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:58,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:38:58,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:58,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:38:58,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:59,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:59,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:59,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911760397] [2021-05-03 14:38:59,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:59,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:59,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:59,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:59,304 INFO L87 Difference]: Start difference. First operand 212 states and 466 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:59,756 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 14:39:00,076 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 14:39:00,375 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 14:39:00,634 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-05-03 14:39:01,338 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-05-03 14:39:01,540 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 14:39:01,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:01,581 INFO L93 Difference]: Finished difference Result 278 states and 583 transitions. [2021-05-03 14:39:01,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:39:01,584 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:01,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:01,584 INFO L225 Difference]: With dead ends: 278 [2021-05-03 14:39:01,584 INFO L226 Difference]: Without dead ends: 278 [2021-05-03 14:39:01,585 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2511.1ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:39:01,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-05-03 14:39:01,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 214. [2021-05-03 14:39:01,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2253521126760565) internal successors, (474), 213 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:01,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 474 transitions. [2021-05-03 14:39:01,588 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 474 transitions. Word has length 19 [2021-05-03 14:39:01,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:01,588 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 474 transitions. [2021-05-03 14:39:01,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:01,588 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 474 transitions. [2021-05-03 14:39:01,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:01,588 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:01,589 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:01,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2351,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:01,805 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:01,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:01,805 INFO L82 PathProgramCache]: Analyzing trace with hash -133839357, now seen corresponding path program 295 times [2021-05-03 14:39:01,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:01,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383073926] [2021-05-03 14:39:01,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:02,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:02,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383073926] [2021-05-03 14:39:02,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36552625] [2021-05-03 14:39:02,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:02,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:39:02,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:03,037 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-05-03 14:39:03,232 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 14:39:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:03,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:03,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:39:03,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133459459] [2021-05-03 14:39:03,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:39:03,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:03,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:39:03,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:39:03,400 INFO L87 Difference]: Start difference. First operand 214 states and 474 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:03,783 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-05-03 14:39:04,282 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-05-03 14:39:04,546 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 22 [2021-05-03 14:39:04,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:04,632 INFO L93 Difference]: Finished difference Result 241 states and 520 transitions. [2021-05-03 14:39:04,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:39:04,635 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:04,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:04,636 INFO L225 Difference]: With dead ends: 241 [2021-05-03 14:39:04,636 INFO L226 Difference]: Without dead ends: 232 [2021-05-03 14:39:04,636 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2057.7ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:39:04,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-03 14:39:04,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 214. [2021-05-03 14:39:04,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.215962441314554) internal successors, (472), 213 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:04,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 472 transitions. [2021-05-03 14:39:04,638 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 472 transitions. Word has length 19 [2021-05-03 14:39:04,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:04,638 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 472 transitions. [2021-05-03 14:39:04,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:04,638 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 472 transitions. [2021-05-03 14:39:04,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:04,639 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:04,639 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:04,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2360,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:04,839 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:04,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:04,839 INFO L82 PathProgramCache]: Analyzing trace with hash 2128186248, now seen corresponding path program 296 times [2021-05-03 14:39:04,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:04,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480296152] [2021-05-03 14:39:04,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:05,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480296152] [2021-05-03 14:39:05,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147868196] [2021-05-03 14:39:05,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:05,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:39:05,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:05,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-03 14:39:05,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:06,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:06,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:06,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081390999] [2021-05-03 14:39:06,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:06,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:06,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:06,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:06,235 INFO L87 Difference]: Start difference. First operand 214 states and 472 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:06,705 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 14:39:07,046 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 14:39:07,236 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2021-05-03 14:39:07,477 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-05-03 14:39:07,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:07,983 INFO L93 Difference]: Finished difference Result 254 states and 548 transitions. [2021-05-03 14:39:07,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:39:07,986 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:07,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:07,987 INFO L225 Difference]: With dead ends: 254 [2021-05-03 14:39:07,987 INFO L226 Difference]: Without dead ends: 254 [2021-05-03 14:39:07,987 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2246.6ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:39:07,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-03 14:39:07,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 213. [2021-05-03 14:39:07,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2169811320754715) internal successors, (470), 212 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:07,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 470 transitions. [2021-05-03 14:39:07,989 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 470 transitions. Word has length 19 [2021-05-03 14:39:07,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:07,989 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 470 transitions. [2021-05-03 14:39:07,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:07,989 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 470 transitions. [2021-05-03 14:39:07,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:07,989 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:07,990 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:08,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2368 [2021-05-03 14:39:08,190 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:08,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:08,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1660434782, now seen corresponding path program 297 times [2021-05-03 14:39:08,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:08,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900121278] [2021-05-03 14:39:08,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:08,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:08,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900121278] [2021-05-03 14:39:08,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294864548] [2021-05-03 14:39:08,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:08,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:39:08,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:08,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:39:08,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:09,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:09,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:39:09,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361903662] [2021-05-03 14:39:09,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:39:09,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:09,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:39:09,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:39:09,511 INFO L87 Difference]: Start difference. First operand 213 states and 470 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:10,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:10,148 INFO L93 Difference]: Finished difference Result 240 states and 518 transitions. [2021-05-03 14:39:10,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:39:10,151 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:10,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:10,151 INFO L225 Difference]: With dead ends: 240 [2021-05-03 14:39:10,151 INFO L226 Difference]: Without dead ends: 240 [2021-05-03 14:39:10,151 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1092.4ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:39:10,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-03 14:39:10,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 210. [2021-05-03 14:39:10,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.200956937799043) internal successors, (460), 209 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 460 transitions. [2021-05-03 14:39:10,153 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 460 transitions. Word has length 19 [2021-05-03 14:39:10,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:10,153 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 460 transitions. [2021-05-03 14:39:10,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:10,154 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 460 transitions. [2021-05-03 14:39:10,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:10,154 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:10,154 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:10,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2373,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:10,354 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:10,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:10,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1443064199, now seen corresponding path program 298 times [2021-05-03 14:39:10,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:10,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521874502] [2021-05-03 14:39:10,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:10,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521874502] [2021-05-03 14:39:10,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369486983] [2021-05-03 14:39:10,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:10,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:39:10,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:10,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:39:10,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:11,117 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 14:39:11,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:11,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:11,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:11,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721813318] [2021-05-03 14:39:11,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:11,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:11,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:11,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:11,765 INFO L87 Difference]: Start difference. First operand 210 states and 460 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:12,245 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-05-03 14:39:13,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:13,021 INFO L93 Difference]: Finished difference Result 229 states and 498 transitions. [2021-05-03 14:39:13,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:39:13,024 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:13,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:13,025 INFO L225 Difference]: With dead ends: 229 [2021-05-03 14:39:13,025 INFO L226 Difference]: Without dead ends: 229 [2021-05-03 14:39:13,025 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1851.6ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:39:13,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-03 14:39:13,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 210. [2021-05-03 14:39:13,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.200956937799043) internal successors, (460), 209 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:13,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 460 transitions. [2021-05-03 14:39:13,027 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 460 transitions. Word has length 19 [2021-05-03 14:39:13,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:13,027 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 460 transitions. [2021-05-03 14:39:13,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:13,027 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 460 transitions. [2021-05-03 14:39:13,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:13,027 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:13,027 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:13,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2378,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:13,228 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:13,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1693024113, now seen corresponding path program 299 times [2021-05-03 14:39:13,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:13,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986979566] [2021-05-03 14:39:13,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:13,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986979566] [2021-05-03 14:39:13,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820442289] [2021-05-03 14:39:13,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:13,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:39:13,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:13,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:39:13,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:14,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:14,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:14,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156139019] [2021-05-03 14:39:14,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:14,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:14,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:14,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:14,481 INFO L87 Difference]: Start difference. First operand 210 states and 460 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:15,045 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-05-03 14:39:15,323 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-05-03 14:39:15,562 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 14:39:15,830 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 14:39:16,174 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 14:39:16,346 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-05-03 14:39:16,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:16,736 INFO L93 Difference]: Finished difference Result 242 states and 524 transitions. [2021-05-03 14:39:16,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:39:16,739 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:16,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:16,739 INFO L225 Difference]: With dead ends: 242 [2021-05-03 14:39:16,739 INFO L226 Difference]: Without dead ends: 242 [2021-05-03 14:39:16,739 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2577.3ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:39:16,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-03 14:39:16,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 210. [2021-05-03 14:39:16,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.200956937799043) internal successors, (460), 209 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:16,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 460 transitions. [2021-05-03 14:39:16,741 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 460 transitions. Word has length 19 [2021-05-03 14:39:16,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:16,742 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 460 transitions. [2021-05-03 14:39:16,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:16,742 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 460 transitions. [2021-05-03 14:39:16,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:16,742 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:16,742 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:16,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2382 [2021-05-03 14:39:16,942 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:16,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:16,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1530947719, now seen corresponding path program 300 times [2021-05-03 14:39:16,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:16,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850611209] [2021-05-03 14:39:16,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:17,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850611209] [2021-05-03 14:39:17,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307255886] [2021-05-03 14:39:17,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:17,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:39:17,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:17,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 14:39:17,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:18,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:18,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:39:18,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543542282] [2021-05-03 14:39:18,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:39:18,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:18,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:39:18,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:39:18,322 INFO L87 Difference]: Start difference. First operand 210 states and 460 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:18,711 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-05-03 14:39:19,093 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-05-03 14:39:19,426 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-05-03 14:39:19,836 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-05-03 14:39:20,064 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-05-03 14:39:20,373 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 14:39:20,563 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-05-03 14:39:20,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:20,842 INFO L93 Difference]: Finished difference Result 245 states and 530 transitions. [2021-05-03 14:39:20,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:39:20,845 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:20,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:20,845 INFO L225 Difference]: With dead ends: 245 [2021-05-03 14:39:20,845 INFO L226 Difference]: Without dead ends: 245 [2021-05-03 14:39:20,845 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 2896.8ms TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:39:20,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-03 14:39:20,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 211. [2021-05-03 14:39:20,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2) internal successors, (462), 210 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:20,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 462 transitions. [2021-05-03 14:39:20,847 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 462 transitions. Word has length 19 [2021-05-03 14:39:20,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:20,847 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 462 transitions. [2021-05-03 14:39:20,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:20,848 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 462 transitions. [2021-05-03 14:39:20,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:20,848 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:20,848 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:21,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2387,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:21,048 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:21,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:21,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1967283825, now seen corresponding path program 301 times [2021-05-03 14:39:21,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:21,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951180033] [2021-05-03 14:39:21,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:21,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:21,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951180033] [2021-05-03 14:39:21,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433239150] [2021-05-03 14:39:21,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:21,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:39:21,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:22,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:22,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:22,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297688437] [2021-05-03 14:39:22,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:22,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:22,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:22,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:22,300 INFO L87 Difference]: Start difference. First operand 211 states and 462 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:22,604 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-05-03 14:39:22,808 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-05-03 14:39:23,220 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-05-03 14:39:23,564 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-05-03 14:39:24,017 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-05-03 14:39:24,327 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-05-03 14:39:24,861 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 14:39:25,328 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-05-03 14:39:25,590 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 22 [2021-05-03 14:39:25,804 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 23 [2021-05-03 14:39:25,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:25,861 INFO L93 Difference]: Finished difference Result 281 states and 588 transitions. [2021-05-03 14:39:25,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:39:25,864 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:25,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:25,864 INFO L225 Difference]: With dead ends: 281 [2021-05-03 14:39:25,864 INFO L226 Difference]: Without dead ends: 281 [2021-05-03 14:39:25,864 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 3769.5ms TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:39:25,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-05-03 14:39:25,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 212. [2021-05-03 14:39:25,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2085308056872037) internal successors, (466), 211 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:25,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 466 transitions. [2021-05-03 14:39:25,867 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 466 transitions. Word has length 19 [2021-05-03 14:39:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:25,867 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 466 transitions. [2021-05-03 14:39:25,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:25,867 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 466 transitions. [2021-05-03 14:39:25,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:25,867 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:25,867 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:26,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2392,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:26,068 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:26,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:26,068 INFO L82 PathProgramCache]: Analyzing trace with hash -839887732, now seen corresponding path program 302 times [2021-05-03 14:39:26,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:26,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955610653] [2021-05-03 14:39:26,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:26,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955610653] [2021-05-03 14:39:26,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249027026] [2021-05-03 14:39:26,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:26,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:39:26,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:26,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 14:39:26,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:26,937 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 14:39:27,297 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 14:39:27,566 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 14:39:27,836 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 14:39:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:28,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:28,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:39:28,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337202712] [2021-05-03 14:39:28,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:39:28,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:28,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:39:28,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:39:28,090 INFO L87 Difference]: Start difference. First operand 212 states and 466 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:28,538 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-05-03 14:39:28,893 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-05-03 14:39:29,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:29,588 INFO L93 Difference]: Finished difference Result 238 states and 513 transitions. [2021-05-03 14:39:29,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:39:29,591 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:29,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:29,591 INFO L225 Difference]: With dead ends: 238 [2021-05-03 14:39:29,591 INFO L226 Difference]: Without dead ends: 236 [2021-05-03 14:39:29,591 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2479.8ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:39:29,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-03 14:39:29,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 212. [2021-05-03 14:39:29,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.203791469194313) internal successors, (465), 211 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:29,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 465 transitions. [2021-05-03 14:39:29,594 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 465 transitions. Word has length 19 [2021-05-03 14:39:29,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:29,594 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 465 transitions. [2021-05-03 14:39:29,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:29,594 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 465 transitions. [2021-05-03 14:39:29,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:29,594 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:29,594 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:29,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2401,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:29,795 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:29,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:29,795 INFO L82 PathProgramCache]: Analyzing trace with hash -425566935, now seen corresponding path program 303 times [2021-05-03 14:39:29,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:29,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117891502] [2021-05-03 14:39:29,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:30,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117891502] [2021-05-03 14:39:30,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838686369] [2021-05-03 14:39:30,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:30,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:39:30,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:30,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:39:30,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:31,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:31,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:31,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330809232] [2021-05-03 14:39:31,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:31,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:31,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:31,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:31,137 INFO L87 Difference]: Start difference. First operand 212 states and 465 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:31,667 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-05-03 14:39:32,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:32,203 INFO L93 Difference]: Finished difference Result 234 states and 509 transitions. [2021-05-03 14:39:32,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:39:32,206 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:32,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:32,207 INFO L225 Difference]: With dead ends: 234 [2021-05-03 14:39:32,207 INFO L226 Difference]: Without dead ends: 234 [2021-05-03 14:39:32,207 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1484.7ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:39:32,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-03 14:39:32,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 212. [2021-05-03 14:39:32,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.203791469194313) internal successors, (465), 211 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:32,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 465 transitions. [2021-05-03 14:39:32,209 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 465 transitions. Word has length 19 [2021-05-03 14:39:32,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:32,209 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 465 transitions. [2021-05-03 14:39:32,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:32,209 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 465 transitions. [2021-05-03 14:39:32,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:32,209 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:32,209 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:32,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2409,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:32,410 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:32,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:32,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1496562399, now seen corresponding path program 304 times [2021-05-03 14:39:32,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:32,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036559324] [2021-05-03 14:39:32,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:32,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:32,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:32,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036559324] [2021-05-03 14:39:32,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462558942] [2021-05-03 14:39:32,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:32,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:39:32,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:32,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:39:32,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:33,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:33,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:33,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:33,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488856393] [2021-05-03 14:39:33,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:33,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:33,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:33,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:33,601 INFO L87 Difference]: Start difference. First operand 212 states and 465 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:33,887 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-05-03 14:39:34,168 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-05-03 14:39:34,373 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-05-03 14:39:34,592 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-05-03 14:39:34,961 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-05-03 14:39:35,367 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2021-05-03 14:39:35,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:35,618 INFO L93 Difference]: Finished difference Result 246 states and 533 transitions. [2021-05-03 14:39:35,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:39:35,622 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:35,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:35,622 INFO L225 Difference]: With dead ends: 246 [2021-05-03 14:39:35,622 INFO L226 Difference]: Without dead ends: 246 [2021-05-03 14:39:35,622 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 2434.9ms TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:39:35,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-03 14:39:35,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 212. [2021-05-03 14:39:35,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.203791469194313) internal successors, (465), 211 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:35,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 465 transitions. [2021-05-03 14:39:35,625 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 465 transitions. Word has length 19 [2021-05-03 14:39:35,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:35,625 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 465 transitions. [2021-05-03 14:39:35,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:35,625 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 465 transitions. [2021-05-03 14:39:35,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:35,625 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:35,626 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:35,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2414 [2021-05-03 14:39:35,837 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:35,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:35,837 INFO L82 PathProgramCache]: Analyzing trace with hash -699826647, now seen corresponding path program 305 times [2021-05-03 14:39:35,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:35,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689575082] [2021-05-03 14:39:35,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:35,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:36,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689575082] [2021-05-03 14:39:36,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632382343] [2021-05-03 14:39:36,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:36,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:39:36,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:36,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:39:36,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:37,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:37,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:37,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:37,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838422026] [2021-05-03 14:39:37,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:37,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:37,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:37,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:37,313 INFO L87 Difference]: Start difference. First operand 212 states and 465 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:37,806 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-05-03 14:39:38,063 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 14:39:38,374 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-05-03 14:39:38,748 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-05-03 14:39:39,234 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 14:39:39,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:39,361 INFO L93 Difference]: Finished difference Result 252 states and 545 transitions. [2021-05-03 14:39:39,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:39:39,364 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:39,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:39,364 INFO L225 Difference]: With dead ends: 252 [2021-05-03 14:39:39,364 INFO L226 Difference]: Without dead ends: 252 [2021-05-03 14:39:39,364 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 2628.4ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:39:39,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-03 14:39:39,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 212. [2021-05-03 14:39:39,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.203791469194313) internal successors, (465), 211 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:39,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 465 transitions. [2021-05-03 14:39:39,366 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 465 transitions. Word has length 19 [2021-05-03 14:39:39,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:39,367 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 465 transitions. [2021-05-03 14:39:39,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:39,367 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 465 transitions. [2021-05-03 14:39:39,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:39,367 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:39,367 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:39,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2419,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:39,567 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:39,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:39,568 INFO L82 PathProgramCache]: Analyzing trace with hash -412276412, now seen corresponding path program 306 times [2021-05-03 14:39:39,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:39,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414525088] [2021-05-03 14:39:39,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:40,004 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:40,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414525088] [2021-05-03 14:39:40,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321095040] [2021-05-03 14:39:40,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:40,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:39:40,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:40,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-03 14:39:40,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:40,765 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 14:39:41,008 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 14:39:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:41,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:41,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:39:41,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970963962] [2021-05-03 14:39:41,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:39:41,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:41,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:39:41,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:39:41,247 INFO L87 Difference]: Start difference. First operand 212 states and 465 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:41,625 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-05-03 14:39:41,917 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-05-03 14:39:42,217 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 14:39:42,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:42,716 INFO L93 Difference]: Finished difference Result 235 states and 511 transitions. [2021-05-03 14:39:42,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:39:42,719 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:42,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:42,719 INFO L225 Difference]: With dead ends: 235 [2021-05-03 14:39:42,719 INFO L226 Difference]: Without dead ends: 235 [2021-05-03 14:39:42,719 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2104.0ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:39:42,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-03 14:39:42,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2021-05-03 14:39:42,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.1980676328502415) internal successors, (455), 207 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:42,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 455 transitions. [2021-05-03 14:39:42,721 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 455 transitions. Word has length 19 [2021-05-03 14:39:42,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:42,721 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 455 transitions. [2021-05-03 14:39:42,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:42,721 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 455 transitions. [2021-05-03 14:39:42,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:42,722 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:42,722 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:42,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2428 [2021-05-03 14:39:42,922 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:42,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:42,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1315269959, now seen corresponding path program 307 times [2021-05-03 14:39:42,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:42,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894593273] [2021-05-03 14:39:42,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:43,295 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:39:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:43,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894593273] [2021-05-03 14:39:43,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281093005] [2021-05-03 14:39:43,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:43,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:39:43,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:44,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:44,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:44,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966591709] [2021-05-03 14:39:44,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:44,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:44,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:44,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:44,110 INFO L87 Difference]: Start difference. First operand 208 states and 455 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:44,515 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-05-03 14:39:44,721 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 14:39:44,942 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 14 [2021-05-03 14:39:45,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:45,330 INFO L93 Difference]: Finished difference Result 235 states and 509 transitions. [2021-05-03 14:39:45,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:39:45,334 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:45,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:45,334 INFO L225 Difference]: With dead ends: 235 [2021-05-03 14:39:45,334 INFO L226 Difference]: Without dead ends: 235 [2021-05-03 14:39:45,334 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1559.5ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:39:45,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-03 14:39:45,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 210. [2021-05-03 14:39:45,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.1961722488038276) internal successors, (459), 209 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:45,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 459 transitions. [2021-05-03 14:39:45,336 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 459 transitions. Word has length 19 [2021-05-03 14:39:45,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:45,337 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 459 transitions. [2021-05-03 14:39:45,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:45,337 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 459 transitions. [2021-05-03 14:39:45,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:45,337 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:45,337 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:45,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2437,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:45,537 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:45,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:45,538 INFO L82 PathProgramCache]: Analyzing trace with hash 2112005711, now seen corresponding path program 308 times [2021-05-03 14:39:45,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:45,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376551263] [2021-05-03 14:39:45,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:45,942 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:39:46,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:46,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376551263] [2021-05-03 14:39:46,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181649053] [2021-05-03 14:39:46,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:46,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:39:46,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:46,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-03 14:39:46,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:47,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:47,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:47,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:39:47,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787525299] [2021-05-03 14:39:47,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:39:47,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:47,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:39:47,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:39:47,075 INFO L87 Difference]: Start difference. First operand 210 states and 459 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:47,385 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-05-03 14:39:47,605 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-05-03 14:39:47,848 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-05-03 14:39:48,053 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 14:39:48,448 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-05-03 14:39:49,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:49,038 INFO L93 Difference]: Finished difference Result 247 states and 530 transitions. [2021-05-03 14:39:49,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:39:49,041 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:49,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:49,042 INFO L225 Difference]: With dead ends: 247 [2021-05-03 14:39:49,042 INFO L226 Difference]: Without dead ends: 244 [2021-05-03 14:39:49,042 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 2454.9ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:39:49,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-05-03 14:39:49,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 211. [2021-05-03 14:39:49,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2) internal successors, (462), 210 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:49,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 462 transitions. [2021-05-03 14:39:49,044 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 462 transitions. Word has length 19 [2021-05-03 14:39:49,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:49,044 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 462 transitions. [2021-05-03 14:39:49,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:49,044 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 462 transitions. [2021-05-03 14:39:49,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:49,045 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:49,045 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:49,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2442 [2021-05-03 14:39:49,245 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:49,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:49,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1055565492, now seen corresponding path program 309 times [2021-05-03 14:39:49,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:49,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685600269] [2021-05-03 14:39:49,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:49,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:49,610 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-05-03 14:39:49,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:49,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685600269] [2021-05-03 14:39:49,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030012673] [2021-05-03 14:39:49,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:49,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:39:49,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:49,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:39:49,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:50,798 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 14:39:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:50,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:50,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:50,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978189154] [2021-05-03 14:39:50,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:50,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:50,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:50,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:50,971 INFO L87 Difference]: Start difference. First operand 211 states and 462 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:51,341 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-05-03 14:39:51,664 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 14:39:52,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:52,170 INFO L93 Difference]: Finished difference Result 233 states and 503 transitions. [2021-05-03 14:39:52,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:39:52,172 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:52,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:52,173 INFO L225 Difference]: With dead ends: 233 [2021-05-03 14:39:52,173 INFO L226 Difference]: Without dead ends: 231 [2021-05-03 14:39:52,173 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2074.7ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:39:52,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-03 14:39:52,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 209. [2021-05-03 14:39:52,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.1971153846153846) internal successors, (457), 208 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:52,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 457 transitions. [2021-05-03 14:39:52,175 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 457 transitions. Word has length 19 [2021-05-03 14:39:52,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:52,175 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 457 transitions. [2021-05-03 14:39:52,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:52,175 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 457 transitions. [2021-05-03 14:39:52,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:52,175 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:52,175 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:52,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2451,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:52,376 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:52,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:52,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1676615319, now seen corresponding path program 310 times [2021-05-03 14:39:52,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:52,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393864095] [2021-05-03 14:39:52,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:52,754 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:39:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:52,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393864095] [2021-05-03 14:39:52,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839516824] [2021-05-03 14:39:52,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:52,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:39:52,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:52,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:39:52,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:54,018 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 14:39:54,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:54,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:54,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:54,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535966115] [2021-05-03 14:39:54,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:54,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:54,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:54,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:54,199 INFO L87 Difference]: Start difference. First operand 209 states and 457 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:54,478 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-05-03 14:39:54,628 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 14 [2021-05-03 14:39:55,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:55,112 INFO L93 Difference]: Finished difference Result 230 states and 499 transitions. [2021-05-03 14:39:55,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:39:55,113 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:55,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:55,114 INFO L225 Difference]: With dead ends: 230 [2021-05-03 14:39:55,114 INFO L226 Difference]: Without dead ends: 230 [2021-05-03 14:39:55,114 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2085.0ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:39:55,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-05-03 14:39:55,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 209. [2021-05-03 14:39:55,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.1971153846153846) internal successors, (457), 208 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:55,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 457 transitions. [2021-05-03 14:39:55,117 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 457 transitions. Word has length 19 [2021-05-03 14:39:55,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:55,117 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 457 transitions. [2021-05-03 14:39:55,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:55,117 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 457 transitions. [2021-05-03 14:39:55,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:55,117 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:55,117 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:55,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2459,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:55,318 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:55,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:55,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1389065084, now seen corresponding path program 311 times [2021-05-03 14:39:55,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:55,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5919948] [2021-05-03 14:39:55,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:55,693 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-05-03 14:39:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:55,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5919948] [2021-05-03 14:39:55,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203338326] [2021-05-03 14:39:55,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:55,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:39:55,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:55,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-03 14:39:55,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:56,300 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 14:39:56,652 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 14:39:56,905 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 14:39:57,185 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 14:39:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:57,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:57,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:57,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759670497] [2021-05-03 14:39:57,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:57,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:57,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:57,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:57,377 INFO L87 Difference]: Start difference. First operand 209 states and 457 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:57,890 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-05-03 14:39:58,233 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-05-03 14:39:59,001 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-03 14:39:59,401 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-05-03 14:39:59,913 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-05-03 14:40:00,160 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 14:40:00,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:00,201 INFO L93 Difference]: Finished difference Result 294 states and 611 transitions. [2021-05-03 14:40:00,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:40:00,204 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:00,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:00,205 INFO L225 Difference]: With dead ends: 294 [2021-05-03 14:40:00,205 INFO L226 Difference]: Without dead ends: 294 [2021-05-03 14:40:00,205 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 3787.2ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:40:00,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-03 14:40:00,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 212. [2021-05-03 14:40:00,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2085308056872037) internal successors, (466), 211 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:00,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 466 transitions. [2021-05-03 14:40:00,207 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 466 transitions. Word has length 19 [2021-05-03 14:40:00,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:00,207 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 466 transitions. [2021-05-03 14:40:00,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:00,207 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 466 transitions. [2021-05-03 14:40:00,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:00,208 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:00,208 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:00,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2467 [2021-05-03 14:40:00,408 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:00,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:00,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1087074804, now seen corresponding path program 312 times [2021-05-03 14:40:00,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:00,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77928479] [2021-05-03 14:40:00,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:00,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:00,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77928479] [2021-05-03 14:40:00,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797487299] [2021-05-03 14:40:00,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:00,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:40:00,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:00,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:40:00,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:01,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:01,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:01,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:40:01,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606825033] [2021-05-03 14:40:01,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:40:01,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:01,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:40:01,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:40:01,601 INFO L87 Difference]: Start difference. First operand 212 states and 466 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:01,922 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2021-05-03 14:40:02,111 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-05-03 14:40:02,262 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2021-05-03 14:40:02,484 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-05-03 14:40:02,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:02,981 INFO L93 Difference]: Finished difference Result 244 states and 526 transitions. [2021-05-03 14:40:02,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:40:02,985 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:02,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:02,985 INFO L225 Difference]: With dead ends: 244 [2021-05-03 14:40:02,986 INFO L226 Difference]: Without dead ends: 244 [2021-05-03 14:40:02,986 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1637.1ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:40:02,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-05-03 14:40:02,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 208. [2021-05-03 14:40:02,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.1980676328502415) internal successors, (455), 207 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:02,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 455 transitions. [2021-05-03 14:40:02,988 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 455 transitions. Word has length 19 [2021-05-03 14:40:02,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:02,988 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 455 transitions. [2021-05-03 14:40:02,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:02,988 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 455 transitions. [2021-05-03 14:40:02,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:02,988 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:02,988 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:03,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2474 [2021-05-03 14:40:03,189 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:03,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:03,189 INFO L82 PathProgramCache]: Analyzing trace with hash 210899919, now seen corresponding path program 313 times [2021-05-03 14:40:03,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:03,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368433645] [2021-05-03 14:40:03,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:03,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:03,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368433645] [2021-05-03 14:40:03,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252464831] [2021-05-03 14:40:03,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:03,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:40:03,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:04,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:04,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:04,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:40:04,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976408880] [2021-05-03 14:40:04,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:40:04,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:04,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:40:04,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:40:04,702 INFO L87 Difference]: Start difference. First operand 208 states and 455 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:05,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:05,508 INFO L93 Difference]: Finished difference Result 231 states and 501 transitions. [2021-05-03 14:40:05,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:40:05,512 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:05,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:05,513 INFO L225 Difference]: With dead ends: 231 [2021-05-03 14:40:05,513 INFO L226 Difference]: Without dead ends: 231 [2021-05-03 14:40:05,513 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1251.5ms TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:40:05,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-03 14:40:05,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 209. [2021-05-03 14:40:05,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.1971153846153846) internal successors, (457), 208 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:05,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 457 transitions. [2021-05-03 14:40:05,516 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 457 transitions. Word has length 19 [2021-05-03 14:40:05,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:05,517 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 457 transitions. [2021-05-03 14:40:05,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:05,517 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 457 transitions. [2021-05-03 14:40:05,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:05,517 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:05,517 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:05,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2479 [2021-05-03 14:40:05,742 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:05,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:05,742 INFO L82 PathProgramCache]: Analyzing trace with hash -860095545, now seen corresponding path program 314 times [2021-05-03 14:40:05,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:05,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413254841] [2021-05-03 14:40:05,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:06,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:06,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413254841] [2021-05-03 14:40:06,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711743747] [2021-05-03 14:40:06,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:06,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:40:06,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:06,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:40:06,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:06,953 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 14:40:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:07,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:07,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:40:07,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337641398] [2021-05-03 14:40:07,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:40:07,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:07,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:40:07,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:40:07,310 INFO L87 Difference]: Start difference. First operand 209 states and 457 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:07,739 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-05-03 14:40:08,482 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 14:40:09,086 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 14:40:09,498 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2021-05-03 14:40:09,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:09,807 INFO L93 Difference]: Finished difference Result 246 states and 531 transitions. [2021-05-03 14:40:09,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:40:09,810 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:09,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:09,810 INFO L225 Difference]: With dead ends: 246 [2021-05-03 14:40:09,810 INFO L226 Difference]: Without dead ends: 246 [2021-05-03 14:40:09,811 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 2688.3ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:40:09,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-03 14:40:09,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 210. [2021-05-03 14:40:09,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.1961722488038276) internal successors, (459), 209 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:09,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 459 transitions. [2021-05-03 14:40:09,813 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 459 transitions. Word has length 19 [2021-05-03 14:40:09,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:09,813 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 459 transitions. [2021-05-03 14:40:09,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:09,813 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 459 transitions. [2021-05-03 14:40:09,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:09,813 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:09,813 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:10,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2484,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:10,014 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:10,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:10,014 INFO L82 PathProgramCache]: Analyzing trace with hash -63359793, now seen corresponding path program 315 times [2021-05-03 14:40:10,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:10,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947707797] [2021-05-03 14:40:10,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:10,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:10,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947707797] [2021-05-03 14:40:10,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579856293] [2021-05-03 14:40:10,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:10,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:40:10,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:10,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:40:10,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:10,910 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 14:40:11,244 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 14:40:11,549 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 14:40:11,768 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 14:40:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:12,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:12,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:40:12,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064617542] [2021-05-03 14:40:12,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:40:12,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:12,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:40:12,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:40:12,032 INFO L87 Difference]: Start difference. First operand 210 states and 459 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:12,372 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-05-03 14:40:12,632 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-05-03 14:40:13,101 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-05-03 14:40:13,306 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-05-03 14:40:13,820 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-05-03 14:40:14,426 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-05-03 14:40:14,733 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 14:40:15,013 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-05-03 14:40:15,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:15,336 INFO L93 Difference]: Finished difference Result 252 states and 543 transitions. [2021-05-03 14:40:15,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:40:15,339 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:15,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:15,340 INFO L225 Difference]: With dead ends: 252 [2021-05-03 14:40:15,340 INFO L226 Difference]: Without dead ends: 252 [2021-05-03 14:40:15,340 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 4042.2ms TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:40:15,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-03 14:40:15,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 211. [2021-05-03 14:40:15,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.1952380952380954) internal successors, (461), 210 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:15,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 461 transitions. [2021-05-03 14:40:15,342 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 461 transitions. Word has length 19 [2021-05-03 14:40:15,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:15,342 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 461 transitions. [2021-05-03 14:40:15,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:15,342 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 461 transitions. [2021-05-03 14:40:15,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:15,343 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:15,343 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:15,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2489,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:15,543 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:15,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:15,544 INFO L82 PathProgramCache]: Analyzing trace with hash 224190442, now seen corresponding path program 316 times [2021-05-03 14:40:15,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:15,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593540300] [2021-05-03 14:40:15,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:15,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:16,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:16,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593540300] [2021-05-03 14:40:16,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105472072] [2021-05-03 14:40:16,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:16,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:40:16,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:16,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:40:16,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:16,935 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-05-03 14:40:17,156 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 14:40:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:17,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:17,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:40:17,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748935793] [2021-05-03 14:40:17,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:40:17,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:17,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:40:17,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:40:17,346 INFO L87 Difference]: Start difference. First operand 211 states and 461 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:17,693 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-05-03 14:40:17,998 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-05-03 14:40:18,332 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 14:40:18,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:18,651 INFO L93 Difference]: Finished difference Result 233 states and 505 transitions. [2021-05-03 14:40:18,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:40:18,654 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:18,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:18,655 INFO L225 Difference]: With dead ends: 233 [2021-05-03 14:40:18,655 INFO L226 Difference]: Without dead ends: 233 [2021-05-03 14:40:18,655 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 2247.0ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:40:18,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-03 14:40:18,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 208. [2021-05-03 14:40:18,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.1980676328502415) internal successors, (455), 207 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:18,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 455 transitions. [2021-05-03 14:40:18,657 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 455 transitions. Word has length 19 [2021-05-03 14:40:18,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:18,657 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 455 transitions. [2021-05-03 14:40:18,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:18,658 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 455 transitions. [2021-05-03 14:40:18,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:18,658 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:18,658 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:18,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2496 [2021-05-03 14:40:18,858 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:18,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:18,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1951736813, now seen corresponding path program 317 times [2021-05-03 14:40:18,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:18,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177957874] [2021-05-03 14:40:18,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:19,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177957874] [2021-05-03 14:40:19,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278375238] [2021-05-03 14:40:19,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:19,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:40:19,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:19,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:40:19,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:20,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:20,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:20,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:40:20,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079002894] [2021-05-03 14:40:20,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:40:20,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:20,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:40:20,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:40:20,186 INFO L87 Difference]: Start difference. First operand 208 states and 455 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:20,533 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-05-03 14:40:20,982 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 14:40:21,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:21,494 INFO L93 Difference]: Finished difference Result 233 states and 505 transitions. [2021-05-03 14:40:21,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:40:21,498 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:21,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:21,498 INFO L225 Difference]: With dead ends: 233 [2021-05-03 14:40:21,498 INFO L226 Difference]: Without dead ends: 233 [2021-05-03 14:40:21,498 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1542.4ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:40:21,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-03 14:40:21,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 208. [2021-05-03 14:40:21,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.1980676328502415) internal successors, (455), 207 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:21,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 455 transitions. [2021-05-03 14:40:21,500 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 455 transitions. Word has length 19 [2021-05-03 14:40:21,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:21,500 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 455 transitions. [2021-05-03 14:40:21,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:21,500 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 455 transitions. [2021-05-03 14:40:21,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:21,501 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:21,501 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:21,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2504,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:21,701 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:21,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:21,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1546494731, now seen corresponding path program 318 times [2021-05-03 14:40:21,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:21,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736236805] [2021-05-03 14:40:21,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:22,159 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-05-03 14:40:22,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:22,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736236805] [2021-05-03 14:40:22,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402723394] [2021-05-03 14:40:22,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:22,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:40:22,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:22,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:40:22,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:22,811 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 14:40:23,064 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 14:40:23,350 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 14:40:23,626 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 14:40:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:23,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:23,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:40:23,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883716111] [2021-05-03 14:40:23,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:40:23,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:23,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:40:23,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:40:23,889 INFO L87 Difference]: Start difference. First operand 208 states and 455 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:24,240 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-05-03 14:40:24,785 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-05-03 14:40:25,137 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-05-03 14:40:25,889 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 14:40:26,276 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-05-03 14:40:26,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:26,488 INFO L93 Difference]: Finished difference Result 250 states and 534 transitions. [2021-05-03 14:40:26,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:40:26,489 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:26,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:26,490 INFO L225 Difference]: With dead ends: 250 [2021-05-03 14:40:26,490 INFO L226 Difference]: Without dead ends: 247 [2021-05-03 14:40:26,490 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 3783.1ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:40:26,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-03 14:40:26,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 208. [2021-05-03 14:40:26,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.1932367149758454) internal successors, (454), 207 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:26,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 454 transitions. [2021-05-03 14:40:26,492 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 454 transitions. Word has length 19 [2021-05-03 14:40:26,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:26,492 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 454 transitions. [2021-05-03 14:40:26,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:26,492 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 454 transitions. [2021-05-03 14:40:26,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:26,492 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:26,492 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:26,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2509 [2021-05-03 14:40:26,693 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:26,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:26,693 INFO L82 PathProgramCache]: Analyzing trace with hash -419098638, now seen corresponding path program 319 times [2021-05-03 14:40:26,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:26,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673601154] [2021-05-03 14:40:26,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:27,140 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-05-03 14:40:27,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:27,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673601154] [2021-05-03 14:40:27,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044742490] [2021-05-03 14:40:27,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:27,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:40:27,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:28,307 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 14:40:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:28,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:28,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:40:28,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037742550] [2021-05-03 14:40:28,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:40:28,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:28,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:40:28,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:40:28,487 INFO L87 Difference]: Start difference. First operand 208 states and 454 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:28,800 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-05-03 14:40:29,108 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-05-03 14:40:29,390 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 14:40:29,789 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-05-03 14:40:30,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:30,125 INFO L93 Difference]: Finished difference Result 230 states and 495 transitions. [2021-05-03 14:40:30,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:40:30,128 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:30,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:30,128 INFO L225 Difference]: With dead ends: 230 [2021-05-03 14:40:30,128 INFO L226 Difference]: Without dead ends: 228 [2021-05-03 14:40:30,128 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 2552.4ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:40:30,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-03 14:40:30,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 206. [2021-05-03 14:40:30,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.1902439024390246) internal successors, (449), 205 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:30,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 449 transitions. [2021-05-03 14:40:30,130 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 449 transitions. Word has length 19 [2021-05-03 14:40:30,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:30,130 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 449 transitions. [2021-05-03 14:40:30,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:30,130 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 449 transitions. [2021-05-03 14:40:30,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:30,131 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:30,131 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:30,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2516,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:30,331 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:30,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:30,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1040148465, now seen corresponding path program 320 times [2021-05-03 14:40:30,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:30,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837200042] [2021-05-03 14:40:30,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:30,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837200042] [2021-05-03 14:40:30,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520881968] [2021-05-03 14:40:30,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:30,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:40:30,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:30,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 14:40:30,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:30,949 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 14:40:31,283 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 14:40:31,814 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 14:40:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:32,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:32,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:40:32,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940949112] [2021-05-03 14:40:32,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:40:32,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:32,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:40:32,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:40:32,061 INFO L87 Difference]: Start difference. First operand 206 states and 449 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:33,257 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 27 [2021-05-03 14:40:33,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:33,625 INFO L93 Difference]: Finished difference Result 234 states and 501 transitions. [2021-05-03 14:40:33,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:40:33,628 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:33,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:33,628 INFO L225 Difference]: With dead ends: 234 [2021-05-03 14:40:33,628 INFO L226 Difference]: Without dead ends: 228 [2021-05-03 14:40:33,628 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1988.6ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:40:33,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-03 14:40:33,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 206. [2021-05-03 14:40:33,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.1902439024390246) internal successors, (449), 205 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:33,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 449 transitions. [2021-05-03 14:40:33,630 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 449 transitions. Word has length 19 [2021-05-03 14:40:33,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:33,630 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 449 transitions. [2021-05-03 14:40:33,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:33,631 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 449 transitions. [2021-05-03 14:40:33,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:33,631 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:33,631 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:33,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2524,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:33,831 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:33,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:33,832 INFO L82 PathProgramCache]: Analyzing trace with hash -752598230, now seen corresponding path program 321 times [2021-05-03 14:40:33,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:33,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697084677] [2021-05-03 14:40:33,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:34,330 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:40:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:34,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697084677] [2021-05-03 14:40:34,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721572523] [2021-05-03 14:40:34,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:34,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:40:34,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:34,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-03 14:40:34,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:35,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:35,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:40:35,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333762322] [2021-05-03 14:40:35,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:40:35,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:35,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:40:35,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:40:35,594 INFO L87 Difference]: Start difference. First operand 206 states and 449 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:36,772 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-05-03 14:40:37,012 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-05-03 14:40:37,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:37,195 INFO L93 Difference]: Finished difference Result 295 states and 611 transitions. [2021-05-03 14:40:37,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:40:37,200 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:37,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:37,200 INFO L225 Difference]: With dead ends: 295 [2021-05-03 14:40:37,200 INFO L226 Difference]: Without dead ends: 295 [2021-05-03 14:40:37,200 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2279.9ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:40:37,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-05-03 14:40:37,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 209. [2021-05-03 14:40:37,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.201923076923077) internal successors, (458), 208 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:37,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 458 transitions. [2021-05-03 14:40:37,203 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 458 transitions. Word has length 19 [2021-05-03 14:40:37,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:37,203 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 458 transitions. [2021-05-03 14:40:37,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:37,203 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 458 transitions. [2021-05-03 14:40:37,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:37,203 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:37,203 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:37,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2531 [2021-05-03 14:40:37,404 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:37,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:37,404 INFO L82 PathProgramCache]: Analyzing trace with hash -450607950, now seen corresponding path program 322 times [2021-05-03 14:40:37,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:37,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15986471] [2021-05-03 14:40:37,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:37,886 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:40:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:38,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15986471] [2021-05-03 14:40:38,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585943311] [2021-05-03 14:40:38,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:38,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:40:38,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:38,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:40:38,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:38,427 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 14:40:38,678 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 14:40:39,025 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 14:40:39,204 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 14:40:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:39,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:39,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:40:39,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772459197] [2021-05-03 14:40:39,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:40:39,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:39,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:40:39,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:40:39,382 INFO L87 Difference]: Start difference. First operand 209 states and 458 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:40,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:40,339 INFO L93 Difference]: Finished difference Result 241 states and 518 transitions. [2021-05-03 14:40:40,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:40:40,343 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:40,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:40,343 INFO L225 Difference]: With dead ends: 241 [2021-05-03 14:40:40,343 INFO L226 Difference]: Without dead ends: 241 [2021-05-03 14:40:40,343 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1956.6ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:40:40,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-03 14:40:40,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 204. [2021-05-03 14:40:40,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.1921182266009853) internal successors, (445), 203 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:40,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 445 transitions. [2021-05-03 14:40:40,345 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 445 transitions. Word has length 19 [2021-05-03 14:40:40,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:40,345 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 445 transitions. [2021-05-03 14:40:40,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:40,346 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 445 transitions. [2021-05-03 14:40:40,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:40,346 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:40,346 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:40,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2540 [2021-05-03 14:40:40,546 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:40,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:40,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1075773305, now seen corresponding path program 323 times [2021-05-03 14:40:40,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:40,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355462478] [2021-05-03 14:40:40,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:40,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:41,005 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2021-05-03 14:40:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:41,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355462478] [2021-05-03 14:40:41,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824967159] [2021-05-03 14:40:41,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:41,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:40:41,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:41,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:40:41,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:42,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:42,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:40:42,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486403655] [2021-05-03 14:40:42,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:40:42,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:42,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:40:42,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:40:42,178 INFO L87 Difference]: Start difference. First operand 204 states and 445 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:42,507 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-05-03 14:40:43,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:43,408 INFO L93 Difference]: Finished difference Result 240 states and 517 transitions. [2021-05-03 14:40:43,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:40:43,412 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:43,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:43,413 INFO L225 Difference]: With dead ends: 240 [2021-05-03 14:40:43,413 INFO L226 Difference]: Without dead ends: 240 [2021-05-03 14:40:43,413 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1597.2ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:40:43,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-03 14:40:43,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 206. [2021-05-03 14:40:43,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.1902439024390246) internal successors, (449), 205 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:43,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 449 transitions. [2021-05-03 14:40:43,415 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 449 transitions. Word has length 19 [2021-05-03 14:40:43,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:43,415 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 449 transitions. [2021-05-03 14:40:43,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:43,415 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 449 transitions. [2021-05-03 14:40:43,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:43,416 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:43,416 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:43,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2544 [2021-05-03 14:40:43,616 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:43,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:43,616 INFO L82 PathProgramCache]: Analyzing trace with hash -279037553, now seen corresponding path program 324 times [2021-05-03 14:40:43,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:43,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922018018] [2021-05-03 14:40:43,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:44,053 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:40:44,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:44,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922018018] [2021-05-03 14:40:44,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584766469] [2021-05-03 14:40:44,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:44,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:40:44,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:44,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:40:44,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:45,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:45,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:40:45,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945038404] [2021-05-03 14:40:45,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:40:45,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:45,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:40:45,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:40:45,264 INFO L87 Difference]: Start difference. First operand 206 states and 449 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:45,673 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-05-03 14:40:46,162 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-05-03 14:40:47,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:47,061 INFO L93 Difference]: Finished difference Result 251 states and 539 transitions. [2021-05-03 14:40:47,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:40:47,064 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:47,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:47,065 INFO L225 Difference]: With dead ends: 251 [2021-05-03 14:40:47,065 INFO L226 Difference]: Without dead ends: 251 [2021-05-03 14:40:47,065 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2097.0ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:40:47,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-03 14:40:47,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 207. [2021-05-03 14:40:47,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.1893203883495147) internal successors, (451), 206 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:47,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 451 transitions. [2021-05-03 14:40:47,067 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 451 transitions. Word has length 19 [2021-05-03 14:40:47,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:47,067 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 451 transitions. [2021-05-03 14:40:47,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:47,067 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 451 transitions. [2021-05-03 14:40:47,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:47,068 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:47,068 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:47,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2549,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:47,268 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:47,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:47,268 INFO L82 PathProgramCache]: Analyzing trace with hash 8512682, now seen corresponding path program 325 times [2021-05-03 14:40:47,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:47,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511192284] [2021-05-03 14:40:47,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:47,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:47,755 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:40:47,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:47,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511192284] [2021-05-03 14:40:47,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272556107] [2021-05-03 14:40:47,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:47,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:40:47,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:49,085 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 14:40:49,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:49,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:49,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:40:49,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384689333] [2021-05-03 14:40:49,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:40:49,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:49,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:40:49,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:40:49,282 INFO L87 Difference]: Start difference. First operand 207 states and 451 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:49,662 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-05-03 14:40:50,118 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-05-03 14:40:50,385 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 14 [2021-05-03 14:40:50,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:50,779 INFO L93 Difference]: Finished difference Result 231 states and 498 transitions. [2021-05-03 14:40:50,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:40:50,782 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:50,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:50,783 INFO L225 Difference]: With dead ends: 231 [2021-05-03 14:40:50,783 INFO L226 Difference]: Without dead ends: 231 [2021-05-03 14:40:50,783 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 2403.1ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:40:50,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-03 14:40:50,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 205. [2021-05-03 14:40:50,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.1911764705882355) internal successors, (447), 204 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:50,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 447 transitions. [2021-05-03 14:40:50,785 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 447 transitions. Word has length 19 [2021-05-03 14:40:50,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:50,785 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 447 transitions. [2021-05-03 14:40:50,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:50,785 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 447 transitions. [2021-05-03 14:40:50,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:50,785 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:50,785 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:50,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2558 [2021-05-03 14:40:50,986 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:50,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:50,986 INFO L82 PathProgramCache]: Analyzing trace with hash 227308713, now seen corresponding path program 326 times [2021-05-03 14:40:50,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:50,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359026620] [2021-05-03 14:40:50,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:51,385 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:40:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:51,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359026620] [2021-05-03 14:40:51,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171453172] [2021-05-03 14:40:51,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:51,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:40:51,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:51,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-03 14:40:51,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:51,904 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 14:40:52,209 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 14:40:53,167 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 14:40:53,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:53,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:53,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:40:53,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525698444] [2021-05-03 14:40:53,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:40:53,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:53,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:40:53,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:40:53,372 INFO L87 Difference]: Start difference. First operand 205 states and 447 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:53,775 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2021-05-03 14:40:54,113 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 14:40:54,420 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-05-03 14:40:54,829 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 14:40:55,477 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-05-03 14:40:55,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:55,600 INFO L93 Difference]: Finished difference Result 233 states and 499 transitions. [2021-05-03 14:40:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:40:55,602 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:55,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:55,602 INFO L225 Difference]: With dead ends: 233 [2021-05-03 14:40:55,602 INFO L226 Difference]: Without dead ends: 227 [2021-05-03 14:40:55,602 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 3468.6ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:40:55,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-03 14:40:55,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 205. [2021-05-03 14:40:55,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.1911764705882355) internal successors, (447), 204 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:55,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 447 transitions. [2021-05-03 14:40:55,604 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 447 transitions. Word has length 19 [2021-05-03 14:40:55,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:55,604 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 447 transitions. [2021-05-03 14:40:55,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:55,604 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 447 transitions. [2021-05-03 14:40:55,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:55,604 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:55,604 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:55,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2566 [2021-05-03 14:40:55,805 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:55,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:55,805 INFO L82 PathProgramCache]: Analyzing trace with hash 514858948, now seen corresponding path program 327 times [2021-05-03 14:40:55,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:55,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789968919] [2021-05-03 14:40:55,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:56,302 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:40:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:56,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789968919] [2021-05-03 14:40:56,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960792727] [2021-05-03 14:40:56,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:56,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:40:56,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:56,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:40:56,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:57,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:57,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:40:57,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720659209] [2021-05-03 14:40:57,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:40:57,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:57,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:40:57,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:40:57,556 INFO L87 Difference]: Start difference. First operand 205 states and 447 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:57,887 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-05-03 14:40:58,175 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 14:40:58,332 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-05-03 14:40:58,644 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 14:40:58,829 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2021-05-03 14:40:59,138 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-05-03 14:40:59,479 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2021-05-03 14:40:59,978 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2021-05-03 14:41:00,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:00,191 INFO L93 Difference]: Finished difference Result 294 states and 608 transitions. [2021-05-03 14:41:00,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:41:00,195 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:00,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:00,195 INFO L225 Difference]: With dead ends: 294 [2021-05-03 14:41:00,195 INFO L226 Difference]: Without dead ends: 294 [2021-05-03 14:41:00,195 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 3121.9ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:41:00,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-03 14:41:00,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 208. [2021-05-03 14:41:00,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.2028985507246377) internal successors, (456), 207 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:00,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 456 transitions. [2021-05-03 14:41:00,198 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 456 transitions. Word has length 19 [2021-05-03 14:41:00,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:00,198 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 456 transitions. [2021-05-03 14:41:00,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:00,198 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 456 transitions. [2021-05-03 14:41:00,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:00,198 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:00,198 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:00,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2572,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:00,399 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:00,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:00,399 INFO L82 PathProgramCache]: Analyzing trace with hash 816849228, now seen corresponding path program 328 times [2021-05-03 14:41:00,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:00,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352635106] [2021-05-03 14:41:00,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:00,852 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-05-03 14:41:01,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:01,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352635106] [2021-05-03 14:41:01,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369209149] [2021-05-03 14:41:01,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:01,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:41:01,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:01,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:41:01,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:01,372 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 14:41:01,621 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 14:41:01,862 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 14:41:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:02,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:02,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:02,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431988710] [2021-05-03 14:41:02,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:02,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:02,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:02,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:02,305 INFO L87 Difference]: Start difference. First operand 208 states and 456 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:03,171 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-05-03 14:41:03,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:03,641 INFO L93 Difference]: Finished difference Result 242 states and 520 transitions. [2021-05-03 14:41:03,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:41:03,644 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:03,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:03,644 INFO L225 Difference]: With dead ends: 242 [2021-05-03 14:41:03,644 INFO L226 Difference]: Without dead ends: 242 [2021-05-03 14:41:03,645 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2366.1ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:41:03,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-03 14:41:03,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 204. [2021-05-03 14:41:03,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.1921182266009853) internal successors, (445), 203 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:03,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 445 transitions. [2021-05-03 14:41:03,647 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 445 transitions. Word has length 19 [2021-05-03 14:41:03,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:03,647 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 445 transitions. [2021-05-03 14:41:03,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:03,647 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 445 transitions. [2021-05-03 14:41:03,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:03,647 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:03,647 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:03,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2581,329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:03,848 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:03,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:03,848 INFO L82 PathProgramCache]: Analyzing trace with hash -2095672083, now seen corresponding path program 329 times [2021-05-03 14:41:03,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:03,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813834177] [2021-05-03 14:41:03,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:04,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813834177] [2021-05-03 14:41:04,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770526306] [2021-05-03 14:41:04,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:04,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:41:04,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:04,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:41:04,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:05,100 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 14:41:05,731 WARN L205 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 14:41:05,979 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 14:41:06,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:06,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:06,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:06,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102975726] [2021-05-03 14:41:06,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:06,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:06,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:06,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:06,181 INFO L87 Difference]: Start difference. First operand 204 states and 445 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:06,600 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-05-03 14:41:06,918 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-05-03 14:41:07,244 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-05-03 14:41:07,677 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-05-03 14:41:08,671 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-05-03 14:41:09,113 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 14:41:09,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:09,161 INFO L93 Difference]: Finished difference Result 257 states and 541 transitions. [2021-05-03 14:41:09,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:41:09,163 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:09,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:09,163 INFO L225 Difference]: With dead ends: 257 [2021-05-03 14:41:09,163 INFO L226 Difference]: Without dead ends: 257 [2021-05-03 14:41:09,163 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3759.0ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:41:09,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-05-03 14:41:09,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 202. [2021-05-03 14:41:09,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.174129353233831) internal successors, (437), 201 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:09,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 437 transitions. [2021-05-03 14:41:09,165 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 437 transitions. Word has length 19 [2021-05-03 14:41:09,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:09,165 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 437 transitions. [2021-05-03 14:41:09,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:09,165 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 437 transitions. [2021-05-03 14:41:09,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:09,165 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:09,165 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:09,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2585 [2021-05-03 14:41:09,366 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:09,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:09,366 INFO L82 PathProgramCache]: Analyzing trace with hash -128430132, now seen corresponding path program 330 times [2021-05-03 14:41:09,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:09,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837349187] [2021-05-03 14:41:09,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:09,884 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:09,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837349187] [2021-05-03 14:41:09,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904523705] [2021-05-03 14:41:09,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:09,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:41:09,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:09,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-03 14:41:09,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:10,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:10,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:41:10,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263516938] [2021-05-03 14:41:10,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:41:10,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:10,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:41:10,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:41:10,998 INFO L87 Difference]: Start difference. First operand 202 states and 437 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:11,382 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-03 14:41:11,730 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-05-03 14:41:12,037 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 14:41:12,256 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-05-03 14:41:12,687 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 14:41:13,224 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 14:41:13,452 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-05-03 14:41:14,037 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-05-03 14:41:14,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:14,157 INFO L93 Difference]: Finished difference Result 294 states and 608 transitions. [2021-05-03 14:41:14,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:41:14,158 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:14,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:14,158 INFO L225 Difference]: With dead ends: 294 [2021-05-03 14:41:14,158 INFO L226 Difference]: Without dead ends: 294 [2021-05-03 14:41:14,158 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 3303.1ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:41:14,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-03 14:41:14,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 204. [2021-05-03 14:41:14,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.1921182266009853) internal successors, (445), 203 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:14,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 445 transitions. [2021-05-03 14:41:14,160 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 445 transitions. Word has length 19 [2021-05-03 14:41:14,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:14,160 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 445 transitions. [2021-05-03 14:41:14,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:14,161 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 445 transitions. [2021-05-03 14:41:14,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:14,161 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:14,161 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:14,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2592,331 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:14,361 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:14,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:14,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1366655981, now seen corresponding path program 331 times [2021-05-03 14:41:14,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:14,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137803831] [2021-05-03 14:41:14,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:14,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:14,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137803831] [2021-05-03 14:41:14,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896599249] [2021-05-03 14:41:14,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:14,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:41:14,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:16,034 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-05-03 14:41:16,273 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 14:41:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:16,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:16,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:16,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392298221] [2021-05-03 14:41:16,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:16,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:16,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:16,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:16,481 INFO L87 Difference]: Start difference. First operand 204 states and 445 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:16,843 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2021-05-03 14:41:17,471 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-05-03 14:41:18,105 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-05-03 14:41:18,437 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 22 [2021-05-03 14:41:18,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:18,631 INFO L93 Difference]: Finished difference Result 228 states and 487 transitions. [2021-05-03 14:41:18,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:41:18,632 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:18,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:18,632 INFO L225 Difference]: With dead ends: 228 [2021-05-03 14:41:18,632 INFO L226 Difference]: Without dead ends: 219 [2021-05-03 14:41:18,632 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 3192.4ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:41:18,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-03 14:41:18,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 204. [2021-05-03 14:41:18,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.1822660098522166) internal successors, (443), 203 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 443 transitions. [2021-05-03 14:41:18,634 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 443 transitions. Word has length 19 [2021-05-03 14:41:18,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:18,634 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 443 transitions. [2021-05-03 14:41:18,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:18,634 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 443 transitions. [2021-05-03 14:41:18,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:18,635 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:18,635 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:18,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2601 [2021-05-03 14:41:18,835 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:18,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:18,835 INFO L82 PathProgramCache]: Analyzing trace with hash -666285710, now seen corresponding path program 332 times [2021-05-03 14:41:18,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:18,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153442545] [2021-05-03 14:41:18,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:19,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153442545] [2021-05-03 14:41:19,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978444724] [2021-05-03 14:41:19,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:19,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:41:19,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:19,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:41:19,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:20,108 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 14:41:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:20,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:20,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:20,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486262666] [2021-05-03 14:41:20,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:20,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:20,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:20,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:20,488 INFO L87 Difference]: Start difference. First operand 204 states and 443 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:20,861 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-03 14:41:21,299 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 14:41:21,947 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 14:41:22,367 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2021-05-03 14:41:22,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:22,904 INFO L93 Difference]: Finished difference Result 246 states and 525 transitions. [2021-05-03 14:41:22,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:41:22,908 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:22,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:22,909 INFO L225 Difference]: With dead ends: 246 [2021-05-03 14:41:22,909 INFO L226 Difference]: Without dead ends: 246 [2021-05-03 14:41:22,909 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 2786.6ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:41:22,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-03 14:41:22,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 203. [2021-05-03 14:41:22,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.1831683168316833) internal successors, (441), 202 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:22,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 441 transitions. [2021-05-03 14:41:22,911 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 441 transitions. Word has length 19 [2021-05-03 14:41:22,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:22,911 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 441 transitions. [2021-05-03 14:41:22,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:22,911 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 441 transitions. [2021-05-03 14:41:22,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:22,911 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:22,911 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:23,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2609,333 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:23,112 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:23,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:23,112 INFO L82 PathProgramCache]: Analyzing trace with hash -159939444, now seen corresponding path program 333 times [2021-05-03 14:41:23,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:23,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976852291] [2021-05-03 14:41:23,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:23,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:23,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976852291] [2021-05-03 14:41:23,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544291755] [2021-05-03 14:41:23,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:23,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:41:23,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:23,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:41:23,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:24,323 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 14:41:24,505 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 14:41:24,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:24,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:24,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:24,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973279349] [2021-05-03 14:41:24,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:24,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:24,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:24,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:24,846 INFO L87 Difference]: Start difference. First operand 203 states and 441 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:25,201 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 14 [2021-05-03 14:41:26,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:26,460 INFO L93 Difference]: Finished difference Result 240 states and 511 transitions. [2021-05-03 14:41:26,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:41:26,463 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:26,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:26,464 INFO L225 Difference]: With dead ends: 240 [2021-05-03 14:41:26,464 INFO L226 Difference]: Without dead ends: 240 [2021-05-03 14:41:26,464 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1969.2ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:41:26,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-03 14:41:26,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 198. [2021-05-03 14:41:26,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.16751269035533) internal successors, (427), 197 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:26,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 427 transitions. [2021-05-03 14:41:26,466 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 427 transitions. Word has length 19 [2021-05-03 14:41:26,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:26,466 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 427 transitions. [2021-05-03 14:41:26,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:26,466 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 427 transitions. [2021-05-03 14:41:26,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:26,466 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:26,467 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:26,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2614,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:26,667 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:26,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:26,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1533464087, now seen corresponding path program 334 times [2021-05-03 14:41:26,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:26,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493795003] [2021-05-03 14:41:26,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:26,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:27,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493795003] [2021-05-03 14:41:27,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483814710] [2021-05-03 14:41:27,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:27,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:41:27,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:27,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:41:27,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:27,912 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 14:41:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:28,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:28,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:28,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607721317] [2021-05-03 14:41:28,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:28,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:28,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:28,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:28,246 INFO L87 Difference]: Start difference. First operand 198 states and 427 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:29,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:29,188 INFO L93 Difference]: Finished difference Result 221 states and 473 transitions. [2021-05-03 14:41:29,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:41:29,191 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:29,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:29,191 INFO L225 Difference]: With dead ends: 221 [2021-05-03 14:41:29,191 INFO L226 Difference]: Without dead ends: 221 [2021-05-03 14:41:29,192 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1303.7ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:29,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-05-03 14:41:29,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 199. [2021-05-03 14:41:29,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.1666666666666665) internal successors, (429), 198 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:29,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 429 transitions. [2021-05-03 14:41:29,194 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 429 transitions. Word has length 19 [2021-05-03 14:41:29,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:29,194 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 429 transitions. [2021-05-03 14:41:29,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:29,194 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 429 transitions. [2021-05-03 14:41:29,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:29,194 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:29,194 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:29,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2618,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:29,395 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:29,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:29,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1690507745, now seen corresponding path program 335 times [2021-05-03 14:41:29,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:29,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649389144] [2021-05-03 14:41:29,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:29,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649389144] [2021-05-03 14:41:29,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375708293] [2021-05-03 14:41:29,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:29,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:41:29,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:29,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:41:29,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:31,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:31,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:31,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433407825] [2021-05-03 14:41:31,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:31,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:31,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:31,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:31,026 INFO L87 Difference]: Start difference. First operand 199 states and 429 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:31,803 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 14:41:32,437 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 14:41:32,853 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2021-05-03 14:41:33,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:33,202 INFO L93 Difference]: Finished difference Result 237 states and 505 transitions. [2021-05-03 14:41:33,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:41:33,206 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:33,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:33,206 INFO L225 Difference]: With dead ends: 237 [2021-05-03 14:41:33,206 INFO L226 Difference]: Without dead ends: 237 [2021-05-03 14:41:33,207 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2421.2ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:41:33,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-03 14:41:33,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 200. [2021-05-03 14:41:33,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.1658291457286434) internal successors, (431), 199 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:33,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 431 transitions. [2021-05-03 14:41:33,209 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 431 transitions. Word has length 19 [2021-05-03 14:41:33,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:33,209 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 431 transitions. [2021-05-03 14:41:33,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:33,209 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 431 transitions. [2021-05-03 14:41:33,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:33,209 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:33,209 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:33,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2623,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:33,410 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:33,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:33,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1807723799, now seen corresponding path program 336 times [2021-05-03 14:41:33,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:33,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348545474] [2021-05-03 14:41:33,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:33,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348545474] [2021-05-03 14:41:33,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381473254] [2021-05-03 14:41:33,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:33,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:41:33,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:33,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:41:33,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:34,710 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 14:41:35,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:35,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:35,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:35,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015311426] [2021-05-03 14:41:35,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:35,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:35,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:35,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:35,097 INFO L87 Difference]: Start difference. First operand 200 states and 431 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:35,637 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-05-03 14:41:35,954 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-05-03 14:41:36,339 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 14:41:37,016 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 14:41:37,511 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 14:41:37,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:37,713 INFO L93 Difference]: Finished difference Result 249 states and 529 transitions. [2021-05-03 14:41:37,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:41:37,716 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:37,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:37,717 INFO L225 Difference]: With dead ends: 249 [2021-05-03 14:41:37,717 INFO L226 Difference]: Without dead ends: 249 [2021-05-03 14:41:37,717 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2782.6ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:41:37,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-03 14:41:37,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 201. [2021-05-03 14:41:37,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.165) internal successors, (433), 200 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:37,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 433 transitions. [2021-05-03 14:41:37,719 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 433 transitions. Word has length 19 [2021-05-03 14:41:37,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:37,719 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 433 transitions. [2021-05-03 14:41:37,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:37,719 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 433 transitions. [2021-05-03 14:41:37,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:37,719 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:37,719 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:37,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2628,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:37,920 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:37,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:37,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1520173564, now seen corresponding path program 337 times [2021-05-03 14:41:37,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:37,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316578069] [2021-05-03 14:41:37,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:37,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:38,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:38,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316578069] [2021-05-03 14:41:38,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337925848] [2021-05-03 14:41:38,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:38,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:41:38,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:39,462 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-05-03 14:41:39,687 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 14:41:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:39,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:39,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:39,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185764398] [2021-05-03 14:41:39,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:39,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:39,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:39,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:39,886 INFO L87 Difference]: Start difference. First operand 201 states and 433 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:40,202 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-03 14:41:40,793 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 14:41:41,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:41,293 INFO L93 Difference]: Finished difference Result 228 states and 487 transitions. [2021-05-03 14:41:41,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:41:41,297 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:41,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:41,297 INFO L225 Difference]: With dead ends: 228 [2021-05-03 14:41:41,297 INFO L226 Difference]: Without dead ends: 228 [2021-05-03 14:41:41,298 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2061.5ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:41:41,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-03 14:41:41,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 198. [2021-05-03 14:41:41,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.16751269035533) internal successors, (427), 197 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 427 transitions. [2021-05-03 14:41:41,300 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 427 transitions. Word has length 19 [2021-05-03 14:41:41,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:41,300 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 427 transitions. [2021-05-03 14:41:41,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:41,300 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 427 transitions. [2021-05-03 14:41:41,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:41,300 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:41,300 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:41,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2637 [2021-05-03 14:41:41,500 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:41,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:41,501 INFO L82 PathProgramCache]: Analyzing trace with hash 207372807, now seen corresponding path program 338 times [2021-05-03 14:41:41,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:41,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345149000] [2021-05-03 14:41:41,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:41,798 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:41:41,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:41,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345149000] [2021-05-03 14:41:41,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704295294] [2021-05-03 14:41:41,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:42,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:41:42,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:42,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-03 14:41:42,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:42,357 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 14:41:42,648 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 14:41:43,063 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 14:41:43,345 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 14:41:43,562 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 14:41:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:43,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:43,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:43,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917261903] [2021-05-03 14:41:43,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:43,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:43,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:43,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:43,803 INFO L87 Difference]: Start difference. First operand 198 states and 427 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:44,124 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-03 14:41:45,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:45,051 INFO L93 Difference]: Finished difference Result 226 states and 483 transitions. [2021-05-03 14:41:45,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:41:45,055 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:45,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:45,056 INFO L225 Difference]: With dead ends: 226 [2021-05-03 14:41:45,056 INFO L226 Difference]: Without dead ends: 226 [2021-05-03 14:41:45,056 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2179.2ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:41:45,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-03 14:41:45,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 200. [2021-05-03 14:41:45,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.1658291457286434) internal successors, (431), 199 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:45,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 431 transitions. [2021-05-03 14:41:45,058 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 431 transitions. Word has length 19 [2021-05-03 14:41:45,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:45,058 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 431 transitions. [2021-05-03 14:41:45,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:45,058 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 431 transitions. [2021-05-03 14:41:45,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:45,058 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:45,058 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:45,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2645 [2021-05-03 14:41:45,259 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:45,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:45,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1004108559, now seen corresponding path program 339 times [2021-05-03 14:41:45,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:45,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851827071] [2021-05-03 14:41:45,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:45,716 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-05-03 14:41:45,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:45,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851827071] [2021-05-03 14:41:45,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086686263] [2021-05-03 14:41:45,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:45,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:41:45,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:45,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 14:41:45,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:46,862 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-03 14:41:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:47,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:47,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:41:47,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104199238] [2021-05-03 14:41:47,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:41:47,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:47,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:41:47,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:41:47,126 INFO L87 Difference]: Start difference. First operand 200 states and 431 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:47,661 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 14:41:47,919 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2021-05-03 14:41:48,253 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 14:41:49,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:49,186 INFO L93 Difference]: Finished difference Result 250 states and 528 transitions. [2021-05-03 14:41:49,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:41:49,190 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:49,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:49,190 INFO L225 Difference]: With dead ends: 250 [2021-05-03 14:41:49,190 INFO L226 Difference]: Without dead ends: 247 [2021-05-03 14:41:49,190 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 2556.7ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:41:49,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-03 14:41:49,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 201. [2021-05-03 14:41:49,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.17) internal successors, (434), 200 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 434 transitions. [2021-05-03 14:41:49,192 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 434 transitions. Word has length 19 [2021-05-03 14:41:49,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:49,193 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 434 transitions. [2021-05-03 14:41:49,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:49,193 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 434 transitions. [2021-05-03 14:41:49,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:49,193 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:49,193 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:49,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2648 [2021-05-03 14:41:49,420 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:49,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:49,420 INFO L82 PathProgramCache]: Analyzing trace with hash 2131504652, now seen corresponding path program 340 times [2021-05-03 14:41:49,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:49,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996157091] [2021-05-03 14:41:49,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:49,892 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:41:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:50,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996157091] [2021-05-03 14:41:50,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747281942] [2021-05-03 14:41:50,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:50,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:41:50,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:50,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:41:50,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:51,190 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 14:41:51,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:51,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:51,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:51,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316312484] [2021-05-03 14:41:51,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:51,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:51,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:51,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:51,379 INFO L87 Difference]: Start difference. First operand 201 states and 434 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:52,008 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-05-03 14:41:52,431 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 14:41:52,927 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-05-03 14:41:53,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:53,322 INFO L93 Difference]: Finished difference Result 229 states and 487 transitions. [2021-05-03 14:41:53,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:41:53,324 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:53,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:53,325 INFO L225 Difference]: With dead ends: 229 [2021-05-03 14:41:53,325 INFO L226 Difference]: Without dead ends: 227 [2021-05-03 14:41:53,325 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 2647.8ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:41:53,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-03 14:41:53,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 199. [2021-05-03 14:41:53,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.1666666666666665) internal successors, (429), 198 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:53,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 429 transitions. [2021-05-03 14:41:53,327 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 429 transitions. Word has length 19 [2021-05-03 14:41:53,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:53,327 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 429 transitions. [2021-05-03 14:41:53,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:53,327 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 429 transitions. [2021-05-03 14:41:53,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:53,327 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:53,328 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:53,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2657 [2021-05-03 14:41:53,528 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:53,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:53,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1510454825, now seen corresponding path program 341 times [2021-05-03 14:41:53,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:53,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222984803] [2021-05-03 14:41:53,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:54,056 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:41:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:54,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222984803] [2021-05-03 14:41:54,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093445610] [2021-05-03 14:41:54,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:54,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:41:54,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:54,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:41:54,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:55,556 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 14:41:55,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:55,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:55,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:55,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208056208] [2021-05-03 14:41:55,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:55,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:55,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:55,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:55,706 INFO L87 Difference]: Start difference. First operand 199 states and 429 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:56,189 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-05-03 14:41:56,451 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 14 [2021-05-03 14:41:56,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:56,945 INFO L93 Difference]: Finished difference Result 221 states and 473 transitions. [2021-05-03 14:41:56,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:41:56,949 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:56,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:56,949 INFO L225 Difference]: With dead ends: 221 [2021-05-03 14:41:56,949 INFO L226 Difference]: Without dead ends: 221 [2021-05-03 14:41:56,950 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2417.7ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:41:56,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-05-03 14:41:56,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 199. [2021-05-03 14:41:56,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.1666666666666665) internal successors, (429), 198 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:56,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 429 transitions. [2021-05-03 14:41:56,954 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 429 transitions. Word has length 19 [2021-05-03 14:41:56,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:56,954 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 429 transitions. [2021-05-03 14:41:56,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:56,954 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 429 transitions. [2021-05-03 14:41:56,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:56,955 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:56,955 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:57,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2665,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:57,171 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:57,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:57,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1798005060, now seen corresponding path program 342 times [2021-05-03 14:41:57,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:57,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365962191] [2021-05-03 14:41:57,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:57,665 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:41:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:57,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365962191] [2021-05-03 14:41:57,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134484961] [2021-05-03 14:41:57,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:57,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:41:57,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:57,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-03 14:41:57,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:58,243 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 14:41:58,599 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 14:41:59,132 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 14:41:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:59,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:59,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:59,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359956222] [2021-05-03 14:41:59,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:59,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:59,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:59,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:59,352 INFO L87 Difference]: Start difference. First operand 199 states and 429 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:59,813 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-05-03 14:42:00,009 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2021-05-03 14:42:00,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:00,615 INFO L93 Difference]: Finished difference Result 268 states and 563 transitions. [2021-05-03 14:42:00,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:42:00,618 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:00,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:00,618 INFO L225 Difference]: With dead ends: 268 [2021-05-03 14:42:00,618 INFO L226 Difference]: Without dead ends: 268 [2021-05-03 14:42:00,618 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2239.4ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:42:00,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-05-03 14:42:00,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 202. [2021-05-03 14:42:00,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.1791044776119404) internal successors, (438), 201 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:00,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 438 transitions. [2021-05-03 14:42:00,620 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 438 transitions. Word has length 19 [2021-05-03 14:42:00,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:00,620 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 438 transitions. [2021-05-03 14:42:00,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:00,621 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 438 transitions. [2021-05-03 14:42:00,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:00,621 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:00,621 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:00,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2673 [2021-05-03 14:42:00,821 INFO L428 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:00,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:00,822 INFO L82 PathProgramCache]: Analyzing trace with hash 2099995340, now seen corresponding path program 343 times [2021-05-03 14:42:00,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:00,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300418691] [2021-05-03 14:42:00,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:00,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:01,338 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:42:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:01,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300418691] [2021-05-03 14:42:01,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118117255] [2021-05-03 14:42:01,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:01,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:42:01,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:02,461 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-03 14:42:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:02,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:02,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:42:02,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524654008] [2021-05-03 14:42:02,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:42:02,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:02,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:42:02,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:42:02,639 INFO L87 Difference]: Start difference. First operand 202 states and 438 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:03,101 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-05-03 14:42:04,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:04,098 INFO L93 Difference]: Finished difference Result 240 states and 511 transitions. [2021-05-03 14:42:04,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:42:04,100 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:04,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:04,100 INFO L225 Difference]: With dead ends: 240 [2021-05-03 14:42:04,100 INFO L226 Difference]: Without dead ends: 240 [2021-05-03 14:42:04,100 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1886.9ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:42:04,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-03 14:42:04,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 197. [2021-05-03 14:42:04,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.1683673469387754) internal successors, (425), 196 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:04,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 425 transitions. [2021-05-03 14:42:04,102 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 425 transitions. Word has length 19 [2021-05-03 14:42:04,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:04,102 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 425 transitions. [2021-05-03 14:42:04,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:04,102 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 425 transitions. [2021-05-03 14:42:04,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:04,102 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:04,102 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:04,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2680,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:04,303 INFO L428 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:04,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:04,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1474829985, now seen corresponding path program 344 times [2021-05-03 14:42:04,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:04,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413621346] [2021-05-03 14:42:04,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:04,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:04,840 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:42:05,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:05,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413621346] [2021-05-03 14:42:05,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183620182] [2021-05-03 14:42:05,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:05,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:42:05,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:42:05,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-03 14:42:05,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:05,442 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 14:42:05,699 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 14:42:05,955 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 14:42:06,251 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 14:42:06,579 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 14:42:06,871 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 14:42:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:06,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:06,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:42:06,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175424314] [2021-05-03 14:42:06,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:42:06,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:06,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:42:06,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:42:06,945 INFO L87 Difference]: Start difference. First operand 197 states and 425 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:08,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:08,181 INFO L93 Difference]: Finished difference Result 224 states and 479 transitions. [2021-05-03 14:42:08,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:42:08,185 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:08,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:08,186 INFO L225 Difference]: With dead ends: 224 [2021-05-03 14:42:08,186 INFO L226 Difference]: Without dead ends: 224 [2021-05-03 14:42:08,186 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2354.2ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:42:08,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-03 14:42:08,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 197. [2021-05-03 14:42:08,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.1683673469387754) internal successors, (425), 196 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:08,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 425 transitions. [2021-05-03 14:42:08,188 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 425 transitions. Word has length 19 [2021-05-03 14:42:08,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:08,188 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 425 transitions. [2021-05-03 14:42:08,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:08,188 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 425 transitions. [2021-05-03 14:42:08,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:08,188 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:08,188 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:08,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2685 [2021-05-03 14:42:08,389 INFO L428 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:08,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:08,389 INFO L82 PathProgramCache]: Analyzing trace with hash -2023401559, now seen corresponding path program 345 times [2021-05-03 14:42:08,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:08,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533638692] [2021-05-03 14:42:08,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:08,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:08,905 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 14:42:09,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:09,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533638692] [2021-05-03 14:42:09,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675168623] [2021-05-03 14:42:09,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:09,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:42:09,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:42:09,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:42:09,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:09,502 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 14:42:09,798 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 14:42:09,981 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 14:42:10,349 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 14:42:10,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:10,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:10,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:42:10,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093979517] [2021-05-03 14:42:10,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:42:10,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:10,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:42:10,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:42:10,539 INFO L87 Difference]: Start difference. First operand 197 states and 425 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:11,392 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-05-03 14:42:12,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:12,215 INFO L93 Difference]: Finished difference Result 238 states and 507 transitions. [2021-05-03 14:42:12,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:42:12,219 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:12,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:12,220 INFO L225 Difference]: With dead ends: 238 [2021-05-03 14:42:12,220 INFO L226 Difference]: Without dead ends: 238 [2021-05-03 14:42:12,220 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2486.0ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:42:12,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-03 14:42:12,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 197. [2021-05-03 14:42:12,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.1683673469387754) internal successors, (425), 196 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:12,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 425 transitions. [2021-05-03 14:42:12,222 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 425 transitions. Word has length 19 [2021-05-03 14:42:12,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:12,222 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 425 transitions. [2021-05-03 14:42:12,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:12,222 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 425 transitions. [2021-05-03 14:42:12,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:12,223 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:12,223 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:12,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2688 [2021-05-03 14:42:12,423 INFO L428 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:12,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:12,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1735851324, now seen corresponding path program 346 times [2021-05-03 14:42:12,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:12,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443041815] [2021-05-03 14:42:12,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:12,917 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 Received shutdown request... [2021-05-03 14:42:12,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2696 [2021-05-03 14:42:12,930 WARN L545 AbstractCegarLoop]: Verification canceled [2021-05-03 14:42:12,933 WARN L224 ceAbstractionStarter]: Timeout [2021-05-03 14:42:12,933 INFO L202 PluginConnector]: Adding new model chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 02:42:12 BasicIcfg [2021-05-03 14:42:12,933 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 14:42:12,934 INFO L168 Benchmark]: Toolchain (without parser) took 824994.01 ms. Allocated memory was 356.5 MB in the beginning and 559.9 MB in the end (delta: 203.4 MB). Free memory was 335.5 MB in the beginning and 251.1 MB in the end (delta: 84.4 MB). Peak memory consumption was 288.8 MB. Max. memory is 16.0 GB. [2021-05-03 14:42:12,934 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 356.5 MB. Free memory is still 336.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 14:42:12,934 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.45 ms. Allocated memory is still 356.5 MB. Free memory was 335.4 MB in the beginning and 333.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 14:42:12,934 INFO L168 Benchmark]: Boogie Preprocessor took 16.37 ms. Allocated memory is still 356.5 MB. Free memory was 333.9 MB in the beginning and 332.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 14:42:12,934 INFO L168 Benchmark]: RCFGBuilder took 495.18 ms. Allocated memory is still 356.5 MB. Free memory was 332.9 MB in the beginning and 337.5 MB in the end (delta: -4.7 MB). Peak memory consumption was 21.6 MB. Max. memory is 16.0 GB. [2021-05-03 14:42:12,934 INFO L168 Benchmark]: TraceAbstraction took 824446.71 ms. Allocated memory was 356.5 MB in the beginning and 559.9 MB in the end (delta: 203.4 MB). Free memory was 336.5 MB in the beginning and 251.1 MB in the end (delta: 85.4 MB). Peak memory consumption was 288.2 MB. Max. memory is 16.0 GB. [2021-05-03 14:42:12,935 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 356.5 MB. Free memory is still 336.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.45 ms. Allocated memory is still 356.5 MB. Free memory was 335.4 MB in the beginning and 333.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.37 ms. Allocated memory is still 356.5 MB. Free memory was 333.9 MB in the beginning and 332.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 495.18 ms. Allocated memory is still 356.5 MB. Free memory was 332.9 MB in the beginning and 337.5 MB in the end (delta: -4.7 MB). Peak memory consumption was 21.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 824446.71 ms. Allocated memory was 356.5 MB in the beginning and 559.9 MB in the end (delta: 203.4 MB). Free memory was 336.5 MB in the beginning and 251.1 MB in the end (delta: 85.4 MB). Peak memory consumption was 288.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 80). Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 4,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 8 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 824353.6ms, OverallIterations: 352, TraceHistogramMax: 4, EmptinessCheckTime: 117.2ms, AutomataDifference: 424713.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9630 SDtfs, 20761 SDslu, 72208 SDs, 0 SdLazy, 110519 SolverSat, 7601 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 74586.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11994 GetRequests, 3971 SyntacticMatches, 1 SemanticMatches, 8022 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33159 ImplicationChecksByTransitivity, 536745.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=228occurred in iteration=269, InterpolantAutomatonStates: 5407, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 792.7ms AutomataMinimizationTime, 351 MinimizatonAttempts, 12508 StatesRemovedByMinimization, 349 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1638.4ms SsaConstructionTime, 5926.1ms SatisfiabilityAnalysisTime, 314233.8ms InterpolantComputationTime, 12227 NumberOfCodeBlocks, 12227 NumberOfCodeBlocksAsserted, 1188 NumberOfCheckSat, 11531 ConstructedInterpolants, 0 QuantifiedInterpolants, 185548 SizeOfPredicates, 3287 NumberOfNonLiveVariables, 30534 ConjunctsInSsa, 10885 ConjunctsInUnsatCore, 696 InterpolantComputations, 6 PerfectInterpolantSequences, 919/7795 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown