/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/test/easy1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 05:38:26,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 05:38:26,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 05:38:26,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 05:38:26,999 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 [2021-04-15 05:38:27,032 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 05:38:27,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 05:38:27,033 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 05:38:27,033 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 05:38:27,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 05:38:27,035 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 05:38:27,036 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 05:38:27,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 05:38:27,036 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 05:38:27,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 05:38:27,036 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 05:38:27,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 05:38:27,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 05:38:27,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 05:38:27,037 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 05:38:27,037 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 05:38:27,037 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 05:38:27,037 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 05:38:27,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 05:38:27,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 05:38:27,038 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 05:38:27,038 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 05:38:27,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 05:38:27,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 05:38:27,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 05:38:27,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 05:38:27,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 05:38:27,039 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 05:38:27,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 05:38:27,039 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 05:38:27,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 05:38:27,039 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 05:38:27,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 05:38:27,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 05:38:27,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 05:38:27,252 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 05:38:27,253 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 05:38:27,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy1.wvr.bpl [2021-04-15 05:38:27,254 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy1.wvr.bpl' [2021-04-15 05:38:27,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 05:38:27,283 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 05:38:27,284 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 05:38:27,284 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 05:38:27,284 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 05:38:27,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:38:27" (1/1) ... [2021-04-15 05:38:27,296 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:38:27" (1/1) ... [2021-04-15 05:38:27,301 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 05:38:27,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 05:38:27,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 05:38:27,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 05:38:27,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:38:27" (1/1) ... [2021-04-15 05:38:27,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:38:27" (1/1) ... [2021-04-15 05:38:27,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:38:27" (1/1) ... [2021-04-15 05:38:27,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:38:27" (1/1) ... [2021-04-15 05:38:27,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:38:27" (1/1) ... [2021-04-15 05:38:27,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:38:27" (1/1) ... [2021-04-15 05:38:27,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:38:27" (1/1) ... [2021-04-15 05:38:27,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 05:38:27,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 05:38:27,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 05:38:27,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 05:38:27,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:38:27" (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 [2021-04-15 05:38:27,368 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 05:38:27,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 05:38:27,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 05:38:27,369 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 05:38:27,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 05:38:27,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 05:38:27,369 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 05:38:27,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 05:38:27,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 05:38:27,370 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 05:38:27,451 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 05:38:27,451 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 05:38:27,452 INFO L202 PluginConnector]: Adding new model easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 05:38:27 BoogieIcfgContainer [2021-04-15 05:38:27,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 05:38:27,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 05:38:27,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 05:38:27,466 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 05:38:27,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:38:27" (1/2) ... [2021-04-15 05:38:27,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef9f616 and model type easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 05:38:27, skipping insertion in model container [2021-04-15 05:38:27,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 05:38:27" (2/2) ... [2021-04-15 05:38:27,468 INFO L111 eAbstractionObserver]: Analyzing ICFG easy1.wvr.bpl [2021-04-15 05:38:27,471 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 05:38:27,471 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 05:38:27,473 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 05:38:27,474 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 05:38:27,494 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-04-15 05:38:27,505 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-04-15 05:38:27,517 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 05:38:27,517 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 05:38:27,517 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 05:38:27,517 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 05:38:27,517 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 05:38:27,517 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 05:38:27,517 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 05:38:27,517 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 05:38:27,523 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2021-04-15 05:38:27,529 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:27,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:27,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-15 05:38:27,534 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:27,535 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:27,535 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:27,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:27,538 INFO L82 PathProgramCache]: Analyzing trace with hash -64585265, now seen corresponding path program 1 times [2021-04-15 05:38:27,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:27,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189768742] [2021-04-15 05:38:27,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:27,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189768742] [2021-04-15 05:38:27,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:38:27,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-04-15 05:38:27,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980653352] [2021-04-15 05:38:27,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 05:38:27,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:27,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 05:38:27,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 05:38:27,637 INFO L87 Difference]: Start difference. First operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 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 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:27,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:27,662 INFO L93 Difference]: Finished difference Result 54 states and 102 transitions. [2021-04-15 05:38:27,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 05:38:27,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-04-15 05:38:27,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:27,669 INFO L225 Difference]: With dead ends: 54 [2021-04-15 05:38:27,669 INFO L226 Difference]: Without dead ends: 47 [2021-04-15 05:38:27,670 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 05:38:27,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-04-15 05:38:27,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-04-15 05:38:27,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:27,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-04-15 05:38:27,697 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 11 [2021-04-15 05:38:27,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:27,697 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-04-15 05:38:27,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:27,697 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-04-15 05:38:27,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 05:38:27,698 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:27,698 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:27,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 05:38:27,698 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:27,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:27,699 INFO L82 PathProgramCache]: Analyzing trace with hash 732040657, now seen corresponding path program 1 times [2021-04-15 05:38:27,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:27,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292744067] [2021-04-15 05:38:27,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:27,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:27,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292744067] [2021-04-15 05:38:27,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126855669] [2021-04-15 05:38:27,729 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 [2021-04-15 05:38:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:27,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-04-15 05:38:27,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:27,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:27,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-04-15 05:38:27,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596152436] [2021-04-15 05:38:27,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 05:38:27,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:27,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 05:38:27,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 05:38:27,826 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2021-04-15 05:38:27,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:27,868 INFO L93 Difference]: Finished difference Result 61 states and 109 transitions. [2021-04-15 05:38:27,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 05:38:27,868 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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 [2021-04-15 05:38:27,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:27,869 INFO L225 Difference]: With dead ends: 61 [2021-04-15 05:38:27,869 INFO L226 Difference]: Without dead ends: 61 [2021-04-15 05:38:27,869 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:38:27,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-04-15 05:38:27,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2021-04-15 05:38:27,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:27,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 73 transitions. [2021-04-15 05:38:27,874 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 73 transitions. Word has length 13 [2021-04-15 05:38:27,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:27,874 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 73 transitions. [2021-04-15 05:38:27,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2021-04-15 05:38:27,875 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 73 transitions. [2021-04-15 05:38:27,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 05:38:27,875 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:27,875 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:28,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-04-15 05:38:28,076 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:28,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:28,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1434845965, now seen corresponding path program 1 times [2021-04-15 05:38:28,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:28,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837498899] [2021-04-15 05:38:28,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:28,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837498899] [2021-04-15 05:38:28,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:38:28,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 05:38:28,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270612907] [2021-04-15 05:38:28,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 05:38:28,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:28,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 05:38:28,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 05:38:28,106 INFO L87 Difference]: Start difference. First operand 38 states and 73 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2021-04-15 05:38:28,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:28,154 INFO L93 Difference]: Finished difference Result 68 states and 122 transitions. [2021-04-15 05:38:28,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 05:38:28,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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 [2021-04-15 05:38:28,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:28,157 INFO L225 Difference]: With dead ends: 68 [2021-04-15 05:38:28,157 INFO L226 Difference]: Without dead ends: 63 [2021-04-15 05:38:28,157 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:38:28,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-04-15 05:38:28,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2021-04-15 05:38:28,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 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) [2021-04-15 05:38:28,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 88 transitions. [2021-04-15 05:38:28,162 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 88 transitions. Word has length 13 [2021-04-15 05:38:28,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:28,162 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 88 transitions. [2021-04-15 05:38:28,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2021-04-15 05:38:28,163 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 88 transitions. [2021-04-15 05:38:28,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 05:38:28,163 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:28,163 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:28,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 05:38:28,163 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:28,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:28,164 INFO L82 PathProgramCache]: Analyzing trace with hash 169918105, now seen corresponding path program 2 times [2021-04-15 05:38:28,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:28,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100897262] [2021-04-15 05:38:28,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:28,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:28,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100897262] [2021-04-15 05:38:28,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:38:28,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 05:38:28,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204208338] [2021-04-15 05:38:28,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 05:38:28,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:28,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 05:38:28,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 05:38:28,181 INFO L87 Difference]: Start difference. First operand 46 states and 88 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2021-04-15 05:38:28,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:28,220 INFO L93 Difference]: Finished difference Result 48 states and 91 transitions. [2021-04-15 05:38:28,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 05:38:28,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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 [2021-04-15 05:38:28,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:28,221 INFO L225 Difference]: With dead ends: 48 [2021-04-15 05:38:28,221 INFO L226 Difference]: Without dead ends: 48 [2021-04-15 05:38:28,221 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:38:28,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-04-15 05:38:28,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-04-15 05:38:28,228 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) [2021-04-15 05:38:28,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2021-04-15 05:38:28,229 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 13 [2021-04-15 05:38:28,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:28,229 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2021-04-15 05:38:28,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2021-04-15 05:38:28,229 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2021-04-15 05:38:28,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 05:38:28,230 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:28,230 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:28,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-15 05:38:28,230 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:28,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:28,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1213979977, now seen corresponding path program 2 times [2021-04-15 05:38:28,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:28,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347138036] [2021-04-15 05:38:28,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:28,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347138036] [2021-04-15 05:38:28,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:38:28,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 05:38:28,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957163309] [2021-04-15 05:38:28,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 05:38:28,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:28,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 05:38:28,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 05:38:28,258 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2021-04-15 05:38:28,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:28,291 INFO L93 Difference]: Finished difference Result 48 states and 89 transitions. [2021-04-15 05:38:28,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 05:38:28,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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 [2021-04-15 05:38:28,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:28,292 INFO L225 Difference]: With dead ends: 48 [2021-04-15 05:38:28,292 INFO L226 Difference]: Without dead ends: 46 [2021-04-15 05:38:28,293 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:38:28,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-04-15 05:38:28,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2021-04-15 05:38:28,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:28,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2021-04-15 05:38:28,306 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 13 [2021-04-15 05:38:28,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:28,306 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2021-04-15 05:38:28,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2021-04-15 05:38:28,306 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2021-04-15 05:38:28,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 05:38:28,306 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:28,307 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:28,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-04-15 05:38:28,307 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:28,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:28,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1806788977, now seen corresponding path program 1 times [2021-04-15 05:38:28,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:28,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534671267] [2021-04-15 05:38:28,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:28,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534671267] [2021-04-15 05:38:28,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702297383] [2021-04-15 05:38:28,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-04-15 05:38:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:28,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:38:28,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:28,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:28,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 7 [2021-04-15 05:38:28,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500099900] [2021-04-15 05:38:28,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 05:38:28,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:28,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 05:38:28,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-04-15 05:38:28,464 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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) [2021-04-15 05:38:28,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:28,575 INFO L93 Difference]: Finished difference Result 129 states and 238 transitions. [2021-04-15 05:38:28,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 05:38:28,575 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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 15 [2021-04-15 05:38:28,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:28,578 INFO L225 Difference]: With dead ends: 129 [2021-04-15 05:38:28,579 INFO L226 Difference]: Without dead ends: 122 [2021-04-15 05:38:28,579 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:38:28,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-04-15 05:38:28,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 64. [2021-04-15 05:38:28,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 63 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:28,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 130 transitions. [2021-04-15 05:38:28,594 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 130 transitions. Word has length 15 [2021-04-15 05:38:28,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:28,595 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 130 transitions. [2021-04-15 05:38:28,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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) [2021-04-15 05:38:28,595 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 130 transitions. [2021-04-15 05:38:28,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 05:38:28,595 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:28,595 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:28,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:28,797 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:28,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:28,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1307356559, now seen corresponding path program 2 times [2021-04-15 05:38:28,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:28,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439647524] [2021-04-15 05:38:28,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:28,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439647524] [2021-04-15 05:38:28,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773332267] [2021-04-15 05:38:28,880 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 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 [2021-04-15 05:38:28,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:38:28,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:28,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:38:28,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:38:28,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-04-15 05:38:28,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-04-15 05:38:28,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604377846] [2021-04-15 05:38:28,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 05:38:28,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:28,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 05:38:28,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-04-15 05:38:28,944 INFO L87 Difference]: Start difference. First operand 64 states and 130 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:28,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:28,967 INFO L93 Difference]: Finished difference Result 114 states and 226 transitions. [2021-04-15 05:38:28,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 05:38:28,967 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:38:28,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:28,968 INFO L225 Difference]: With dead ends: 114 [2021-04-15 05:38:28,968 INFO L226 Difference]: Without dead ends: 107 [2021-04-15 05:38:28,968 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-04-15 05:38:28,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-04-15 05:38:28,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 82. [2021-04-15 05:38:28,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.1481481481481484) internal successors, (174), 81 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) [2021-04-15 05:38:28,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 174 transitions. [2021-04-15 05:38:28,972 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 174 transitions. Word has length 15 [2021-04-15 05:38:28,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:28,972 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 174 transitions. [2021-04-15 05:38:28,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:28,972 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 174 transitions. [2021-04-15 05:38:28,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 05:38:28,973 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:28,973 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:29,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:29,188 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:29,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:29,188 INFO L82 PathProgramCache]: Analyzing trace with hash -2080643123, now seen corresponding path program 3 times [2021-04-15 05:38:29,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:29,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126087152] [2021-04-15 05:38:29,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:29,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126087152] [2021-04-15 05:38:29,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075388146] [2021-04-15 05:38:29,218 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 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 [2021-04-15 05:38:29,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:38:29,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:29,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 05:38:29,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:29,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:29,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 05:38:29,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615220506] [2021-04-15 05:38:29,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 05:38:29,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:29,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 05:38:29,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-15 05:38:29,297 INFO L87 Difference]: Start difference. First operand 82 states and 174 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:29,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:29,351 INFO L93 Difference]: Finished difference Result 146 states and 283 transitions. [2021-04-15 05:38:29,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 05:38:29,351 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:38:29,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:29,352 INFO L225 Difference]: With dead ends: 146 [2021-04-15 05:38:29,352 INFO L226 Difference]: Without dead ends: 135 [2021-04-15 05:38:29,353 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:38:29,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-04-15 05:38:29,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 102. [2021-04-15 05:38:29,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1485148514851486) internal successors, (217), 101 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:29,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 217 transitions. [2021-04-15 05:38:29,368 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 217 transitions. Word has length 17 [2021-04-15 05:38:29,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:29,368 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 217 transitions. [2021-04-15 05:38:29,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:29,369 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 217 transitions. [2021-04-15 05:38:29,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 05:38:29,371 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:29,371 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:29,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:29,573 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:29,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:29,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1376961195, now seen corresponding path program 4 times [2021-04-15 05:38:29,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:29,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196885808] [2021-04-15 05:38:29,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:29,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196885808] [2021-04-15 05:38:29,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972437190] [2021-04-15 05:38:29,596 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 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 [2021-04-15 05:38:29,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:38:29,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:29,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 05:38:29,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:29,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:29,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-04-15 05:38:29,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913843254] [2021-04-15 05:38:29,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 05:38:29,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:29,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 05:38:29,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:38:29,645 INFO L87 Difference]: Start difference. First operand 102 states and 217 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:29,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:29,692 INFO L93 Difference]: Finished difference Result 137 states and 266 transitions. [2021-04-15 05:38:29,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 05:38:29,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:38:29,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:29,693 INFO L225 Difference]: With dead ends: 137 [2021-04-15 05:38:29,693 INFO L226 Difference]: Without dead ends: 137 [2021-04-15 05:38:29,695 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 05:38:29,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-04-15 05:38:29,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 100. [2021-04-15 05:38:29,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.1313131313131315) internal successors, (211), 99 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) [2021-04-15 05:38:29,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 211 transitions. [2021-04-15 05:38:29,699 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 211 transitions. Word has length 17 [2021-04-15 05:38:29,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:29,700 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 211 transitions. [2021-04-15 05:38:29,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:29,700 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 211 transitions. [2021-04-15 05:38:29,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 05:38:29,702 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:29,702 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:29,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:29,911 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:29,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:29,912 INFO L82 PathProgramCache]: Analyzing trace with hash 397922747, now seen corresponding path program 5 times [2021-04-15 05:38:29,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:29,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136649049] [2021-04-15 05:38:29,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:29,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136649049] [2021-04-15 05:38:29,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000136289] [2021-04-15 05:38:29,939 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 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 [2021-04-15 05:38:29,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:38:29,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:29,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 05:38:29,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:29,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:29,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:29,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-04-15 05:38:29,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488159506] [2021-04-15 05:38:29,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 05:38:29,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:29,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 05:38:29,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:38:30,000 INFO L87 Difference]: Start difference. First operand 100 states and 211 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:30,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:30,035 INFO L93 Difference]: Finished difference Result 126 states and 250 transitions. [2021-04-15 05:38:30,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 05:38:30,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:38:30,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:30,036 INFO L225 Difference]: With dead ends: 126 [2021-04-15 05:38:30,036 INFO L226 Difference]: Without dead ends: 124 [2021-04-15 05:38:30,036 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 05:38:30,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-04-15 05:38:30,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 100. [2021-04-15 05:38:30,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.111111111111111) internal successors, (209), 99 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:30,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 209 transitions. [2021-04-15 05:38:30,039 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 209 transitions. Word has length 17 [2021-04-15 05:38:30,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:30,039 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 209 transitions. [2021-04-15 05:38:30,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:30,039 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 209 transitions. [2021-04-15 05:38:30,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 05:38:30,039 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:30,040 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:30,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:30,241 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:30,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:30,241 INFO L82 PathProgramCache]: Analyzing trace with hash 613173649, now seen corresponding path program 6 times [2021-04-15 05:38:30,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:30,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539677191] [2021-04-15 05:38:30,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:30,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539677191] [2021-04-15 05:38:30,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782577737] [2021-04-15 05:38:30,269 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 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 [2021-04-15 05:38:30,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:38:30,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:30,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 05:38:30,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:30,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:30,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-04-15 05:38:30,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722638960] [2021-04-15 05:38:30,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 05:38:30,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:30,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 05:38:30,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:38:30,315 INFO L87 Difference]: Start difference. First operand 100 states and 209 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:30,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:30,352 INFO L93 Difference]: Finished difference Result 174 states and 339 transitions. [2021-04-15 05:38:30,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 05:38:30,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:38:30,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:30,353 INFO L225 Difference]: With dead ends: 174 [2021-04-15 05:38:30,353 INFO L226 Difference]: Without dead ends: 174 [2021-04-15 05:38:30,353 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 05:38:30,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-04-15 05:38:30,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 109. [2021-04-15 05:38:30,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.1666666666666665) internal successors, (234), 108 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) [2021-04-15 05:38:30,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 234 transitions. [2021-04-15 05:38:30,356 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 234 transitions. Word has length 17 [2021-04-15 05:38:30,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:30,357 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 234 transitions. [2021-04-15 05:38:30,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:30,358 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 234 transitions. [2021-04-15 05:38:30,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 05:38:30,358 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:30,358 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:30,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:30,573 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:30,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:30,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1315978957, now seen corresponding path program 7 times [2021-04-15 05:38:30,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:30,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629071959] [2021-04-15 05:38:30,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:30,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:30,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629071959] [2021-04-15 05:38:30,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656135499] [2021-04-15 05:38:30,597 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 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 [2021-04-15 05:38:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:30,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 05:38:30,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:30,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:30,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-04-15 05:38:30,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500917796] [2021-04-15 05:38:30,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 05:38:30,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:30,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 05:38:30,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:38:30,641 INFO L87 Difference]: Start difference. First operand 109 states and 234 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:30,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:30,678 INFO L93 Difference]: Finished difference Result 155 states and 313 transitions. [2021-04-15 05:38:30,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 05:38:30,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:38:30,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:30,679 INFO L225 Difference]: With dead ends: 155 [2021-04-15 05:38:30,679 INFO L226 Difference]: Without dead ends: 152 [2021-04-15 05:38:30,680 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 05:38:30,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-04-15 05:38:30,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 115. [2021-04-15 05:38:30,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.2280701754385963) internal successors, (254), 114 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:30,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 254 transitions. [2021-04-15 05:38:30,683 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 254 transitions. Word has length 17 [2021-04-15 05:38:30,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:30,683 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 254 transitions. [2021-04-15 05:38:30,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:30,683 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 254 transitions. [2021-04-15 05:38:30,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 05:38:30,683 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:30,683 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:30,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-04-15 05:38:30,897 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:30,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:30,897 INFO L82 PathProgramCache]: Analyzing trace with hash 51051097, now seen corresponding path program 8 times [2021-04-15 05:38:30,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:30,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384221897] [2021-04-15 05:38:30,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:30,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:30,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384221897] [2021-04-15 05:38:30,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153589673] [2021-04-15 05:38:30,913 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:30,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:38:30,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:30,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 05:38:30,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:30,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:30,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-04-15 05:38:30,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412017586] [2021-04-15 05:38:30,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 05:38:30,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:30,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 05:38:30,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:38:30,971 INFO L87 Difference]: Start difference. First operand 115 states and 254 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:31,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:31,003 INFO L93 Difference]: Finished difference Result 160 states and 326 transitions. [2021-04-15 05:38:31,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 05:38:31,003 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:38:31,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:31,004 INFO L225 Difference]: With dead ends: 160 [2021-04-15 05:38:31,004 INFO L226 Difference]: Without dead ends: 160 [2021-04-15 05:38:31,004 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 05:38:31,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-04-15 05:38:31,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 117. [2021-04-15 05:38:31,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.2241379310344827) internal successors, (258), 116 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:31,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 258 transitions. [2021-04-15 05:38:31,008 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 258 transitions. Word has length 17 [2021-04-15 05:38:31,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:31,008 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 258 transitions. [2021-04-15 05:38:31,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:31,008 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 258 transitions. [2021-04-15 05:38:31,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 05:38:31,009 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:31,009 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:31,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:31,217 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:31,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:31,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1332846985, now seen corresponding path program 9 times [2021-04-15 05:38:31,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:31,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493402202] [2021-04-15 05:38:31,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:31,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493402202] [2021-04-15 05:38:31,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004982214] [2021-04-15 05:38:31,240 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 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 [2021-04-15 05:38:31,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:38:31,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:31,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 05:38:31,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:31,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:31,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:31,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-04-15 05:38:31,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905584758] [2021-04-15 05:38:31,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 05:38:31,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:31,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 05:38:31,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:38:31,289 INFO L87 Difference]: Start difference. First operand 117 states and 258 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:31,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:31,331 INFO L93 Difference]: Finished difference Result 170 states and 342 transitions. [2021-04-15 05:38:31,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 05:38:31,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:38:31,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:31,333 INFO L225 Difference]: With dead ends: 170 [2021-04-15 05:38:31,333 INFO L226 Difference]: Without dead ends: 168 [2021-04-15 05:38:31,334 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 05:38:31,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-04-15 05:38:31,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2021-04-15 05:38:31,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.2033898305084745) internal successors, (260), 118 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:31,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 260 transitions. [2021-04-15 05:38:31,340 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 260 transitions. Word has length 17 [2021-04-15 05:38:31,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:31,340 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 260 transitions. [2021-04-15 05:38:31,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:31,340 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 260 transitions. [2021-04-15 05:38:31,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 05:38:31,341 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:31,341 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:31,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:31,555 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:31,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:31,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1145142685, now seen corresponding path program 10 times [2021-04-15 05:38:31,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:31,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306834938] [2021-04-15 05:38:31,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:31,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306834938] [2021-04-15 05:38:31,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363900919] [2021-04-15 05:38:31,582 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 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 [2021-04-15 05:38:31,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:38:31,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:31,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 05:38:31,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:31,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:31,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 05:38:31,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258789762] [2021-04-15 05:38:31,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 05:38:31,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:31,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 05:38:31,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-15 05:38:31,650 INFO L87 Difference]: Start difference. First operand 119 states and 260 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:31,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:31,704 INFO L93 Difference]: Finished difference Result 152 states and 307 transitions. [2021-04-15 05:38:31,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 05:38:31,704 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:38:31,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:31,705 INFO L225 Difference]: With dead ends: 152 [2021-04-15 05:38:31,705 INFO L226 Difference]: Without dead ends: 152 [2021-04-15 05:38:31,705 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:38:31,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-04-15 05:38:31,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 116. [2021-04-15 05:38:31,707 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) [2021-04-15 05:38:31,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 250 transitions. [2021-04-15 05:38:31,708 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 250 transitions. Word has length 17 [2021-04-15 05:38:31,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:31,708 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 250 transitions. [2021-04-15 05:38:31,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:31,708 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 250 transitions. [2021-04-15 05:38:31,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 05:38:31,708 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:31,708 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:31,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-04-15 05:38:31,923 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:31,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:31,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1839193251, now seen corresponding path program 11 times [2021-04-15 05:38:31,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:31,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510504117] [2021-04-15 05:38:31,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:31,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:31,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510504117] [2021-04-15 05:38:31,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305407422] [2021-04-15 05:38:31,948 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 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 [2021-04-15 05:38:31,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:38:31,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:31,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 05:38:31,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:32,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:32,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:32,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 05:38:32,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357649256] [2021-04-15 05:38:32,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 05:38:32,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:32,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 05:38:32,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-15 05:38:32,001 INFO L87 Difference]: Start difference. First operand 116 states and 250 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:32,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:32,049 INFO L93 Difference]: Finished difference Result 167 states and 329 transitions. [2021-04-15 05:38:32,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 05:38:32,050 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:38:32,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:32,051 INFO L225 Difference]: With dead ends: 167 [2021-04-15 05:38:32,051 INFO L226 Difference]: Without dead ends: 161 [2021-04-15 05:38:32,051 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:38:32,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-04-15 05:38:32,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 120. [2021-04-15 05:38:32,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1512605042016806) internal successors, (256), 119 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) [2021-04-15 05:38:32,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 256 transitions. [2021-04-15 05:38:32,054 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 256 transitions. Word has length 17 [2021-04-15 05:38:32,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:32,054 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 256 transitions. [2021-04-15 05:38:32,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:32,054 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 256 transitions. [2021-04-15 05:38:32,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 05:38:32,057 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:32,057 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:32,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-04-15 05:38:32,265 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:32,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:32,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1030416975, now seen corresponding path program 12 times [2021-04-15 05:38:32,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:32,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203420832] [2021-04-15 05:38:32,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:32,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203420832] [2021-04-15 05:38:32,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706975445] [2021-04-15 05:38:32,323 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:32,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:38:32,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:32,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:38:32,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:32,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:32,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2021-04-15 05:38:32,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546362066] [2021-04-15 05:38:32,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:38:32,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:32,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:38:32,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:38:32,405 INFO L87 Difference]: Start difference. First operand 120 states and 256 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:32,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:32,529 INFO L93 Difference]: Finished difference Result 303 states and 601 transitions. [2021-04-15 05:38:32,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 05:38:32,529 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:38:32,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:32,530 INFO L225 Difference]: With dead ends: 303 [2021-04-15 05:38:32,530 INFO L226 Difference]: Without dead ends: 296 [2021-04-15 05:38:32,531 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:38:32,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-04-15 05:38:32,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 151. [2021-04-15 05:38:32,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2533333333333334) internal successors, (338), 150 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:32,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 338 transitions. [2021-04-15 05:38:32,534 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 338 transitions. Word has length 19 [2021-04-15 05:38:32,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:32,534 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 338 transitions. [2021-04-15 05:38:32,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:32,535 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 338 transitions. [2021-04-15 05:38:32,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 05:38:32,535 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:32,535 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:32,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-04-15 05:38:32,743 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:32,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:32,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1048750001, now seen corresponding path program 13 times [2021-04-15 05:38:32,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:32,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568644539] [2021-04-15 05:38:32,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:32,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568644539] [2021-04-15 05:38:32,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037614519] [2021-04-15 05:38:32,837 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:38:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:32,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:38:32,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:38:32,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:32,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-04-15 05:38:32,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022083075] [2021-04-15 05:38:32,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 05:38:32,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:32,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 05:38:32,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:38:32,899 INFO L87 Difference]: Start difference. First operand 151 states and 338 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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) [2021-04-15 05:38:33,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:33,039 INFO L93 Difference]: Finished difference Result 285 states and 591 transitions. [2021-04-15 05:38:33,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 05:38:33,039 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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 19 [2021-04-15 05:38:33,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:33,041 INFO L225 Difference]: With dead ends: 285 [2021-04-15 05:38:33,041 INFO L226 Difference]: Without dead ends: 275 [2021-04-15 05:38:33,041 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:38:33,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-04-15 05:38:33,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 186. [2021-04-15 05:38:33,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.264864864864865) internal successors, (419), 185 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:33,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 419 transitions. [2021-04-15 05:38:33,045 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 419 transitions. Word has length 19 [2021-04-15 05:38:33,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:33,045 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 419 transitions. [2021-04-15 05:38:33,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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) [2021-04-15 05:38:33,045 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 419 transitions. [2021-04-15 05:38:33,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 05:38:33,046 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:33,046 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:33,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:33,261 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:33,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:33,261 INFO L82 PathProgramCache]: Analyzing trace with hash -588981681, now seen corresponding path program 14 times [2021-04-15 05:38:33,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:33,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177162289] [2021-04-15 05:38:33,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:33,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177162289] [2021-04-15 05:38:33,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638076392] [2021-04-15 05:38:33,307 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 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 [2021-04-15 05:38:33,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:38:33,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:33,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:38:33,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:38:33,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:33,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2021-04-15 05:38:33,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900403375] [2021-04-15 05:38:33,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:38:33,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:33,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:38:33,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:38:33,378 INFO L87 Difference]: Start difference. First operand 186 states and 419 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-04-15 05:38:33,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:33,525 INFO L93 Difference]: Finished difference Result 359 states and 743 transitions. [2021-04-15 05:38:33,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 05:38:33,525 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 [2021-04-15 05:38:33,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:33,527 INFO L225 Difference]: With dead ends: 359 [2021-04-15 05:38:33,527 INFO L226 Difference]: Without dead ends: 352 [2021-04-15 05:38:33,527 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:38:33,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-04-15 05:38:33,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 212. [2021-04-15 05:38:33,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.3175355450236967) internal successors, (489), 211 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:33,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 489 transitions. [2021-04-15 05:38:33,533 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 489 transitions. Word has length 19 [2021-04-15 05:38:33,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:33,533 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 489 transitions. [2021-04-15 05:38:33,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-04-15 05:38:33,533 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 489 transitions. [2021-04-15 05:38:33,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 05:38:33,533 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:33,533 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:33,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:33,750 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:33,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:33,750 INFO L82 PathProgramCache]: Analyzing trace with hash -617233839, now seen corresponding path program 15 times [2021-04-15 05:38:33,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:33,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418105546] [2021-04-15 05:38:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:33,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:33,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:33,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418105546] [2021-04-15 05:38:33,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077332244] [2021-04-15 05:38:33,782 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 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 [2021-04-15 05:38:33,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:38:33,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:33,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:38:33,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 05:38:33,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:33,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-04-15 05:38:33,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206367958] [2021-04-15 05:38:33,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:38:33,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:33,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:38:33,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:38:33,901 INFO L87 Difference]: Start difference. First operand 212 states and 489 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:34,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:34,201 INFO L93 Difference]: Finished difference Result 389 states and 854 transitions. [2021-04-15 05:38:34,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 05:38:34,201 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 05:38:34,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:34,202 INFO L225 Difference]: With dead ends: 389 [2021-04-15 05:38:34,202 INFO L226 Difference]: Without dead ends: 317 [2021-04-15 05:38:34,203 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 238.4ms TimeCoverageRelationStatistics Valid=232, Invalid=580, Unknown=0, NotChecked=0, Total=812 [2021-04-15 05:38:34,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-04-15 05:38:34,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 221. [2021-04-15 05:38:34,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.3181818181818183) internal successors, (510), 220 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) [2021-04-15 05:38:34,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 510 transitions. [2021-04-15 05:38:34,208 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 510 transitions. Word has length 21 [2021-04-15 05:38:34,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:34,208 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 510 transitions. [2021-04-15 05:38:34,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:34,208 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 510 transitions. [2021-04-15 05:38:34,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 05:38:34,208 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:34,208 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:34,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:34,421 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:34,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:34,421 INFO L82 PathProgramCache]: Analyzing trace with hash -380162493, now seen corresponding path program 16 times [2021-04-15 05:38:34,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:34,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787862122] [2021-04-15 05:38:34,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:34,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787862122] [2021-04-15 05:38:34,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865121679] [2021-04-15 05:38:34,447 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 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 [2021-04-15 05:38:34,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:38:34,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:34,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:38:34,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:34,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:34,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 05:38:34,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709642397] [2021-04-15 05:38:34,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 05:38:34,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:34,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 05:38:34,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 05:38:34,499 INFO L87 Difference]: Start difference. First operand 221 states and 510 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-04-15 05:38:34,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:34,546 INFO L93 Difference]: Finished difference Result 361 states and 777 transitions. [2021-04-15 05:38:34,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 05:38:34,547 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 21 [2021-04-15 05:38:34,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:34,549 INFO L225 Difference]: With dead ends: 361 [2021-04-15 05:38:34,549 INFO L226 Difference]: Without dead ends: 361 [2021-04-15 05:38:34,549 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:38:34,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-04-15 05:38:34,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 258. [2021-04-15 05:38:34,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.3463035019455254) internal successors, (603), 257 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:34,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 603 transitions. [2021-04-15 05:38:34,556 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 603 transitions. Word has length 21 [2021-04-15 05:38:34,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:34,556 INFO L480 AbstractCegarLoop]: Abstraction has 258 states and 603 transitions. [2021-04-15 05:38:34,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-04-15 05:38:34,556 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 603 transitions. [2021-04-15 05:38:34,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 05:38:34,557 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:34,557 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:34,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-04-15 05:38:34,772 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:34,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:34,773 INFO L82 PathProgramCache]: Analyzing trace with hash 492603451, now seen corresponding path program 17 times [2021-04-15 05:38:34,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:34,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619261465] [2021-04-15 05:38:34,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:34,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619261465] [2021-04-15 05:38:34,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507096847] [2021-04-15 05:38:34,794 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 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 [2021-04-15 05:38:34,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 05:38:34,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:34,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:38:34,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:34,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:34,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 05:38:34,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362940580] [2021-04-15 05:38:34,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 05:38:34,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:34,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 05:38:34,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 05:38:34,852 INFO L87 Difference]: Start difference. First operand 258 states and 603 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-04-15 05:38:34,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:34,897 INFO L93 Difference]: Finished difference Result 377 states and 812 transitions. [2021-04-15 05:38:34,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 05:38:34,898 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 21 [2021-04-15 05:38:34,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:34,899 INFO L225 Difference]: With dead ends: 377 [2021-04-15 05:38:34,899 INFO L226 Difference]: Without dead ends: 377 [2021-04-15 05:38:34,899 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:38:34,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-04-15 05:38:34,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 280. [2021-04-15 05:38:34,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.3405017921146953) internal successors, (653), 279 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:34,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 653 transitions. [2021-04-15 05:38:34,905 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 653 transitions. Word has length 21 [2021-04-15 05:38:34,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:34,905 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 653 transitions. [2021-04-15 05:38:34,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-04-15 05:38:34,905 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 653 transitions. [2021-04-15 05:38:34,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 05:38:34,906 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:34,906 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:35,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-04-15 05:38:35,121 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:35,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:35,121 INFO L82 PathProgramCache]: Analyzing trace with hash -2103486153, now seen corresponding path program 18 times [2021-04-15 05:38:35,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:35,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796317976] [2021-04-15 05:38:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:35,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796317976] [2021-04-15 05:38:35,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155023484] [2021-04-15 05:38:35,147 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:38:35,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 05:38:35,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:35,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:38:35,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:35,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:35,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 05:38:35,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460444157] [2021-04-15 05:38:35,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 05:38:35,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:35,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 05:38:35,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 05:38:35,216 INFO L87 Difference]: Start difference. First operand 280 states and 653 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-04-15 05:38:35,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:35,265 INFO L93 Difference]: Finished difference Result 352 states and 762 transitions. [2021-04-15 05:38:35,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 05:38:35,265 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 21 [2021-04-15 05:38:35,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:35,266 INFO L225 Difference]: With dead ends: 352 [2021-04-15 05:38:35,266 INFO L226 Difference]: Without dead ends: 348 [2021-04-15 05:38:35,267 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:38:35,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-04-15 05:38:35,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 244. [2021-04-15 05:38:35,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.325102880658436) internal successors, (565), 243 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:35,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 565 transitions. [2021-04-15 05:38:35,273 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 565 transitions. Word has length 21 [2021-04-15 05:38:35,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:35,273 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 565 transitions. [2021-04-15 05:38:35,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-04-15 05:38:35,273 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 565 transitions. [2021-04-15 05:38:35,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 05:38:35,274 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:35,274 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:35,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-04-15 05:38:35,483 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:35,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:35,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1685134877, now seen corresponding path program 19 times [2021-04-15 05:38:35,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:35,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536629333] [2021-04-15 05:38:35,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:35,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:35,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536629333] [2021-04-15 05:38:35,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940720356] [2021-04-15 05:38:35,505 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 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 [2021-04-15 05:38:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:35,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:38:35,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:35,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:35,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-04-15 05:38:35,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298969808] [2021-04-15 05:38:35,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 05:38:35,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:35,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 05:38:35,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-04-15 05:38:35,554 INFO L87 Difference]: Start difference. First operand 244 states and 565 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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) [2021-04-15 05:38:35,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:35,619 INFO L93 Difference]: Finished difference Result 304 states and 656 transitions. [2021-04-15 05:38:35,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 05:38:35,620 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 21 [2021-04-15 05:38:35,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:35,621 INFO L225 Difference]: With dead ends: 304 [2021-04-15 05:38:35,621 INFO L226 Difference]: Without dead ends: 298 [2021-04-15 05:38:35,621 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:38:35,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-04-15 05:38:35,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 246. [2021-04-15 05:38:35,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.3102040816326532) internal successors, (566), 245 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:35,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 566 transitions. [2021-04-15 05:38:35,625 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 566 transitions. Word has length 21 [2021-04-15 05:38:35,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:35,625 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 566 transitions. [2021-04-15 05:38:35,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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) [2021-04-15 05:38:35,626 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 566 transitions. [2021-04-15 05:38:35,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 05:38:35,626 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:35,626 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:35,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-04-15 05:38:35,841 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:35,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:35,842 INFO L82 PathProgramCache]: Analyzing trace with hash 540638335, now seen corresponding path program 20 times [2021-04-15 05:38:35,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:35,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686267437] [2021-04-15 05:38:35,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:35,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686267437] [2021-04-15 05:38:35,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116313713] [2021-04-15 05:38:35,863 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 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 [2021-04-15 05:38:35,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:38:35,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:35,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:38:35,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:35,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:35,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:35,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-04-15 05:38:35,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973082453] [2021-04-15 05:38:35,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 05:38:35,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:35,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 05:38:35,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-04-15 05:38:35,911 INFO L87 Difference]: Start difference. First operand 246 states and 566 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 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) [2021-04-15 05:38:35,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:35,970 INFO L93 Difference]: Finished difference Result 309 states and 671 transitions. [2021-04-15 05:38:35,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 05:38:35,970 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 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 21 [2021-04-15 05:38:35,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:35,971 INFO L225 Difference]: With dead ends: 309 [2021-04-15 05:38:35,971 INFO L226 Difference]: Without dead ends: 309 [2021-04-15 05:38:35,972 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:38:35,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-04-15 05:38:35,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 248. [2021-04-15 05:38:35,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.3076923076923075) internal successors, (570), 247 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:35,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 570 transitions. [2021-04-15 05:38:35,993 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 570 transitions. Word has length 21 [2021-04-15 05:38:35,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:35,993 INFO L480 AbstractCegarLoop]: Abstraction has 248 states and 570 transitions. [2021-04-15 05:38:35,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 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) [2021-04-15 05:38:35,993 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 570 transitions. [2021-04-15 05:38:35,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 05:38:35,993 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:35,993 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:36,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-04-15 05:38:36,194 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:36,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:36,194 INFO L82 PathProgramCache]: Analyzing trace with hash -51672517, now seen corresponding path program 21 times [2021-04-15 05:38:36,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:36,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666216212] [2021-04-15 05:38:36,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:36,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666216212] [2021-04-15 05:38:36,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986700114] [2021-04-15 05:38:36,213 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:38:36,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:38:36,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:36,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:38:36,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:36,307 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 05:38:36,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-04-15 05:38:36,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2021-04-15 05:38:36,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832864307] [2021-04-15 05:38:36,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 05:38:36,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:36,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 05:38:36,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:38:36,309 INFO L87 Difference]: Start difference. First operand 248 states and 570 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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) [2021-04-15 05:38:36,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:36,369 INFO L93 Difference]: Finished difference Result 382 states and 824 transitions. [2021-04-15 05:38:36,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 05:38:36,369 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 21 [2021-04-15 05:38:36,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:36,370 INFO L225 Difference]: With dead ends: 382 [2021-04-15 05:38:36,370 INFO L226 Difference]: Without dead ends: 232 [2021-04-15 05:38:36,370 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:38:36,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-04-15 05:38:36,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 175. [2021-04-15 05:38:36,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.7758620689655173) internal successors, (309), 174 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) [2021-04-15 05:38:36,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 309 transitions. [2021-04-15 05:38:36,375 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 309 transitions. Word has length 21 [2021-04-15 05:38:36,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:36,375 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 309 transitions. [2021-04-15 05:38:36,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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) [2021-04-15 05:38:36,375 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 309 transitions. [2021-04-15 05:38:36,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 05:38:36,376 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:36,376 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:36,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:36,590 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:36,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:36,590 INFO L82 PathProgramCache]: Analyzing trace with hash -2113872589, now seen corresponding path program 22 times [2021-04-15 05:38:36,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:36,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415113060] [2021-04-15 05:38:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:36,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415113060] [2021-04-15 05:38:36,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699154958] [2021-04-15 05:38:36,613 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 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 [2021-04-15 05:38:36,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:38:36,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:36,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:38:36,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:36,659 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:36,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:36,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-04-15 05:38:36,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908761492] [2021-04-15 05:38:36,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 05:38:36,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:36,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 05:38:36,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-04-15 05:38:36,661 INFO L87 Difference]: Start difference. First operand 175 states and 309 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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) [2021-04-15 05:38:36,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:36,716 INFO L93 Difference]: Finished difference Result 268 states and 454 transitions. [2021-04-15 05:38:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 05:38:36,716 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 21 [2021-04-15 05:38:36,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:36,717 INFO L225 Difference]: With dead ends: 268 [2021-04-15 05:38:36,717 INFO L226 Difference]: Without dead ends: 262 [2021-04-15 05:38:36,717 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:38:36,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-04-15 05:38:36,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 176. [2021-04-15 05:38:36,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.782857142857143) internal successors, (312), 175 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) [2021-04-15 05:38:36,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 312 transitions. [2021-04-15 05:38:36,720 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 312 transitions. Word has length 21 [2021-04-15 05:38:36,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:36,720 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 312 transitions. [2021-04-15 05:38:36,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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) [2021-04-15 05:38:36,721 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 312 transitions. [2021-04-15 05:38:36,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 05:38:36,721 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:36,721 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:36,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-04-15 05:38:36,936 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:36,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:36,937 INFO L82 PathProgramCache]: Analyzing trace with hash 913637529, now seen corresponding path program 23 times [2021-04-15 05:38:36,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:36,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853688841] [2021-04-15 05:38:36,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:36,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853688841] [2021-04-15 05:38:36,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099687881] [2021-04-15 05:38:36,986 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 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 [2021-04-15 05:38:36,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:38:36,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:36,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:38:37,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:37,023 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:37,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:37,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 05:38:37,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414750932] [2021-04-15 05:38:37,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 05:38:37,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:37,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 05:38:37,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-04-15 05:38:37,024 INFO L87 Difference]: Start difference. First operand 176 states and 312 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 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) [2021-04-15 05:38:37,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:37,095 INFO L93 Difference]: Finished difference Result 257 states and 435 transitions. [2021-04-15 05:38:37,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 05:38:37,095 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 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 21 [2021-04-15 05:38:37,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:37,096 INFO L225 Difference]: With dead ends: 257 [2021-04-15 05:38:37,096 INFO L226 Difference]: Without dead ends: 247 [2021-04-15 05:38:37,096 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:38:37,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-04-15 05:38:37,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 179. [2021-04-15 05:38:37,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.7640449438202248) internal successors, (314), 178 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:37,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 314 transitions. [2021-04-15 05:38:37,099 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 314 transitions. Word has length 21 [2021-04-15 05:38:37,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:37,099 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 314 transitions. [2021-04-15 05:38:37,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 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) [2021-04-15 05:38:37,099 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 314 transitions. [2021-04-15 05:38:37,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 05:38:37,099 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:37,099 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:37,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:37,314 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:37,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:37,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1408084783, now seen corresponding path program 24 times [2021-04-15 05:38:37,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:37,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027347432] [2021-04-15 05:38:37,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:37,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:37,333 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:37,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027347432] [2021-04-15 05:38:37,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310328464] [2021-04-15 05:38:37,333 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:38:37,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 05:38:37,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:37,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:38:37,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:37,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:37,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-04-15 05:38:37,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130230935] [2021-04-15 05:38:37,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 05:38:37,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:37,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 05:38:37,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-04-15 05:38:37,383 INFO L87 Difference]: Start difference. First operand 179 states and 314 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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) [2021-04-15 05:38:37,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:37,442 INFO L93 Difference]: Finished difference Result 248 states and 411 transitions. [2021-04-15 05:38:37,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 05:38:37,442 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 21 [2021-04-15 05:38:37,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:37,443 INFO L225 Difference]: With dead ends: 248 [2021-04-15 05:38:37,443 INFO L226 Difference]: Without dead ends: 239 [2021-04-15 05:38:37,444 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:38:37,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-04-15 05:38:37,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 191. [2021-04-15 05:38:37,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.7526315789473683) internal successors, (333), 190 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) [2021-04-15 05:38:37,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 333 transitions. [2021-04-15 05:38:37,447 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 333 transitions. Word has length 21 [2021-04-15 05:38:37,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:37,447 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 333 transitions. [2021-04-15 05:38:37,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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) [2021-04-15 05:38:37,447 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 333 transitions. [2021-04-15 05:38:37,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 05:38:37,448 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:37,448 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:37,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-04-15 05:38:37,660 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:37,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:37,660 INFO L82 PathProgramCache]: Analyzing trace with hash 791144921, now seen corresponding path program 25 times [2021-04-15 05:38:37,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:37,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963133647] [2021-04-15 05:38:37,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:37,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:37,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963133647] [2021-04-15 05:38:37,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81691468] [2021-04-15 05:38:37,677 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 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 [2021-04-15 05:38:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:37,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:38:37,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:37,738 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:37,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:37,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 05:38:37,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506786115] [2021-04-15 05:38:37,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 05:38:37,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:37,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 05:38:37,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 05:38:37,739 INFO L87 Difference]: Start difference. First operand 191 states and 333 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-04-15 05:38:37,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:37,785 INFO L93 Difference]: Finished difference Result 270 states and 458 transitions. [2021-04-15 05:38:37,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 05:38:37,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 21 [2021-04-15 05:38:37,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:37,786 INFO L225 Difference]: With dead ends: 270 [2021-04-15 05:38:37,786 INFO L226 Difference]: Without dead ends: 270 [2021-04-15 05:38:37,787 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:38:37,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-04-15 05:38:37,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 200. [2021-04-15 05:38:37,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.7688442211055277) internal successors, (352), 199 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:37,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 352 transitions. [2021-04-15 05:38:37,790 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 352 transitions. Word has length 21 [2021-04-15 05:38:37,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:37,790 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 352 transitions. [2021-04-15 05:38:37,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-04-15 05:38:37,790 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 352 transitions. [2021-04-15 05:38:37,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 05:38:37,791 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:37,791 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:38,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:38,005 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:38,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:38,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1493950229, now seen corresponding path program 26 times [2021-04-15 05:38:38,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:38,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051313655] [2021-04-15 05:38:38,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:38,021 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:38,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051313655] [2021-04-15 05:38:38,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844711583] [2021-04-15 05:38:38,021 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:38:38,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:38:38,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:38,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:38:38,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:38,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:38,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 05:38:38,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007477373] [2021-04-15 05:38:38,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 05:38:38,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:38,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 05:38:38,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 05:38:38,092 INFO L87 Difference]: Start difference. First operand 200 states and 352 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-04-15 05:38:38,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:38,145 INFO L93 Difference]: Finished difference Result 240 states and 405 transitions. [2021-04-15 05:38:38,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 05:38:38,145 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 21 [2021-04-15 05:38:38,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:38,146 INFO L225 Difference]: With dead ends: 240 [2021-04-15 05:38:38,146 INFO L226 Difference]: Without dead ends: 237 [2021-04-15 05:38:38,146 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:38:38,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-04-15 05:38:38,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 197. [2021-04-15 05:38:38,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.760204081632653) internal successors, (345), 196 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) [2021-04-15 05:38:38,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 345 transitions. [2021-04-15 05:38:38,149 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 345 transitions. Word has length 21 [2021-04-15 05:38:38,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:38,149 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 345 transitions. [2021-04-15 05:38:38,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-04-15 05:38:38,149 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 345 transitions. [2021-04-15 05:38:38,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 05:38:38,149 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:38,149 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:38,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-04-15 05:38:38,350 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:38,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:38,350 INFO L82 PathProgramCache]: Analyzing trace with hash 229022369, now seen corresponding path program 27 times [2021-04-15 05:38:38,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:38,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776217296] [2021-04-15 05:38:38,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:38,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776217296] [2021-04-15 05:38:38,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228387275] [2021-04-15 05:38:38,368 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:38,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:38:38,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:38,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:38:38,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 05:38:38,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-04-15 05:38:38,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2021-04-15 05:38:38,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282326087] [2021-04-15 05:38:38,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 05:38:38,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:38,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 05:38:38,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:38:38,448 INFO L87 Difference]: Start difference. First operand 197 states and 345 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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) [2021-04-15 05:38:38,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:38,477 INFO L93 Difference]: Finished difference Result 224 states and 389 transitions. [2021-04-15 05:38:38,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 05:38:38,477 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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 21 [2021-04-15 05:38:38,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:38,478 INFO L225 Difference]: With dead ends: 224 [2021-04-15 05:38:38,478 INFO L226 Difference]: Without dead ends: 199 [2021-04-15 05:38:38,479 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:38:38,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-04-15 05:38:38,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2021-04-15 05:38:38,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.7091836734693877) internal successors, (335), 196 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) [2021-04-15 05:38:38,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 335 transitions. [2021-04-15 05:38:38,482 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 335 transitions. Word has length 21 [2021-04-15 05:38:38,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:38,482 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 335 transitions. [2021-04-15 05:38:38,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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) [2021-04-15 05:38:38,482 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 335 transitions. [2021-04-15 05:38:38,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 05:38:38,483 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:38,483 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:38,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:38,699 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:38,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:38,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1365207641, now seen corresponding path program 28 times [2021-04-15 05:38:38,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:38,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961989694] [2021-04-15 05:38:38,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:38,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961989694] [2021-04-15 05:38:38,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841300229] [2021-04-15 05:38:38,722 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 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 [2021-04-15 05:38:38,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:38:38,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:38,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:38:38,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:38,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:38,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:38,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 05:38:38,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541541310] [2021-04-15 05:38:38,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 05:38:38,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:38,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 05:38:38,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 05:38:38,779 INFO L87 Difference]: Start difference. First operand 197 states and 335 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-04-15 05:38:38,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:38,819 INFO L93 Difference]: Finished difference Result 234 states and 383 transitions. [2021-04-15 05:38:38,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 05:38:38,819 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 21 [2021-04-15 05:38:38,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:38,820 INFO L225 Difference]: With dead ends: 234 [2021-04-15 05:38:38,820 INFO L226 Difference]: Without dead ends: 234 [2021-04-15 05:38:38,821 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:38:38,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-04-15 05:38:38,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 196. [2021-04-15 05:38:38,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.6974358974358974) internal successors, (331), 195 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) [2021-04-15 05:38:38,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 331 transitions. [2021-04-15 05:38:38,824 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 331 transitions. Word has length 21 [2021-04-15 05:38:38,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:38,824 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 331 transitions. [2021-04-15 05:38:38,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-04-15 05:38:38,824 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 331 transitions. [2021-04-15 05:38:38,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 05:38:38,825 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:38,825 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:39,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-04-15 05:38:39,037 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:39,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:39,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1990008773, now seen corresponding path program 29 times [2021-04-15 05:38:39,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:39,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419609400] [2021-04-15 05:38:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:39,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419609400] [2021-04-15 05:38:39,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912906422] [2021-04-15 05:38:39,094 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 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 [2021-04-15 05:38:39,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 05:38:39,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:39,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 05:38:39,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:39,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:39,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:39,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2021-04-15 05:38:39,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021692948] [2021-04-15 05:38:39,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:38:39,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:39,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:38:39,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:38:39,177 INFO L87 Difference]: Start difference. First operand 196 states and 331 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:39,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:39,351 INFO L93 Difference]: Finished difference Result 337 states and 533 transitions. [2021-04-15 05:38:39,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:38:39,352 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 05:38:39,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:39,352 INFO L225 Difference]: With dead ends: 337 [2021-04-15 05:38:39,353 INFO L226 Difference]: Without dead ends: 330 [2021-04-15 05:38:39,353 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 150.5ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:38:39,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-04-15 05:38:39,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 213. [2021-04-15 05:38:39,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.7075471698113207) internal successors, (362), 212 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:39,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 362 transitions. [2021-04-15 05:38:39,356 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 362 transitions. Word has length 23 [2021-04-15 05:38:39,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:39,356 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 362 transitions. [2021-04-15 05:38:39,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:39,357 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 362 transitions. [2021-04-15 05:38:39,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 05:38:39,357 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:39,357 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:39,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:39,571 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:39,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:39,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1910209031, now seen corresponding path program 30 times [2021-04-15 05:38:39,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:39,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751168356] [2021-04-15 05:38:39,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:39,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:39,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751168356] [2021-04-15 05:38:39,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086498906] [2021-04-15 05:38:39,636 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 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 [2021-04-15 05:38:39,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 05:38:39,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:39,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 05:38:39,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:38:39,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:39,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-04-15 05:38:39,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101064906] [2021-04-15 05:38:39,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:38:39,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:39,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:38:39,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:38:39,696 INFO L87 Difference]: Start difference. First operand 213 states and 362 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-04-15 05:38:39,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:39,876 INFO L93 Difference]: Finished difference Result 390 states and 642 transitions. [2021-04-15 05:38:39,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 05:38:39,876 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 23 [2021-04-15 05:38:39,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:39,877 INFO L225 Difference]: With dead ends: 390 [2021-04-15 05:38:39,877 INFO L226 Difference]: Without dead ends: 383 [2021-04-15 05:38:39,877 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:38:39,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-04-15 05:38:39,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 240. [2021-04-15 05:38:39,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.7447698744769875) internal successors, (417), 239 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:39,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 417 transitions. [2021-04-15 05:38:39,882 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 417 transitions. Word has length 23 [2021-04-15 05:38:39,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:39,882 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 417 transitions. [2021-04-15 05:38:39,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-04-15 05:38:39,882 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 417 transitions. [2021-04-15 05:38:39,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 05:38:39,882 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:39,882 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:40,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-04-15 05:38:40,097 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:40,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:40,097 INFO L82 PathProgramCache]: Analyzing trace with hash -89900555, now seen corresponding path program 31 times [2021-04-15 05:38:40,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:40,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715033097] [2021-04-15 05:38:40,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:40,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:40,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715033097] [2021-04-15 05:38:40,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267816581] [2021-04-15 05:38:40,144 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 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 [2021-04-15 05:38:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:40,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 05:38:40,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:38:40,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:40,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2021-04-15 05:38:40,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774330127] [2021-04-15 05:38:40,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:38:40,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:40,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:38:40,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:38:40,224 INFO L87 Difference]: Start difference. First operand 240 states and 417 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:40,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:40,387 INFO L93 Difference]: Finished difference Result 494 states and 827 transitions. [2021-04-15 05:38:40,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 05:38:40,387 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 05:38:40,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:40,389 INFO L225 Difference]: With dead ends: 494 [2021-04-15 05:38:40,389 INFO L226 Difference]: Without dead ends: 487 [2021-04-15 05:38:40,389 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:38:40,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-04-15 05:38:40,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 281. [2021-04-15 05:38:40,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.7535714285714286) internal successors, (491), 280 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:40,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 491 transitions. [2021-04-15 05:38:40,393 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 491 transitions. Word has length 23 [2021-04-15 05:38:40,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:40,394 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 491 transitions. [2021-04-15 05:38:40,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:40,394 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 491 transitions. [2021-04-15 05:38:40,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 05:38:40,394 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:40,394 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:40,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-04-15 05:38:40,609 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:40,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:40,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1174855409, now seen corresponding path program 32 times [2021-04-15 05:38:40,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:40,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602347059] [2021-04-15 05:38:40,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:40,663 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:40,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602347059] [2021-04-15 05:38:40,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828693943] [2021-04-15 05:38:40,663 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:40,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:38:40,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:40,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 05:38:40,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:38:40,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:40,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2021-04-15 05:38:40,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715599195] [2021-04-15 05:38:40,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:38:40,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:40,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:38:40,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:38:40,743 INFO L87 Difference]: Start difference. First operand 281 states and 491 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:40,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:40,946 INFO L93 Difference]: Finished difference Result 505 states and 846 transitions. [2021-04-15 05:38:40,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:38:40,946 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 05:38:40,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:40,947 INFO L225 Difference]: With dead ends: 505 [2021-04-15 05:38:40,947 INFO L226 Difference]: Without dead ends: 498 [2021-04-15 05:38:40,948 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:38:40,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-04-15 05:38:40,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 339. [2021-04-15 05:38:40,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.7396449704142012) internal successors, (588), 338 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:40,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 588 transitions. [2021-04-15 05:38:40,952 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 588 transitions. Word has length 23 [2021-04-15 05:38:40,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:40,953 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 588 transitions. [2021-04-15 05:38:40,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:40,953 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 588 transitions. [2021-04-15 05:38:40,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 05:38:40,953 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:40,953 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:41,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-04-15 05:38:41,163 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:41,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:41,163 INFO L82 PathProgramCache]: Analyzing trace with hash -508289285, now seen corresponding path program 33 times [2021-04-15 05:38:41,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:41,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848877360] [2021-04-15 05:38:41,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:41,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848877360] [2021-04-15 05:38:41,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785526115] [2021-04-15 05:38:41,199 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 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 [2021-04-15 05:38:41,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:38:41,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:41,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:38:41,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-04-15 05:38:41,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:41,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-04-15 05:38:41,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752289415] [2021-04-15 05:38:41,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:38:41,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:41,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:38:41,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:38:41,304 INFO L87 Difference]: Start difference. First operand 339 states and 588 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:41,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:41,568 INFO L93 Difference]: Finished difference Result 383 states and 645 transitions. [2021-04-15 05:38:41,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 05:38:41,568 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 05:38:41,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:41,569 INFO L225 Difference]: With dead ends: 383 [2021-04-15 05:38:41,569 INFO L226 Difference]: Without dead ends: 249 [2021-04-15 05:38:41,570 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 224.5ms TimeCoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2021-04-15 05:38:41,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-04-15 05:38:41,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2021-04-15 05:38:41,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.7298387096774193) internal successors, (429), 248 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) [2021-04-15 05:38:41,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 429 transitions. [2021-04-15 05:38:41,573 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 429 transitions. Word has length 25 [2021-04-15 05:38:41,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:41,573 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 429 transitions. [2021-04-15 05:38:41,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:41,573 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 429 transitions. [2021-04-15 05:38:41,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 05:38:41,573 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:41,573 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:41,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-04-15 05:38:41,781 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:41,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:41,781 INFO L82 PathProgramCache]: Analyzing trace with hash -2072797355, now seen corresponding path program 34 times [2021-04-15 05:38:41,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:41,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139692825] [2021-04-15 05:38:41,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:41,815 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:41,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139692825] [2021-04-15 05:38:41,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100940430] [2021-04-15 05:38:41,815 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 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 [2021-04-15 05:38:41,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:38:41,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:41,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:38:41,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:41,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:41,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 05:38:41,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287841641] [2021-04-15 05:38:41,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 05:38:41,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:41,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 05:38:41,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:38:41,867 INFO L87 Difference]: Start difference. First operand 249 states and 429 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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) [2021-04-15 05:38:41,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:41,945 INFO L93 Difference]: Finished difference Result 352 states and 595 transitions. [2021-04-15 05:38:41,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 05:38:41,945 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 25 [2021-04-15 05:38:41,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:41,946 INFO L225 Difference]: With dead ends: 352 [2021-04-15 05:38:41,946 INFO L226 Difference]: Without dead ends: 352 [2021-04-15 05:38:41,946 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:38:41,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-04-15 05:38:41,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 234. [2021-04-15 05:38:41,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.7124463519313304) internal successors, (399), 233 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:41,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 399 transitions. [2021-04-15 05:38:41,950 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 399 transitions. Word has length 25 [2021-04-15 05:38:41,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:41,950 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 399 transitions. [2021-04-15 05:38:41,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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) [2021-04-15 05:38:41,950 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 399 transitions. [2021-04-15 05:38:41,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 05:38:41,950 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:41,950 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:42,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-04-15 05:38:42,166 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:42,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:42,166 INFO L82 PathProgramCache]: Analyzing trace with hash -2069719407, now seen corresponding path program 35 times [2021-04-15 05:38:42,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:42,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728648069] [2021-04-15 05:38:42,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:42,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:42,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728648069] [2021-04-15 05:38:42,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826858756] [2021-04-15 05:38:42,196 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 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 [2021-04-15 05:38:42,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 05:38:42,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:42,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:38:42,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:42,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:42,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 05:38:42,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617862411] [2021-04-15 05:38:42,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 05:38:42,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:42,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 05:38:42,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:38:42,263 INFO L87 Difference]: Start difference. First operand 234 states and 399 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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) [2021-04-15 05:38:42,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:42,341 INFO L93 Difference]: Finished difference Result 338 states and 551 transitions. [2021-04-15 05:38:42,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 05:38:42,342 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 25 [2021-04-15 05:38:42,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:42,343 INFO L225 Difference]: With dead ends: 338 [2021-04-15 05:38:42,343 INFO L226 Difference]: Without dead ends: 323 [2021-04-15 05:38:42,343 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:38:42,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-04-15 05:38:42,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 241. [2021-04-15 05:38:42,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.7041666666666666) internal successors, (409), 240 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:42,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 409 transitions. [2021-04-15 05:38:42,346 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 409 transitions. Word has length 25 [2021-04-15 05:38:42,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:42,346 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 409 transitions. [2021-04-15 05:38:42,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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) [2021-04-15 05:38:42,346 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 409 transitions. [2021-04-15 05:38:42,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 05:38:42,347 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:42,347 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:42,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-04-15 05:38:42,561 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:42,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:42,561 INFO L82 PathProgramCache]: Analyzing trace with hash 417917337, now seen corresponding path program 36 times [2021-04-15 05:38:42,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:42,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351544956] [2021-04-15 05:38:42,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:42,587 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:42,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351544956] [2021-04-15 05:38:42,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033024414] [2021-04-15 05:38:42,588 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 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 [2021-04-15 05:38:42,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 05:38:42,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:42,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:38:42,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:42,649 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:42,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:42,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 05:38:42,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324735218] [2021-04-15 05:38:42,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 05:38:42,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:42,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 05:38:42,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-04-15 05:38:42,650 INFO L87 Difference]: Start difference. First operand 241 states and 409 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-04-15 05:38:42,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:42,714 INFO L93 Difference]: Finished difference Result 346 states and 575 transitions. [2021-04-15 05:38:42,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 05:38:42,715 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-04-15 05:38:42,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:42,716 INFO L225 Difference]: With dead ends: 346 [2021-04-15 05:38:42,716 INFO L226 Difference]: Without dead ends: 346 [2021-04-15 05:38:42,716 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:38:42,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-04-15 05:38:42,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 234. [2021-04-15 05:38:42,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.6866952789699572) internal successors, (393), 233 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:42,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 393 transitions. [2021-04-15 05:38:42,719 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 393 transitions. Word has length 25 [2021-04-15 05:38:42,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:42,719 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 393 transitions. [2021-04-15 05:38:42,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-04-15 05:38:42,720 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 393 transitions. [2021-04-15 05:38:42,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 05:38:42,720 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:42,720 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:42,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-04-15 05:38:42,935 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:42,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:42,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1503952853, now seen corresponding path program 37 times [2021-04-15 05:38:42,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:42,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985982464] [2021-04-15 05:38:42,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:42,957 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:42,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985982464] [2021-04-15 05:38:42,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545726523] [2021-04-15 05:38:42,957 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:38:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:42,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:38:42,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:43,013 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:43,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:43,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 05:38:43,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957738218] [2021-04-15 05:38:43,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 05:38:43,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:43,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 05:38:43,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-04-15 05:38:43,014 INFO L87 Difference]: Start difference. First operand 234 states and 393 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-04-15 05:38:43,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:43,074 INFO L93 Difference]: Finished difference Result 281 states and 454 transitions. [2021-04-15 05:38:43,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 05:38:43,075 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-04-15 05:38:43,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:43,076 INFO L225 Difference]: With dead ends: 281 [2021-04-15 05:38:43,076 INFO L226 Difference]: Without dead ends: 272 [2021-04-15 05:38:43,076 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:38:43,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-04-15 05:38:43,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 225. [2021-04-15 05:38:43,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.6741071428571428) internal successors, (375), 224 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:43,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 375 transitions. [2021-04-15 05:38:43,079 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 375 transitions. Word has length 25 [2021-04-15 05:38:43,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:43,079 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 375 transitions. [2021-04-15 05:38:43,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-04-15 05:38:43,079 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 375 transitions. [2021-04-15 05:38:43,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 05:38:43,079 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:43,079 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:43,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:43,286 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:43,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:43,286 INFO L82 PathProgramCache]: Analyzing trace with hash -2087332515, now seen corresponding path program 38 times [2021-04-15 05:38:43,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:43,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775292314] [2021-04-15 05:38:43,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:43,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775292314] [2021-04-15 05:38:43,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521895423] [2021-04-15 05:38:43,307 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 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 [2021-04-15 05:38:43,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:38:43,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:43,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:38:43,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:38:43,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:43,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-04-15 05:38:43,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187071343] [2021-04-15 05:38:43,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 05:38:43,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:43,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 05:38:43,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 05:38:43,358 INFO L87 Difference]: Start difference. First operand 225 states and 375 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-04-15 05:38:43,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:43,414 INFO L93 Difference]: Finished difference Result 262 states and 421 transitions. [2021-04-15 05:38:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 05:38:43,414 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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 25 [2021-04-15 05:38:43,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:43,415 INFO L225 Difference]: With dead ends: 262 [2021-04-15 05:38:43,415 INFO L226 Difference]: Without dead ends: 262 [2021-04-15 05:38:43,416 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:38:43,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-04-15 05:38:43,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 204. [2021-04-15 05:38:43,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.6600985221674878) internal successors, (337), 203 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) [2021-04-15 05:38:43,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 337 transitions. [2021-04-15 05:38:43,419 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 337 transitions. Word has length 25 [2021-04-15 05:38:43,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:43,420 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 337 transitions. [2021-04-15 05:38:43,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-04-15 05:38:43,420 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 337 transitions. [2021-04-15 05:38:43,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 05:38:43,421 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:43,421 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:43,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:43,633 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:43,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:43,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1140061405, now seen corresponding path program 39 times [2021-04-15 05:38:43,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:43,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209780673] [2021-04-15 05:38:43,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:43,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209780673] [2021-04-15 05:38:43,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597253414] [2021-04-15 05:38:43,654 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 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 [2021-04-15 05:38:43,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:38:43,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:43,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:38:43,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-04-15 05:38:43,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-04-15 05:38:43,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2021-04-15 05:38:43,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116114545] [2021-04-15 05:38:43,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 05:38:43,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:43,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 05:38:43,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:38:43,734 INFO L87 Difference]: Start difference. First operand 204 states and 337 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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) [2021-04-15 05:38:43,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:43,775 INFO L93 Difference]: Finished difference Result 211 states and 345 transitions. [2021-04-15 05:38:43,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 05:38:43,775 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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 25 [2021-04-15 05:38:43,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:43,775 INFO L225 Difference]: With dead ends: 211 [2021-04-15 05:38:43,775 INFO L226 Difference]: Without dead ends: 39 [2021-04-15 05:38:43,776 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:38:43,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-04-15 05:38:43,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-04-15 05:38:43,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:43,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 50 transitions. [2021-04-15 05:38:43,776 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 50 transitions. Word has length 25 [2021-04-15 05:38:43,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:43,776 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 50 transitions. [2021-04-15 05:38:43,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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) [2021-04-15 05:38:43,777 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 50 transitions. [2021-04-15 05:38:43,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 05:38:43,777 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:43,777 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:43,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:43,992 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:43,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:43,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1938530999, now seen corresponding path program 40 times [2021-04-15 05:38:43,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:43,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414760874] [2021-04-15 05:38:43,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:44,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414760874] [2021-04-15 05:38:44,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406851282] [2021-04-15 05:38:44,042 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 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 [2021-04-15 05:38:44,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:38:44,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:44,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:38:44,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:44,089 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:44,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:44,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 05:38:44,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788138508] [2021-04-15 05:38:44,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:38:44,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:44,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:38:44,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:38:44,090 INFO L87 Difference]: Start difference. First operand 37 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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) [2021-04-15 05:38:44,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:44,134 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2021-04-15 05:38:44,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 05:38:44,134 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 25 [2021-04-15 05:38:44,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:44,135 INFO L225 Difference]: With dead ends: 54 [2021-04-15 05:38:44,135 INFO L226 Difference]: Without dead ends: 40 [2021-04-15 05:38:44,135 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:38:44,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-04-15 05:38:44,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-04-15 05:38:44,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:44,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2021-04-15 05:38:44,136 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 25 [2021-04-15 05:38:44,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:44,136 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2021-04-15 05:38:44,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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) [2021-04-15 05:38:44,136 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2021-04-15 05:38:44,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-04-15 05:38:44,136 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:44,136 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:44,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-04-15 05:38:44,345 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:44,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:44,345 INFO L82 PathProgramCache]: Analyzing trace with hash 979739577, now seen corresponding path program 41 times [2021-04-15 05:38:44,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:44,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550226115] [2021-04-15 05:38:44,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:44,409 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:44,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550226115] [2021-04-15 05:38:44,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019874145] [2021-04-15 05:38:44,409 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 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 [2021-04-15 05:38:44,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 05:38:44,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:44,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 05:38:44,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:44,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:38:44,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2021-04-15 05:38:44,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181202274] [2021-04-15 05:38:44,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:38:44,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:44,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:38:44,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:38:44,505 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:44,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:44,658 INFO L93 Difference]: Finished difference Result 75 states and 107 transitions. [2021-04-15 05:38:44,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 05:38:44,658 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-04-15 05:38:44,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:44,658 INFO L225 Difference]: With dead ends: 75 [2021-04-15 05:38:44,658 INFO L226 Difference]: Without dead ends: 68 [2021-04-15 05:38:44,658 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 176.5ms TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:38:44,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-04-15 05:38:44,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2021-04-15 05:38:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:44,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2021-04-15 05:38:44,659 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 27 [2021-04-15 05:38:44,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:44,659 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2021-04-15 05:38:44,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:44,659 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2021-04-15 05:38:44,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-15 05:38:44,660 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:38:44,660 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:38:44,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:44,865 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:38:44,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:38:44,865 INFO L82 PathProgramCache]: Analyzing trace with hash -291209033, now seen corresponding path program 42 times [2021-04-15 05:38:44,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:38:44,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876599725] [2021-04-15 05:38:44,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:38:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:38:44,927 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:38:44,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876599725] [2021-04-15 05:38:44,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762593801] [2021-04-15 05:38:44,928 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 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 [2021-04-15 05:38:44,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 05:38:44,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:38:44,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:38:44,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:38:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-04-15 05:38:45,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-04-15 05:38:45,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 18 [2021-04-15 05:38:45,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683018369] [2021-04-15 05:38:45,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 05:38:45,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:38:45,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 05:38:45,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:38:45,031 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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) [2021-04-15 05:38:45,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:38:45,045 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2021-04-15 05:38:45,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 05:38:45,045 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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 29 [2021-04-15 05:38:45,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:38:45,045 INFO L225 Difference]: With dead ends: 41 [2021-04-15 05:38:45,045 INFO L226 Difference]: Without dead ends: 0 [2021-04-15 05:38:45,045 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:38:45,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-04-15 05:38:45,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-04-15 05:38:45,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:38:45,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-04-15 05:38:45,046 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2021-04-15 05:38:45,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:38:45,046 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-04-15 05:38:45,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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) [2021-04-15 05:38:45,046 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-04-15 05:38:45,046 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-04-15 05:38:45,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:38:45,257 INFO L202 PluginConnector]: Adding new model easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 05:38:45 BasicIcfg [2021-04-15 05:38:45,257 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 05:38:45,257 INFO L168 Benchmark]: Toolchain (without parser) took 17974.57 ms. Allocated memory was 255.9 MB in the beginning and 423.6 MB in the end (delta: 167.8 MB). Free memory was 236.8 MB in the beginning and 179.9 MB in the end (delta: 56.9 MB). Peak memory consumption was 223.7 MB. Max. memory is 16.0 GB. [2021-04-15 05:38:45,257 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 05:38:45,258 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.17 ms. Allocated memory is still 255.9 MB. Free memory was 236.8 MB in the beginning and 235.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 05:38:45,258 INFO L168 Benchmark]: Boogie Preprocessor took 10.37 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 234.3 MB in the end (delta: 986.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 05:38:45,258 INFO L168 Benchmark]: RCFGBuilder took 138.52 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 225.4 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-04-15 05:38:45,258 INFO L168 Benchmark]: TraceAbstraction took 17793.31 ms. Allocated memory was 255.9 MB in the beginning and 423.6 MB in the end (delta: 167.8 MB). Free memory was 241.5 MB in the beginning and 179.9 MB in the end (delta: 61.6 MB). Peak memory consumption was 227.9 MB. Max. memory is 16.0 GB. [2021-04-15 05:38:45,258 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 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.17 ms. Allocated memory is still 255.9 MB. Free memory was 236.8 MB in the beginning and 235.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.37 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 234.3 MB in the end (delta: 986.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 138.52 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 225.4 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 17793.31 ms. Allocated memory was 255.9 MB in the beginning and 423.6 MB in the end (delta: 167.8 MB). Free memory was 241.5 MB in the beginning and 179.9 MB in the end (delta: 61.6 MB). Peak memory consumption was 227.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 37]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 17738.0ms, OverallIterations: 47, TraceHistogramMax: 5, EmptinessCheckTime: 29.3ms, AutomataDifference: 3779.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 828 SDtfs, 2654 SDslu, 2656 SDs, 0 SdLazy, 3938 SolverSat, 653 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1639.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1381 GetRequests, 880 SyntacticMatches, 29 SemanticMatches, 472 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 2651.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=339occurred in iteration=37, InterpolantAutomatonStates: 496, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 232.4ms AutomataMinimizationTime, 47 MinimizatonAttempts, 2877 StatesRemovedByMinimization, 45 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 79.1ms SsaConstructionTime, 294.3ms SatisfiabilityAnalysisTime, 3501.4ms InterpolantComputationTime, 1840 NumberOfCodeBlocks, 1814 NumberOfCodeBlocksAsserted, 173 NumberOfCheckSat, 1750 ConstructedInterpolants, 0 QuantifiedInterpolants, 7124 SizeOfPredicates, 59 NumberOfNonLiveVariables, 1583 ConjunctsInSsa, 347 ConjunctsInUnsatCore, 90 InterpolantComputations, 9 PerfectInterpolantSequences, 584/1205 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 proved your program to be correct! Received shutdown request...