/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/popl20/figure1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 22:45:16,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 22:45:16,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 22:45:16,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 22:45:16,262 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 [2021-03-10 22:45:16,293 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 22:45:16,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 22:45:16,293 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 22:45:16,294 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 22:45:16,296 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 22:45:16,296 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 22:45:16,296 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 22:45:16,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 22:45:16,296 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 22:45:16,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 22:45:16,297 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 22:45:16,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 22:45:16,297 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 22:45:16,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 22:45:16,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 22:45:16,297 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 22:45:16,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 22:45:16,297 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 22:45:16,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 22:45:16,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 22:45:16,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 22:45:16,298 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 22:45:16,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 22:45:16,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 22:45:16,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 22:45:16,298 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 22:45:16,298 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 22:45:16,298 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 22:45:16,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 22:45:16,299 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 22:45:16,299 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 22:45:16,299 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 22:45:16,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 22:45:16,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 22:45:16,552 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 22:45:16,553 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 22:45:16,553 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 22:45:16,554 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1.wvr.bpl [2021-03-10 22:45:16,554 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1.wvr.bpl' [2021-03-10 22:45:16,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 22:45:16,586 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 22:45:16,587 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 22:45:16,587 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 22:45:16,587 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 22:45:16,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:45:16" (1/1) ... [2021-03-10 22:45:16,602 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:45:16" (1/1) ... [2021-03-10 22:45:16,607 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 22:45:16,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 22:45:16,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 22:45:16,611 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 22:45:16,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:45:16" (1/1) ... [2021-03-10 22:45:16,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:45:16" (1/1) ... [2021-03-10 22:45:16,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:45:16" (1/1) ... [2021-03-10 22:45:16,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:45:16" (1/1) ... [2021-03-10 22:45:16,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:45:16" (1/1) ... [2021-03-10 22:45:16,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:45:16" (1/1) ... [2021-03-10 22:45:16,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:45:16" (1/1) ... [2021-03-10 22:45:16,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 22:45:16,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 22:45:16,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 22:45:16,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 22:45:16,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:45:16" (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 [2021-03-10 22:45:16,669 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 22:45:16,669 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 22:45:16,669 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 22:45:16,669 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 22:45:16,669 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 22:45:16,669 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 22:45:16,669 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 22:45:16,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 22:45:16,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 22:45:16,670 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 22:45:16,850 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 22:45:16,850 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 22:45:16,851 INFO L202 PluginConnector]: Adding new model figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:45:16 BoogieIcfgContainer [2021-03-10 22:45:16,851 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 22:45:16,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 22:45:16,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 22:45:16,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 22:45:16,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:45:16" (1/2) ... [2021-03-10 22:45:16,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce1bf40 and model type figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 10:45:16, skipping insertion in model container [2021-03-10 22:45:16,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:45:16" (2/2) ... [2021-03-10 22:45:16,866 INFO L111 eAbstractionObserver]: Analyzing ICFG figure1.wvr.bpl [2021-03-10 22:45:16,870 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 22:45:16,870 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 22:45:16,872 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 22:45:16,873 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 22:45:16,890 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-10 22:45:16,901 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 22:45:16,912 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 22:45:16,912 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 22:45:16,912 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 22:45:16,912 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 22:45:16,912 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 22:45:16,913 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 22:45:16,913 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 22:45:16,913 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 22:45:16,918 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2021-03-10 22:45:16,925 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) [2021-03-10 22:45:16,926 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) [2021-03-10 22:45:16,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 22:45:16,936 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:16,936 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:16,936 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:16,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:16,940 INFO L82 PathProgramCache]: Analyzing trace with hash -155133599, now seen corresponding path program 1 times [2021-03-10 22:45:16,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:16,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49836543] [2021-03-10 22:45:16,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:17,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49836543] [2021-03-10 22:45:17,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:45:17,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:45:17,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100752818] [2021-03-10 22:45:17,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 22:45:17,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:17,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 22:45:17,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:45:17,069 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:17,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:17,094 INFO L93 Difference]: Finished difference Result 57 states and 100 transitions. [2021-03-10 22:45:17,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 22:45:17,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 22:45:17,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:17,103 INFO L225 Difference]: With dead ends: 57 [2021-03-10 22:45:17,103 INFO L226 Difference]: Without dead ends: 42 [2021-03-10 22:45:17,104 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:45:17,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-03-10 22:45:17,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-03-10 22:45:17,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 39 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) [2021-03-10 22:45:17,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 71 transitions. [2021-03-10 22:45:17,135 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 71 transitions. Word has length 14 [2021-03-10 22:45:17,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:17,135 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 71 transitions. [2021-03-10 22:45:17,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:17,135 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 71 transitions. [2021-03-10 22:45:17,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:45:17,137 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:17,137 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:17,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 22:45:17,137 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:17,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:17,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1800134561, now seen corresponding path program 1 times [2021-03-10 22:45:17,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:17,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846139390] [2021-03-10 22:45:17,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:17,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:17,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846139390] [2021-03-10 22:45:17,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854542919] [2021-03-10 22:45:17,252 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 [2021-03-10 22:45:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:17,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 22:45:17,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:17,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:17,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-03-10 22:45:17,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504898035] [2021-03-10 22:45:17,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:45:17,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:17,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:45:17,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:45:17,429 INFO L87 Difference]: Start difference. First operand 40 states and 71 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 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) [2021-03-10 22:45:17,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:17,598 INFO L93 Difference]: Finished difference Result 63 states and 108 transitions. [2021-03-10 22:45:17,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:45:17,599 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 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 16 [2021-03-10 22:45:17,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:17,599 INFO L225 Difference]: With dead ends: 63 [2021-03-10 22:45:17,599 INFO L226 Difference]: Without dead ends: 63 [2021-03-10 22:45:17,600 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 183.9ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:45:17,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-03-10 22:45:17,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2021-03-10 22:45:17,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:17,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 80 transitions. [2021-03-10 22:45:17,604 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 80 transitions. Word has length 16 [2021-03-10 22:45:17,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:17,605 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 80 transitions. [2021-03-10 22:45:17,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 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) [2021-03-10 22:45:17,605 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 80 transitions. [2021-03-10 22:45:17,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:45:17,605 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:17,605 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:17,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-03-10 22:45:17,821 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:17,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:17,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1152959347, now seen corresponding path program 2 times [2021-03-10 22:45:17,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:17,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340679956] [2021-03-10 22:45:17,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:17,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340679956] [2021-03-10 22:45:17,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:45:17,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:45:17,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030391184] [2021-03-10 22:45:17,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:45:17,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:17,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:45:17,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:45:17,863 INFO L87 Difference]: Start difference. First operand 45 states and 80 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:17,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:17,932 INFO L93 Difference]: Finished difference Result 50 states and 88 transitions. [2021-03-10 22:45:17,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:45:17,933 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:45:17,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:17,936 INFO L225 Difference]: With dead ends: 50 [2021-03-10 22:45:17,940 INFO L226 Difference]: Without dead ends: 48 [2021-03-10 22:45:17,940 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:45:17,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-03-10 22:45:17,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2021-03-10 22:45:17,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 42 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) [2021-03-10 22:45:17,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 76 transitions. [2021-03-10 22:45:17,946 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 76 transitions. Word has length 16 [2021-03-10 22:45:17,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:17,946 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 76 transitions. [2021-03-10 22:45:17,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:17,946 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 76 transitions. [2021-03-10 22:45:17,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:45:17,947 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:17,947 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:17,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 22:45:17,947 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:17,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:17,948 INFO L82 PathProgramCache]: Analyzing trace with hash 19790621, now seen corresponding path program 1 times [2021-03-10 22:45:17,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:17,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476187676] [2021-03-10 22:45:17,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:18,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:18,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476187676] [2021-03-10 22:45:18,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541020692] [2021-03-10 22:45:18,010 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 [2021-03-10 22:45:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:18,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:45:18,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:18,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:18,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-03-10 22:45:18,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638526086] [2021-03-10 22:45:18,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:45:18,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:18,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:45:18,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:45:18,132 INFO L87 Difference]: Start difference. First operand 43 states and 76 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:18,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:18,144 INFO L93 Difference]: Finished difference Result 96 states and 173 transitions. [2021-03-10 22:45:18,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 22:45:18,144 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:45:18,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:18,145 INFO L225 Difference]: With dead ends: 96 [2021-03-10 22:45:18,145 INFO L226 Difference]: Without dead ends: 75 [2021-03-10 22:45:18,145 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:45:18,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-03-10 22:45:18,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2021-03-10 22:45:18,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:18,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 109 transitions. [2021-03-10 22:45:18,149 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 109 transitions. Word has length 18 [2021-03-10 22:45:18,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:18,149 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 109 transitions. [2021-03-10 22:45:18,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:18,149 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 109 transitions. [2021-03-10 22:45:18,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:45:18,150 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:18,150 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:18,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:45:18,356 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:18,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:18,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1443468059, now seen corresponding path program 2 times [2021-03-10 22:45:18,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:18,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90236143] [2021-03-10 22:45:18,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:18,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90236143] [2021-03-10 22:45:18,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938942854] [2021-03-10 22:45:18,415 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 [2021-03-10 22:45:18,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:45:18,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:18,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 22:45:18,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:18,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:18,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-03-10 22:45:18,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581956064] [2021-03-10 22:45:18,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:45:18,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:18,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:45:18,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:45:18,569 INFO L87 Difference]: Start difference. First operand 58 states and 109 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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) [2021-03-10 22:45:18,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:18,825 INFO L93 Difference]: Finished difference Result 173 states and 308 transitions. [2021-03-10 22:45:18,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:45:18,826 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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 20 [2021-03-10 22:45:18,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:18,827 INFO L225 Difference]: With dead ends: 173 [2021-03-10 22:45:18,827 INFO L226 Difference]: Without dead ends: 167 [2021-03-10 22:45:18,828 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 227.3ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:45:18,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-03-10 22:45:18,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 67. [2021-03-10 22:45:18,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:18,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 129 transitions. [2021-03-10 22:45:18,838 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 129 transitions. Word has length 20 [2021-03-10 22:45:18,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:18,839 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 129 transitions. [2021-03-10 22:45:18,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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) [2021-03-10 22:45:18,839 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 129 transitions. [2021-03-10 22:45:18,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:45:18,839 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:18,839 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:19,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:45:19,052 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:19,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:19,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1693280397, now seen corresponding path program 3 times [2021-03-10 22:45:19,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:19,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634120875] [2021-03-10 22:45:19,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:19,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:19,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634120875] [2021-03-10 22:45:19,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533478315] [2021-03-10 22:45:19,096 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 [2021-03-10 22:45:19,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:45:19,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:19,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 22:45:19,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:19,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:19,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:19,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-03-10 22:45:19,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479197378] [2021-03-10 22:45:19,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:45:19,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:19,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:45:19,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:45:19,235 INFO L87 Difference]: Start difference. First operand 67 states and 129 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:19,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:19,454 INFO L93 Difference]: Finished difference Result 145 states and 267 transitions. [2021-03-10 22:45:19,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:45:19,455 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:45:19,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:19,455 INFO L225 Difference]: With dead ends: 145 [2021-03-10 22:45:19,455 INFO L226 Difference]: Without dead ends: 141 [2021-03-10 22:45:19,456 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 196.7ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:45:19,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-03-10 22:45:19,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 66. [2021-03-10 22:45:19,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 65 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:19,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 126 transitions. [2021-03-10 22:45:19,459 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 126 transitions. Word has length 20 [2021-03-10 22:45:19,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:19,459 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 126 transitions. [2021-03-10 22:45:19,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:19,459 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 126 transitions. [2021-03-10 22:45:19,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:45:19,460 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:19,460 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:19,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:45:19,675 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:19,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:19,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1024348455, now seen corresponding path program 4 times [2021-03-10 22:45:19,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:19,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819334978] [2021-03-10 22:45:19,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:19,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819334978] [2021-03-10 22:45:19,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135572631] [2021-03-10 22:45:19,741 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 [2021-03-10 22:45:19,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:45:19,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:19,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:45:19,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:19,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:19,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-03-10 22:45:19,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568675396] [2021-03-10 22:45:19,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:45:19,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:19,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:45:19,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:45:19,822 INFO L87 Difference]: Start difference. First operand 66 states and 126 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:19,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:19,839 INFO L93 Difference]: Finished difference Result 162 states and 309 transitions. [2021-03-10 22:45:19,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:45:19,840 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:45:19,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:19,841 INFO L225 Difference]: With dead ends: 162 [2021-03-10 22:45:19,841 INFO L226 Difference]: Without dead ends: 135 [2021-03-10 22:45:19,841 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:45:19,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-03-10 22:45:19,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2021-03-10 22:45:19,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.048076923076923) internal successors, (213), 104 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:19,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 213 transitions. [2021-03-10 22:45:19,858 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 213 transitions. Word has length 22 [2021-03-10 22:45:19,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:19,858 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 213 transitions. [2021-03-10 22:45:19,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:19,858 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 213 transitions. [2021-03-10 22:45:19,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:45:19,859 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:19,859 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:20,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-03-10 22:45:20,072 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:20,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:20,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1876617257, now seen corresponding path program 5 times [2021-03-10 22:45:20,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:20,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938795886] [2021-03-10 22:45:20,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:20,144 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:20,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938795886] [2021-03-10 22:45:20,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952013585] [2021-03-10 22:45:20,144 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) [2021-03-10 22:45:20,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:45:20,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:20,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 22:45:20,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:45:20,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:20,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:20,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-03-10 22:45:20,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166857617] [2021-03-10 22:45:20,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:45:20,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:20,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:45:20,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:45:20,289 INFO L87 Difference]: Start difference. First operand 105 states and 213 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:20,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:20,718 INFO L93 Difference]: Finished difference Result 364 states and 691 transitions. [2021-03-10 22:45:20,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:45:20,718 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:45:20,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:20,719 INFO L225 Difference]: With dead ends: 364 [2021-03-10 22:45:20,719 INFO L226 Difference]: Without dead ends: 334 [2021-03-10 22:45:20,720 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 371.0ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:45:20,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-03-10 22:45:20,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 92. [2021-03-10 22:45:20,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.967032967032967) internal successors, (179), 91 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:20,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 179 transitions. [2021-03-10 22:45:20,723 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 179 transitions. Word has length 24 [2021-03-10 22:45:20,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:20,724 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 179 transitions. [2021-03-10 22:45:20,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:20,724 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 179 transitions. [2021-03-10 22:45:20,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:45:20,724 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:20,724 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:20,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:45:20,943 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:20,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:20,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1240439411, now seen corresponding path program 6 times [2021-03-10 22:45:20,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:20,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698741658] [2021-03-10 22:45:20,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:20,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:20,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698741658] [2021-03-10 22:45:20,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417482209] [2021-03-10 22:45:20,991 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 [2021-03-10 22:45:21,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 22:45:21,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:21,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 22:45:21,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:21,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:21,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-03-10 22:45:21,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808095846] [2021-03-10 22:45:21,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:45:21,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:21,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:45:21,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:45:21,126 INFO L87 Difference]: Start difference. First operand 92 states and 179 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:21,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:21,510 INFO L93 Difference]: Finished difference Result 239 states and 453 transitions. [2021-03-10 22:45:21,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:45:21,511 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:45:21,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:21,511 INFO L225 Difference]: With dead ends: 239 [2021-03-10 22:45:21,512 INFO L226 Difference]: Without dead ends: 235 [2021-03-10 22:45:21,512 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 358.6ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:45:21,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-03-10 22:45:21,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 84. [2021-03-10 22:45:21,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.9759036144578312) internal successors, (164), 83 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:21,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 164 transitions. [2021-03-10 22:45:21,515 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 164 transitions. Word has length 24 [2021-03-10 22:45:21,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:21,515 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 164 transitions. [2021-03-10 22:45:21,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:21,515 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 164 transitions. [2021-03-10 22:45:21,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:45:21,515 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:21,515 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:21,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:45:21,732 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:21,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:21,733 INFO L82 PathProgramCache]: Analyzing trace with hash -465636203, now seen corresponding path program 7 times [2021-03-10 22:45:21,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:21,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087537871] [2021-03-10 22:45:21,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:21,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087537871] [2021-03-10 22:45:21,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290120426] [2021-03-10 22:45:21,785 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 [2021-03-10 22:45:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:21,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:45:21,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:21,901 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:21,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:21,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 22:45:21,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799031421] [2021-03-10 22:45:21,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:45:21,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:21,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:45:21,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:45:21,902 INFO L87 Difference]: Start difference. First operand 84 states and 164 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:21,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:21,924 INFO L93 Difference]: Finished difference Result 221 states and 426 transitions. [2021-03-10 22:45:21,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:45:21,924 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:45:21,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:21,926 INFO L225 Difference]: With dead ends: 221 [2021-03-10 22:45:21,926 INFO L226 Difference]: Without dead ends: 188 [2021-03-10 22:45:21,926 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:45:21,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-03-10 22:45:21,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 145. [2021-03-10 22:45:21,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.0833333333333335) internal successors, (300), 144 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:21,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 300 transitions. [2021-03-10 22:45:21,930 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 300 transitions. Word has length 26 [2021-03-10 22:45:21,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:21,930 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 300 transitions. [2021-03-10 22:45:21,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:21,930 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 300 transitions. [2021-03-10 22:45:21,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:45:21,931 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:21,931 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:22,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-10 22:45:22,139 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:22,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:22,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1485197677, now seen corresponding path program 8 times [2021-03-10 22:45:22,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:22,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541851062] [2021-03-10 22:45:22,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:22,241 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:22,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541851062] [2021-03-10 22:45:22,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537782490] [2021-03-10 22:45:22,242 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 [2021-03-10 22:45:22,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:45:22,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:22,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:45:22,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:22,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:22,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-03-10 22:45:22,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849101494] [2021-03-10 22:45:22,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:45:22,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:22,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:45:22,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:45:22,444 INFO L87 Difference]: Start difference. First operand 145 states and 300 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) [2021-03-10 22:45:23,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:23,103 INFO L93 Difference]: Finished difference Result 561 states and 1077 transitions. [2021-03-10 22:45:23,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 22:45:23,104 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) Word has length 28 [2021-03-10 22:45:23,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:23,105 INFO L225 Difference]: With dead ends: 561 [2021-03-10 22:45:23,105 INFO L226 Difference]: Without dead ends: 495 [2021-03-10 22:45:23,106 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 557.1ms TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 22:45:23,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-03-10 22:45:23,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 114. [2021-03-10 22:45:23,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.991150442477876) internal successors, (225), 113 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:23,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 225 transitions. [2021-03-10 22:45:23,110 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 225 transitions. Word has length 28 [2021-03-10 22:45:23,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:23,110 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 225 transitions. [2021-03-10 22:45:23,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) [2021-03-10 22:45:23,110 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 225 transitions. [2021-03-10 22:45:23,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:45:23,111 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:23,111 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:23,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:45:23,325 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:23,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:23,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1081045901, now seen corresponding path program 9 times [2021-03-10 22:45:23,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:23,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19429430] [2021-03-10 22:45:23,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:23,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19429430] [2021-03-10 22:45:23,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192410492] [2021-03-10 22:45:23,377 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 [2021-03-10 22:45:23,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 22:45:23,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:23,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:45:23,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:23,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:23,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-03-10 22:45:23,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021708371] [2021-03-10 22:45:23,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:45:23,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:23,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:45:23,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:45:23,532 INFO L87 Difference]: Start difference. First operand 114 states and 225 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:24,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:24,140 INFO L93 Difference]: Finished difference Result 351 states and 677 transitions. [2021-03-10 22:45:24,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 22:45:24,141 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:45:24,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:24,142 INFO L225 Difference]: With dead ends: 351 [2021-03-10 22:45:24,142 INFO L226 Difference]: Without dead ends: 347 [2021-03-10 22:45:24,142 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 555.8ms TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 22:45:24,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-03-10 22:45:24,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 102. [2021-03-10 22:45:24,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:24,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 202 transitions. [2021-03-10 22:45:24,145 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 202 transitions. Word has length 28 [2021-03-10 22:45:24,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:24,146 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 202 transitions. [2021-03-10 22:45:24,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:24,146 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 202 transitions. [2021-03-10 22:45:24,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:45:24,146 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:24,146 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:24,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:45:24,355 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:24,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:24,356 INFO L82 PathProgramCache]: Analyzing trace with hash 2026425425, now seen corresponding path program 10 times [2021-03-10 22:45:24,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:24,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943526625] [2021-03-10 22:45:24,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:24,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:24,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943526625] [2021-03-10 22:45:24,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394689565] [2021-03-10 22:45:24,402 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 [2021-03-10 22:45:24,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:45:24,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:24,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:45:24,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:24,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:24,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-03-10 22:45:24,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081788790] [2021-03-10 22:45:24,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:45:24,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:24,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:45:24,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:45:24,505 INFO L87 Difference]: Start difference. First operand 102 states and 202 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:24,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:24,547 INFO L93 Difference]: Finished difference Result 280 states and 543 transitions. [2021-03-10 22:45:24,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:45:24,548 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:45:24,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:24,549 INFO L225 Difference]: With dead ends: 280 [2021-03-10 22:45:24,549 INFO L226 Difference]: Without dead ends: 241 [2021-03-10 22:45:24,549 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:45:24,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-03-10 22:45:24,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 185. [2021-03-10 22:45:24,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.1032608695652173) internal successors, (387), 184 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:24,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 387 transitions. [2021-03-10 22:45:24,554 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 387 transitions. Word has length 30 [2021-03-10 22:45:24,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:24,554 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 387 transitions. [2021-03-10 22:45:24,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:24,555 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 387 transitions. [2021-03-10 22:45:24,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:45:24,555 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:24,555 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:24,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-03-10 22:45:24,771 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:24,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:24,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1274697551, now seen corresponding path program 11 times [2021-03-10 22:45:24,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:24,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080997969] [2021-03-10 22:45:24,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:24,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080997969] [2021-03-10 22:45:24,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480819650] [2021-03-10 22:45:24,892 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 [2021-03-10 22:45:24,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 22:45:24,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:24,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:45:24,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:25,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:25,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-03-10 22:45:25,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439332863] [2021-03-10 22:45:25,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 22:45:25,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:25,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 22:45:25,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:45:25,141 INFO L87 Difference]: Start difference. First operand 185 states and 387 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-03-10 22:45:26,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:26,114 INFO L93 Difference]: Finished difference Result 786 states and 1519 transitions. [2021-03-10 22:45:26,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 22:45:26,115 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) Word has length 32 [2021-03-10 22:45:26,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:26,116 INFO L225 Difference]: With dead ends: 786 [2021-03-10 22:45:26,116 INFO L226 Difference]: Without dead ends: 678 [2021-03-10 22:45:26,117 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 851.8ms TimeCoverageRelationStatistics Valid=1299, Invalid=3671, Unknown=0, NotChecked=0, Total=4970 [2021-03-10 22:45:26,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-03-10 22:45:26,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 136. [2021-03-10 22:45:26,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.0074074074074075) internal successors, (271), 135 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:26,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 271 transitions. [2021-03-10 22:45:26,122 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 271 transitions. Word has length 32 [2021-03-10 22:45:26,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:26,122 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 271 transitions. [2021-03-10 22:45:26,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-03-10 22:45:26,122 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 271 transitions. [2021-03-10 22:45:26,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:45:26,122 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:26,123 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:26,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-10 22:45:26,337 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:26,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:26,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1086729587, now seen corresponding path program 12 times [2021-03-10 22:45:26,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:26,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295478625] [2021-03-10 22:45:26,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:26,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:26,403 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:26,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295478625] [2021-03-10 22:45:26,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573136804] [2021-03-10 22:45:26,403 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 [2021-03-10 22:45:26,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 22:45:26,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:26,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:45:26,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:26,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:26,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-03-10 22:45:26,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883820157] [2021-03-10 22:45:26,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:45:26,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:26,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:45:26,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:45:26,617 INFO L87 Difference]: Start difference. First operand 136 states and 271 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:27,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:27,484 INFO L93 Difference]: Finished difference Result 485 states and 945 transitions. [2021-03-10 22:45:27,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 22:45:27,485 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:45:27,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:27,486 INFO L225 Difference]: With dead ends: 485 [2021-03-10 22:45:27,486 INFO L226 Difference]: Without dead ends: 481 [2021-03-10 22:45:27,487 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 799.2ms TimeCoverageRelationStatistics Valid=1088, Invalid=3334, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 22:45:27,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-03-10 22:45:27,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 120. [2021-03-10 22:45:27,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0168067226890756) internal successors, (240), 119 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:27,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 240 transitions. [2021-03-10 22:45:27,492 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 240 transitions. Word has length 32 [2021-03-10 22:45:27,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:27,492 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 240 transitions. [2021-03-10 22:45:27,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:27,492 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 240 transitions. [2021-03-10 22:45:27,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 22:45:27,492 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:27,492 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:27,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 22:45:27,708 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:27,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:27,708 INFO L82 PathProgramCache]: Analyzing trace with hash -4049395, now seen corresponding path program 13 times [2021-03-10 22:45:27,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:27,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765939583] [2021-03-10 22:45:27,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:27,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765939583] [2021-03-10 22:45:27,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846328479] [2021-03-10 22:45:27,761 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) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:45:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:27,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:45:27,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:27,872 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:27,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:27,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 22:45:27,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798041148] [2021-03-10 22:45:27,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:45:27,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:27,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:45:27,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:45:27,873 INFO L87 Difference]: Start difference. First operand 120 states and 240 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:27,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:27,911 INFO L93 Difference]: Finished difference Result 339 states and 660 transitions. [2021-03-10 22:45:27,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:45:27,912 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 22:45:27,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:27,913 INFO L225 Difference]: With dead ends: 339 [2021-03-10 22:45:27,913 INFO L226 Difference]: Without dead ends: 294 [2021-03-10 22:45:27,913 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:45:27,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-03-10 22:45:27,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 225. [2021-03-10 22:45:27,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.1160714285714284) internal successors, (474), 224 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:27,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 474 transitions. [2021-03-10 22:45:27,917 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 474 transitions. Word has length 34 [2021-03-10 22:45:27,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:27,917 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 474 transitions. [2021-03-10 22:45:27,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:27,917 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 474 transitions. [2021-03-10 22:45:27,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 22:45:27,918 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:27,918 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:28,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:45:28,131 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:28,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:28,132 INFO L82 PathProgramCache]: Analyzing trace with hash 2031751691, now seen corresponding path program 14 times [2021-03-10 22:45:28,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:28,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957809777] [2021-03-10 22:45:28,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:28,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957809777] [2021-03-10 22:45:28,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123413699] [2021-03-10 22:45:28,250 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 [2021-03-10 22:45:28,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:45:28,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:28,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:45:28,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:28,508 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:28,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:28,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-03-10 22:45:28,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400039480] [2021-03-10 22:45:28,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 22:45:28,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:28,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 22:45:28,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:45:28,509 INFO L87 Difference]: Start difference. First operand 225 states and 474 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:29,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:29,853 INFO L93 Difference]: Finished difference Result 1039 states and 2017 transitions. [2021-03-10 22:45:29,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-10 22:45:29,855 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-10 22:45:29,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:29,857 INFO L225 Difference]: With dead ends: 1039 [2021-03-10 22:45:29,857 INFO L226 Difference]: Without dead ends: 883 [2021-03-10 22:45:29,858 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2332 ImplicationChecksByTransitivity, 1170.6ms TimeCoverageRelationStatistics Valid=2085, Invalid=5925, Unknown=0, NotChecked=0, Total=8010 [2021-03-10 22:45:29,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-03-10 22:45:29,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 158. [2021-03-10 22:45:29,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.0191082802547773) internal successors, (317), 157 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:29,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 317 transitions. [2021-03-10 22:45:29,863 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 317 transitions. Word has length 36 [2021-03-10 22:45:29,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:29,863 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 317 transitions. [2021-03-10 22:45:29,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:29,863 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 317 transitions. [2021-03-10 22:45:29,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 22:45:29,864 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:29,864 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:30,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 22:45:30,074 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:30,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:30,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1527693965, now seen corresponding path program 15 times [2021-03-10 22:45:30,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:30,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473484399] [2021-03-10 22:45:30,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:30,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:30,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473484399] [2021-03-10 22:45:30,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090821263] [2021-03-10 22:45:30,139 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 [2021-03-10 22:45:30,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 22:45:30,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:30,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:45:30,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:30,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:30,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2021-03-10 22:45:30,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586067809] [2021-03-10 22:45:30,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:45:30,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:30,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:45:30,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:45:30,396 INFO L87 Difference]: Start difference. First operand 158 states and 317 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:31,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:31,626 INFO L93 Difference]: Finished difference Result 641 states and 1257 transitions. [2021-03-10 22:45:31,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-03-10 22:45:31,626 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-10 22:45:31,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:31,628 INFO L225 Difference]: With dead ends: 641 [2021-03-10 22:45:31,628 INFO L226 Difference]: Without dead ends: 637 [2021-03-10 22:45:31,629 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2300 ImplicationChecksByTransitivity, 1139.6ms TimeCoverageRelationStatistics Valid=1724, Invalid=5416, Unknown=0, NotChecked=0, Total=7140 [2021-03-10 22:45:31,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-03-10 22:45:31,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 138. [2021-03-10 22:45:31,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0291970802919708) internal successors, (278), 137 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:31,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 278 transitions. [2021-03-10 22:45:31,633 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 278 transitions. Word has length 36 [2021-03-10 22:45:31,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:31,633 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 278 transitions. [2021-03-10 22:45:31,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:31,633 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 278 transitions. [2021-03-10 22:45:31,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 22:45:31,634 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:31,634 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:31,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 22:45:31,856 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:31,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:31,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1675506121, now seen corresponding path program 16 times [2021-03-10 22:45:31,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:31,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775009058] [2021-03-10 22:45:31,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:31,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:31,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775009058] [2021-03-10 22:45:31,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877318134] [2021-03-10 22:45:31,925 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 [2021-03-10 22:45:31,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:45:31,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:31,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:45:31,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:32,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:32,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-10 22:45:32,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759570952] [2021-03-10 22:45:32,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:45:32,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:32,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:45:32,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:45:32,072 INFO L87 Difference]: Start difference. First operand 138 states and 278 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:32,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:32,137 INFO L93 Difference]: Finished difference Result 398 states and 777 transitions. [2021-03-10 22:45:32,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:45:32,138 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 22:45:32,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:32,139 INFO L225 Difference]: With dead ends: 398 [2021-03-10 22:45:32,139 INFO L226 Difference]: Without dead ends: 347 [2021-03-10 22:45:32,139 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:45:32,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-03-10 22:45:32,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 265. [2021-03-10 22:45:32,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.125) internal successors, (561), 264 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:32,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 561 transitions. [2021-03-10 22:45:32,143 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 561 transitions. Word has length 38 [2021-03-10 22:45:32,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:32,143 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 561 transitions. [2021-03-10 22:45:32,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:32,143 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 561 transitions. [2021-03-10 22:45:32,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 22:45:32,144 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:32,144 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:32,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:45:32,358 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:32,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:32,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1976295111, now seen corresponding path program 17 times [2021-03-10 22:45:32,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:32,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964750754] [2021-03-10 22:45:32,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:32,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964750754] [2021-03-10 22:45:32,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755260507] [2021-03-10 22:45:32,500 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 [2021-03-10 22:45:32,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 22:45:32,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:32,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:45:32,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:32,805 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:32,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:32,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-03-10 22:45:32,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85009182] [2021-03-10 22:45:32,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 22:45:32,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:32,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 22:45:32,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:45:32,806 INFO L87 Difference]: Start difference. First operand 265 states and 561 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:34,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:34,624 INFO L93 Difference]: Finished difference Result 1320 states and 2571 transitions. [2021-03-10 22:45:34,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-03-10 22:45:34,625 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 22:45:34,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:34,628 INFO L225 Difference]: With dead ends: 1320 [2021-03-10 22:45:34,628 INFO L226 Difference]: Without dead ends: 1110 [2021-03-10 22:45:34,630 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3798 ImplicationChecksByTransitivity, 1626.9ms TimeCoverageRelationStatistics Valid=3180, Invalid=9030, Unknown=0, NotChecked=0, Total=12210 [2021-03-10 22:45:34,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-03-10 22:45:34,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 180. [2021-03-10 22:45:34,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.0279329608938546) internal successors, (363), 179 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:34,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 363 transitions. [2021-03-10 22:45:34,635 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 363 transitions. Word has length 40 [2021-03-10 22:45:34,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:34,635 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 363 transitions. [2021-03-10 22:45:34,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:34,635 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 363 transitions. [2021-03-10 22:45:34,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 22:45:34,636 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:34,636 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:34,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:45:34,842 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:34,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:34,842 INFO L82 PathProgramCache]: Analyzing trace with hash -302152819, now seen corresponding path program 18 times [2021-03-10 22:45:34,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:34,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661669922] [2021-03-10 22:45:34,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:34,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661669922] [2021-03-10 22:45:34,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949173377] [2021-03-10 22:45:34,917 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) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:45:34,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 22:45:34,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:34,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:45:34,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:35,212 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:35,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:35,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2021-03-10 22:45:35,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644681042] [2021-03-10 22:45:35,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 22:45:35,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:35,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 22:45:35,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:45:35,213 INFO L87 Difference]: Start difference. First operand 180 states and 363 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:36,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:36,904 INFO L93 Difference]: Finished difference Result 819 states and 1613 transitions. [2021-03-10 22:45:36,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-03-10 22:45:36,904 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 22:45:36,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:36,906 INFO L225 Difference]: With dead ends: 819 [2021-03-10 22:45:36,906 INFO L226 Difference]: Without dead ends: 815 [2021-03-10 22:45:36,909 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3762 ImplicationChecksByTransitivity, 1547.6ms TimeCoverageRelationStatistics Valid=2606, Invalid=8314, Unknown=0, NotChecked=0, Total=10920 [2021-03-10 22:45:36,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2021-03-10 22:45:36,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 156. [2021-03-10 22:45:36,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.0387096774193547) internal successors, (316), 155 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 316 transitions. [2021-03-10 22:45:36,913 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 316 transitions. Word has length 40 [2021-03-10 22:45:36,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:36,913 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 316 transitions. [2021-03-10 22:45:36,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:36,914 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 316 transitions. [2021-03-10 22:45:36,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 22:45:36,915 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:36,915 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:37,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:45:37,131 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:37,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:37,131 INFO L82 PathProgramCache]: Analyzing trace with hash -78659707, now seen corresponding path program 19 times [2021-03-10 22:45:37,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:37,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174088622] [2021-03-10 22:45:37,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:37,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:37,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174088622] [2021-03-10 22:45:37,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145604691] [2021-03-10 22:45:37,224 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) [2021-03-10 22:45:37,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:37,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:45:37,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:45:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:37,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:37,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-10 22:45:37,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655243415] [2021-03-10 22:45:37,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:45:37,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:37,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:45:37,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:45:37,396 INFO L87 Difference]: Start difference. First operand 156 states and 316 transitions. Second operand has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:37,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:37,469 INFO L93 Difference]: Finished difference Result 457 states and 894 transitions. [2021-03-10 22:45:37,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:45:37,470 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 22:45:37,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:37,471 INFO L225 Difference]: With dead ends: 457 [2021-03-10 22:45:37,471 INFO L226 Difference]: Without dead ends: 400 [2021-03-10 22:45:37,471 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 133.7ms TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:45:37,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-03-10 22:45:37,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 305. [2021-03-10 22:45:37,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.1315789473684212) internal successors, (648), 304 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:37,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 648 transitions. [2021-03-10 22:45:37,475 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 648 transitions. Word has length 42 [2021-03-10 22:45:37,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:37,475 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 648 transitions. [2021-03-10 22:45:37,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:37,475 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 648 transitions. [2021-03-10 22:45:37,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 22:45:37,476 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:37,476 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:37,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-10 22:45:37,687 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:37,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:37,687 INFO L82 PathProgramCache]: Analyzing trace with hash -729629309, now seen corresponding path program 20 times [2021-03-10 22:45:37,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:37,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124988109] [2021-03-10 22:45:37,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:37,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:37,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124988109] [2021-03-10 22:45:37,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287184704] [2021-03-10 22:45:37,854 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 [2021-03-10 22:45:37,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:45:37,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:37,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 22:45:37,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:38,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:38,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-03-10 22:45:38,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35938919] [2021-03-10 22:45:38,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-03-10 22:45:38,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:38,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-03-10 22:45:38,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1143, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:45:38,211 INFO L87 Difference]: Start difference. First operand 305 states and 648 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:40,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:40,689 INFO L93 Difference]: Finished difference Result 1629 states and 3181 transitions. [2021-03-10 22:45:40,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-03-10 22:45:40,690 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 22:45:40,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:40,692 INFO L225 Difference]: With dead ends: 1629 [2021-03-10 22:45:40,692 INFO L226 Difference]: Without dead ends: 1359 [2021-03-10 22:45:40,693 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5875 ImplicationChecksByTransitivity, 2179.3ms TimeCoverageRelationStatistics Valid=4657, Invalid=13165, Unknown=0, NotChecked=0, Total=17822 [2021-03-10 22:45:40,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-03-10 22:45:40,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 202. [2021-03-10 22:45:40,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.0348258706467663) internal successors, (409), 201 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) [2021-03-10 22:45:40,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 409 transitions. [2021-03-10 22:45:40,699 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 409 transitions. Word has length 44 [2021-03-10 22:45:40,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:40,699 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 409 transitions. [2021-03-10 22:45:40,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:40,700 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 409 transitions. [2021-03-10 22:45:40,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 22:45:40,700 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:40,700 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:40,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 22:45:40,915 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:40,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:40,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1199920525, now seen corresponding path program 21 times [2021-03-10 22:45:40,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:40,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505294280] [2021-03-10 22:45:40,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:41,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505294280] [2021-03-10 22:45:41,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854773698] [2021-03-10 22:45:41,005 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) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:45:41,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-03-10 22:45:41,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:41,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 22:45:41,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:41,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:41,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2021-03-10 22:45:41,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720316339] [2021-03-10 22:45:41,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 22:45:41,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:41,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 22:45:41,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:45:41,375 INFO L87 Difference]: Start difference. First operand 202 states and 409 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:43,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:43,592 INFO L93 Difference]: Finished difference Result 1019 states and 2013 transitions. [2021-03-10 22:45:43,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-03-10 22:45:43,592 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 22:45:43,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:43,594 INFO L225 Difference]: With dead ends: 1019 [2021-03-10 22:45:43,595 INFO L226 Difference]: Without dead ends: 1015 [2021-03-10 22:45:43,596 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5830 ImplicationChecksByTransitivity, 2081.6ms TimeCoverageRelationStatistics Valid=3791, Invalid=12211, Unknown=0, NotChecked=0, Total=16002 [2021-03-10 22:45:43,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2021-03-10 22:45:43,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 174. [2021-03-10 22:45:43,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.046242774566474) internal successors, (354), 173 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:43,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 354 transitions. [2021-03-10 22:45:43,601 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 354 transitions. Word has length 44 [2021-03-10 22:45:43,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:43,602 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 354 transitions. [2021-03-10 22:45:43,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:43,602 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 354 transitions. [2021-03-10 22:45:43,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 22:45:43,602 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:43,602 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:43,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:45:43,819 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:43,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:43,820 INFO L82 PathProgramCache]: Analyzing trace with hash -2016813247, now seen corresponding path program 22 times [2021-03-10 22:45:43,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:43,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987912726] [2021-03-10 22:45:43,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:43,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:43,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987912726] [2021-03-10 22:45:43,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630383588] [2021-03-10 22:45:43,901 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 [2021-03-10 22:45:43,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:45:43,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:43,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:45:43,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:44,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:44,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-03-10 22:45:44,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465078929] [2021-03-10 22:45:44,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:45:44,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:44,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:45:44,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:45:44,091 INFO L87 Difference]: Start difference. First operand 174 states and 354 transitions. Second operand has 20 states, 20 states have (on average 4.3) internal successors, (86), 20 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:44,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:44,180 INFO L93 Difference]: Finished difference Result 516 states and 1011 transitions. [2021-03-10 22:45:44,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:45:44,180 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.3) internal successors, (86), 20 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-10 22:45:44,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:44,181 INFO L225 Difference]: With dead ends: 516 [2021-03-10 22:45:44,181 INFO L226 Difference]: Without dead ends: 453 [2021-03-10 22:45:44,181 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 151.1ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:45:44,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-03-10 22:45:44,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 345. [2021-03-10 22:45:44,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.136627906976744) internal successors, (735), 344 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:44,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 735 transitions. [2021-03-10 22:45:44,186 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 735 transitions. Word has length 46 [2021-03-10 22:45:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:44,186 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 735 transitions. [2021-03-10 22:45:44,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.3) internal successors, (86), 20 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:44,186 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 735 transitions. [2021-03-10 22:45:44,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-03-10 22:45:44,186 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:44,187 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:44,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 22:45:44,401 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:44,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:44,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1932635711, now seen corresponding path program 23 times [2021-03-10 22:45:44,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:44,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285950272] [2021-03-10 22:45:44,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:44,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:44,620 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:44,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285950272] [2021-03-10 22:45:44,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638138414] [2021-03-10 22:45:44,620 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 [2021-03-10 22:45:44,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 22:45:44,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:44,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:45:44,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:45,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:45,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-03-10 22:45:45,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221730353] [2021-03-10 22:45:45,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-03-10 22:45:45,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:45,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-03-10 22:45:45,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:45:45,040 INFO L87 Difference]: Start difference. First operand 345 states and 735 transitions. Second operand has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:48,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:48,218 INFO L93 Difference]: Finished difference Result 1966 states and 3847 transitions. [2021-03-10 22:45:48,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-03-10 22:45:48,219 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-03-10 22:45:48,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:48,222 INFO L225 Difference]: With dead ends: 1966 [2021-03-10 22:45:48,222 INFO L226 Difference]: Without dead ends: 1630 [2021-03-10 22:45:48,224 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8718 ImplicationChecksByTransitivity, 2868.4ms TimeCoverageRelationStatistics Valid=6597, Invalid=18525, Unknown=0, NotChecked=0, Total=25122 [2021-03-10 22:45:48,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2021-03-10 22:45:48,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 224. [2021-03-10 22:45:48,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.0403587443946187) internal successors, (455), 223 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:48,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 455 transitions. [2021-03-10 22:45:48,230 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 455 transitions. Word has length 48 [2021-03-10 22:45:48,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:48,230 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 455 transitions. [2021-03-10 22:45:48,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:48,230 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 455 transitions. [2021-03-10 22:45:48,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-03-10 22:45:48,231 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:48,231 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:48,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:45:48,435 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:48,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:48,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1888843917, now seen corresponding path program 24 times [2021-03-10 22:45:48,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:48,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076328414] [2021-03-10 22:45:48,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:48,537 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:48,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076328414] [2021-03-10 22:45:48,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741699164] [2021-03-10 22:45:48,537 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) [2021-03-10 22:45:48,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-03-10 22:45:48,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:48,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:45:48,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:45:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:48,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:48,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2021-03-10 22:45:48,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080530327] [2021-03-10 22:45:48,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 22:45:48,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:48,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 22:45:48,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:45:48,959 INFO L87 Difference]: Start difference. First operand 224 states and 455 transitions. Second operand has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:51,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:51,676 INFO L93 Difference]: Finished difference Result 1241 states and 2457 transitions. [2021-03-10 22:45:51,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-03-10 22:45:51,676 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-03-10 22:45:51,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:51,679 INFO L225 Difference]: With dead ends: 1241 [2021-03-10 22:45:51,679 INFO L226 Difference]: Without dead ends: 1237 [2021-03-10 22:45:51,680 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8653 ImplicationChecksByTransitivity, 2627.0ms TimeCoverageRelationStatistics Valid=5342, Invalid=17308, Unknown=0, NotChecked=0, Total=22650 [2021-03-10 22:45:51,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-03-10 22:45:51,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 192. [2021-03-10 22:45:51,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.0523560209424083) internal successors, (392), 191 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:51,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 392 transitions. [2021-03-10 22:45:51,685 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 392 transitions. Word has length 48 [2021-03-10 22:45:51,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:51,685 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 392 transitions. [2021-03-10 22:45:51,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:51,685 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 392 transitions. [2021-03-10 22:45:51,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-03-10 22:45:51,685 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:51,685 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:51,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 22:45:51,899 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:51,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:51,899 INFO L82 PathProgramCache]: Analyzing trace with hash 914329853, now seen corresponding path program 25 times [2021-03-10 22:45:51,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:51,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612976453] [2021-03-10 22:45:51,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:51,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612976453] [2021-03-10 22:45:51,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083570029] [2021-03-10 22:45:51,992 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 [2021-03-10 22:45:52,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:52,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:45:52,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:52,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:52,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-03-10 22:45:52,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256844778] [2021-03-10 22:45:52,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:45:52,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:52,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:45:52,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:45:52,234 INFO L87 Difference]: Start difference. First operand 192 states and 392 transitions. Second operand has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 22 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:52,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:52,342 INFO L93 Difference]: Finished difference Result 575 states and 1128 transitions. [2021-03-10 22:45:52,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:45:52,342 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 22 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-03-10 22:45:52,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:52,344 INFO L225 Difference]: With dead ends: 575 [2021-03-10 22:45:52,344 INFO L226 Difference]: Without dead ends: 506 [2021-03-10 22:45:52,344 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 180.3ms TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:45:52,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-03-10 22:45:52,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 385. [2021-03-10 22:45:52,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.140625) internal successors, (822), 384 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:52,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 822 transitions. [2021-03-10 22:45:52,348 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 822 transitions. Word has length 50 [2021-03-10 22:45:52,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:52,348 INFO L480 AbstractCegarLoop]: Abstraction has 385 states and 822 transitions. [2021-03-10 22:45:52,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 22 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:52,348 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 822 transitions. [2021-03-10 22:45:52,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-03-10 22:45:52,349 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:52,349 INFO L519 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:52,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-03-10 22:45:52,555 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:52,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:52,555 INFO L82 PathProgramCache]: Analyzing trace with hash 2068558075, now seen corresponding path program 26 times [2021-03-10 22:45:52,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:52,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660550471] [2021-03-10 22:45:52,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:52,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660550471] [2021-03-10 22:45:52,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664727286] [2021-03-10 22:45:52,769 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) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:45:52,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:45:52,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:52,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:45:52,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:53,291 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:53,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:53,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-03-10 22:45:53,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658427833] [2021-03-10 22:45:53,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-03-10 22:45:53,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:53,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-03-10 22:45:53,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1694, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 22:45:53,292 INFO L87 Difference]: Start difference. First operand 385 states and 822 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:57,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:57,311 INFO L93 Difference]: Finished difference Result 2331 states and 4569 transitions. [2021-03-10 22:45:57,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-03-10 22:45:57,312 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-03-10 22:45:57,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:57,316 INFO L225 Difference]: With dead ends: 2331 [2021-03-10 22:45:57,316 INFO L226 Difference]: Without dead ends: 1923 [2021-03-10 22:45:57,317 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12499 ImplicationChecksByTransitivity, 3606.2ms TimeCoverageRelationStatistics Valid=9089, Invalid=25321, Unknown=0, NotChecked=0, Total=34410 [2021-03-10 22:45:57,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2021-03-10 22:45:57,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 246. [2021-03-10 22:45:57,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0448979591836736) internal successors, (501), 245 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:57,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 501 transitions. [2021-03-10 22:45:57,324 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 501 transitions. Word has length 52 [2021-03-10 22:45:57,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:57,324 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 501 transitions. [2021-03-10 22:45:57,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:57,324 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 501 transitions. [2021-03-10 22:45:57,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-03-10 22:45:57,324 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:57,324 INFO L519 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:57,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 22:45:57,539 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:57,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:57,539 INFO L82 PathProgramCache]: Analyzing trace with hash -275960691, now seen corresponding path program 27 times [2021-03-10 22:45:57,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:57,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4174613] [2021-03-10 22:45:57,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:57,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4174613] [2021-03-10 22:45:57,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653977286] [2021-03-10 22:45:57,650 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 [2021-03-10 22:45:57,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-03-10 22:45:57,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:57,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:45:57,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:58,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:58,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2021-03-10 22:45:58,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679007698] [2021-03-10 22:45:58,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 22:45:58,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:58,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 22:45:58,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:45:58,110 INFO L87 Difference]: Start difference. First operand 246 states and 501 transitions. Second operand has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:01,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:46:01,616 INFO L93 Difference]: Finished difference Result 1485 states and 2945 transitions. [2021-03-10 22:46:01,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-03-10 22:46:01,617 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-03-10 22:46:01,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:46:01,620 INFO L225 Difference]: With dead ends: 1485 [2021-03-10 22:46:01,620 INFO L226 Difference]: Without dead ends: 1481 [2021-03-10 22:46:01,621 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12396 ImplicationChecksByTransitivity, 3318.2ms TimeCoverageRelationStatistics Valid=7328, Invalid=23824, Unknown=0, NotChecked=0, Total=31152 [2021-03-10 22:46:01,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-03-10 22:46:01,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 210. [2021-03-10 22:46:01,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.0574162679425836) internal successors, (430), 209 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:01,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 430 transitions. [2021-03-10 22:46:01,626 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 430 transitions. Word has length 52 [2021-03-10 22:46:01,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:46:01,626 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 430 transitions. [2021-03-10 22:46:01,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:01,627 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 430 transitions. [2021-03-10 22:46:01,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-03-10 22:46:01,627 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:46:01,627 INFO L519 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:46:01,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:46:01,842 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:46:01,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:46:01,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1608264519, now seen corresponding path program 28 times [2021-03-10 22:46:01,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:46:01,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567448313] [2021-03-10 22:46:01,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:46:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:46:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:01,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567448313] [2021-03-10 22:46:01,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334102741] [2021-03-10 22:46:01,950 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 [2021-03-10 22:46:01,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:46:01,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:46:01,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:46:01,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:46:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:02,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:46:02,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-03-10 22:46:02,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883082473] [2021-03-10 22:46:02,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:46:02,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:46:02,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:46:02,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:46:02,203 INFO L87 Difference]: Start difference. First operand 210 states and 430 transitions. Second operand has 24 states, 24 states have (on average 4.25) internal successors, (102), 24 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:02,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:46:02,319 INFO L93 Difference]: Finished difference Result 634 states and 1245 transitions. [2021-03-10 22:46:02,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:46:02,319 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.25) internal successors, (102), 24 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-03-10 22:46:02,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:46:02,320 INFO L225 Difference]: With dead ends: 634 [2021-03-10 22:46:02,320 INFO L226 Difference]: Without dead ends: 559 [2021-03-10 22:46:02,321 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 219.7ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:46:02,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-03-10 22:46:02,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 425. [2021-03-10 22:46:02,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.143867924528302) internal successors, (909), 424 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:02,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 909 transitions. [2021-03-10 22:46:02,325 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 909 transitions. Word has length 54 [2021-03-10 22:46:02,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:46:02,325 INFO L480 AbstractCegarLoop]: Abstraction has 425 states and 909 transitions. [2021-03-10 22:46:02,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.25) internal successors, (102), 24 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:02,325 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 909 transitions. [2021-03-10 22:46:02,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:46:02,326 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:46:02,326 INFO L519 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:46:02,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-03-10 22:46:02,540 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:46:02,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:46:02,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1640220087, now seen corresponding path program 29 times [2021-03-10 22:46:02,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:46:02,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378973188] [2021-03-10 22:46:02,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:46:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:46:02,826 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:02,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378973188] [2021-03-10 22:46:02,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088640839] [2021-03-10 22:46:02,826 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 [2021-03-10 22:46:02,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-03-10 22:46:02,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:46:02,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:46:02,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:46:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:03,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:46:03,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-03-10 22:46:03,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286587667] [2021-03-10 22:46:03,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-03-10 22:46:03,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:46:03,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-03-10 22:46:03,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=2010, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 22:46:03,420 INFO L87 Difference]: Start difference. First operand 425 states and 909 transitions. Second operand has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:08,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:46:08,474 INFO L93 Difference]: Finished difference Result 2724 states and 5347 transitions. [2021-03-10 22:46:08,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-03-10 22:46:08,475 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-03-10 22:46:08,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:46:08,480 INFO L225 Difference]: With dead ends: 2724 [2021-03-10 22:46:08,480 INFO L226 Difference]: Without dead ends: 2238 [2021-03-10 22:46:08,481 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17409 ImplicationChecksByTransitivity, 4561.2ms TimeCoverageRelationStatistics Valid=12230, Invalid=33780, Unknown=0, NotChecked=0, Total=46010 [2021-03-10 22:46:08,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2021-03-10 22:46:08,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 268. [2021-03-10 22:46:08,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.048689138576779) internal successors, (547), 267 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:08,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 547 transitions. [2021-03-10 22:46:08,489 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 547 transitions. Word has length 56 [2021-03-10 22:46:08,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:46:08,489 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 547 transitions. [2021-03-10 22:46:08,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:08,490 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 547 transitions. [2021-03-10 22:46:08,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:46:08,490 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:46:08,490 INFO L519 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:46:08,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:46:08,704 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:46:08,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:46:08,705 INFO L82 PathProgramCache]: Analyzing trace with hash 205238669, now seen corresponding path program 30 times [2021-03-10 22:46:08,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:46:08,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010994064] [2021-03-10 22:46:08,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:46:08,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:46:08,838 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:08,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010994064] [2021-03-10 22:46:08,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230411057] [2021-03-10 22:46:08,839 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) [2021-03-10 22:46:08,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-03-10 22:46:08,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:46:08,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:46:08,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:46:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:09,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:46:09,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 38 [2021-03-10 22:46:09,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269211929] [2021-03-10 22:46:09,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-03-10 22:46:09,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:46:09,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-03-10 22:46:09,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1174, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:46:09,406 INFO L87 Difference]: Start difference. First operand 268 states and 547 transitions. Second operand has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:13,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:46:13,871 INFO L93 Difference]: Finished difference Result 1751 states and 3477 transitions. [2021-03-10 22:46:13,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2021-03-10 22:46:13,872 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-03-10 22:46:13,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:46:13,874 INFO L225 Difference]: With dead ends: 1751 [2021-03-10 22:46:13,874 INFO L226 Difference]: Without dead ends: 1747 [2021-03-10 22:46:13,876 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17241 ImplicationChecksByTransitivity, 4231.1ms TimeCoverageRelationStatistics Valid=9824, Invalid=31996, Unknown=0, NotChecked=0, Total=41820 [2021-03-10 22:46:13,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-03-10 22:46:13,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 228. [2021-03-10 22:46:13,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.0616740088105727) internal successors, (468), 227 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:13,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 468 transitions. [2021-03-10 22:46:13,882 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 468 transitions. Word has length 56 [2021-03-10 22:46:13,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:46:13,882 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 468 transitions. [2021-03-10 22:46:13,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:13,882 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 468 transitions. [2021-03-10 22:46:13,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-03-10 22:46:13,882 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:46:13,882 INFO L519 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:46:14,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-10 22:46:14,097 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:46:14,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:46:14,097 INFO L82 PathProgramCache]: Analyzing trace with hash -924210571, now seen corresponding path program 31 times [2021-03-10 22:46:14,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:46:14,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529109668] [2021-03-10 22:46:14,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:46:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:46:14,224 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:14,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529109668] [2021-03-10 22:46:14,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207901660] [2021-03-10 22:46:14,225 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 [2021-03-10 22:46:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:46:14,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 22:46:14,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:46:14,572 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:14,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:46:14,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-03-10 22:46:14,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963929621] [2021-03-10 22:46:14,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 22:46:14,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:46:14,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 22:46:14,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:46:14,574 INFO L87 Difference]: Start difference. First operand 228 states and 468 transitions. Second operand has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:14,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:46:14,722 INFO L93 Difference]: Finished difference Result 693 states and 1362 transitions. [2021-03-10 22:46:14,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:46:14,723 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-03-10 22:46:14,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:46:14,728 INFO L225 Difference]: With dead ends: 693 [2021-03-10 22:46:14,728 INFO L226 Difference]: Without dead ends: 612 [2021-03-10 22:46:14,728 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 307.8ms TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:46:14,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-03-10 22:46:14,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 465. [2021-03-10 22:46:14,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.146551724137931) internal successors, (996), 464 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:14,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 996 transitions. [2021-03-10 22:46:14,733 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 996 transitions. Word has length 58 [2021-03-10 22:46:14,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:46:14,733 INFO L480 AbstractCegarLoop]: Abstraction has 465 states and 996 transitions. [2021-03-10 22:46:14,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:14,733 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 996 transitions. [2021-03-10 22:46:14,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-03-10 22:46:14,733 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:46:14,734 INFO L519 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:46:14,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-03-10 22:46:14,948 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:46:14,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:46:14,949 INFO L82 PathProgramCache]: Analyzing trace with hash -418583437, now seen corresponding path program 32 times [2021-03-10 22:46:14,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:46:14,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106098564] [2021-03-10 22:46:14,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:46:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:46:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:15,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106098564] [2021-03-10 22:46:15,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272546610] [2021-03-10 22:46:15,277 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) [2021-03-10 22:46:15,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:46:15,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:46:15,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 22:46:15,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:46:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:15,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:46:15,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-03-10 22:46:15,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188206254] [2021-03-10 22:46:15,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-03-10 22:46:15,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:46:15,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-03-10 22:46:15,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2353, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 22:46:15,967 INFO L87 Difference]: Start difference. First operand 465 states and 996 transitions. Second operand has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:22,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:46:22,277 INFO L93 Difference]: Finished difference Result 3145 states and 6181 transitions. [2021-03-10 22:46:22,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-03-10 22:46:22,277 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-03-10 22:46:22,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:46:22,280 INFO L225 Difference]: With dead ends: 3145 [2021-03-10 22:46:22,280 INFO L226 Difference]: Without dead ends: 2575 [2021-03-10 22:46:22,282 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23656 ImplicationChecksByTransitivity, 5712.1ms TimeCoverageRelationStatistics Valid=16125, Invalid=44145, Unknown=0, NotChecked=0, Total=60270 [2021-03-10 22:46:22,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2575 states. [2021-03-10 22:46:22,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2575 to 290. [2021-03-10 22:46:22,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.0519031141868513) internal successors, (593), 289 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:22,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 593 transitions. [2021-03-10 22:46:22,290 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 593 transitions. Word has length 60 [2021-03-10 22:46:22,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:46:22,290 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 593 transitions. [2021-03-10 22:46:22,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:22,291 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 593 transitions. [2021-03-10 22:46:22,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-03-10 22:46:22,291 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:46:22,291 INFO L519 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:46:22,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 22:46:22,505 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:46:22,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:46:22,506 INFO L82 PathProgramCache]: Analyzing trace with hash 333465485, now seen corresponding path program 33 times [2021-03-10 22:46:22,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:46:22,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681130597] [2021-03-10 22:46:22,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:46:22,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:46:22,668 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:22,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681130597] [2021-03-10 22:46:22,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861625538] [2021-03-10 22:46:22,668 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 [2021-03-10 22:46:22,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-03-10 22:46:22,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:46:22,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 22:46:22,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:46:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:23,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:46:23,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 41 [2021-03-10 22:46:23,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237237491] [2021-03-10 22:46:23,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-03-10 22:46:23,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:46:23,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-03-10 22:46:23,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1369, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:46:23,307 INFO L87 Difference]: Start difference. First operand 290 states and 593 transitions. Second operand has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:28,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:46:28,851 INFO L93 Difference]: Finished difference Result 2039 states and 4053 transitions. [2021-03-10 22:46:28,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-03-10 22:46:28,851 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-03-10 22:46:28,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:46:28,854 INFO L225 Difference]: With dead ends: 2039 [2021-03-10 22:46:28,854 INFO L226 Difference]: Without dead ends: 2035 [2021-03-10 22:46:28,856 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23386 ImplicationChecksByTransitivity, 5243.8ms TimeCoverageRelationStatistics Valid=12911, Invalid=42079, Unknown=0, NotChecked=0, Total=54990 [2021-03-10 22:46:28,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-03-10 22:46:28,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 246. [2021-03-10 22:46:28,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0653061224489795) internal successors, (506), 245 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:28,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 506 transitions. [2021-03-10 22:46:28,862 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 506 transitions. Word has length 60 [2021-03-10 22:46:28,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:46:28,862 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 506 transitions. [2021-03-10 22:46:28,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:28,862 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 506 transitions. [2021-03-10 22:46:28,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-03-10 22:46:28,863 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:46:28,863 INFO L519 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:46:29,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 22:46:29,063 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:46:29,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:46:29,063 INFO L82 PathProgramCache]: Analyzing trace with hash 545526321, now seen corresponding path program 34 times [2021-03-10 22:46:29,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:46:29,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732893542] [2021-03-10 22:46:29,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:46:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:46:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:29,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732893542] [2021-03-10 22:46:29,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59048359] [2021-03-10 22:46:29,198 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 [2021-03-10 22:46:29,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:46:29,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:46:29,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 22:46:29,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:46:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:29,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:46:29,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-03-10 22:46:29,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802980339] [2021-03-10 22:46:29,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 22:46:29,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:46:29,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 22:46:29,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:46:29,553 INFO L87 Difference]: Start difference. First operand 246 states and 506 transitions. Second operand has 28 states, 28 states have (on average 4.214285714285714) internal successors, (118), 28 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:29,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:46:29,774 INFO L93 Difference]: Finished difference Result 752 states and 1479 transitions. [2021-03-10 22:46:29,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:46:29,774 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.214285714285714) internal successors, (118), 28 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-03-10 22:46:29,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:46:29,775 INFO L225 Difference]: With dead ends: 752 [2021-03-10 22:46:29,775 INFO L226 Difference]: Without dead ends: 665 [2021-03-10 22:46:29,775 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 305.5ms TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:46:29,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-03-10 22:46:29,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 505. [2021-03-10 22:46:29,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1488095238095237) internal successors, (1083), 504 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:29,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1083 transitions. [2021-03-10 22:46:29,785 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1083 transitions. Word has length 62 [2021-03-10 22:46:29,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:46:29,785 INFO L480 AbstractCegarLoop]: Abstraction has 505 states and 1083 transitions. [2021-03-10 22:46:29,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.214285714285714) internal successors, (118), 28 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:29,785 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1083 transitions. [2021-03-10 22:46:29,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-03-10 22:46:29,786 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:46:29,786 INFO L519 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:46:29,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 22:46:29,992 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:46:29,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:46:29,992 INFO L82 PathProgramCache]: Analyzing trace with hash 387589423, now seen corresponding path program 35 times [2021-03-10 22:46:29,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:46:29,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475964395] [2021-03-10 22:46:29,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:46:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:46:30,361 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:30,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475964395] [2021-03-10 22:46:30,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463639810] [2021-03-10 22:46:30,362 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 [2021-03-10 22:46:30,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-03-10 22:46:30,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:46:30,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:46:30,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:46:31,156 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:31,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:46:31,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 57 [2021-03-10 22:46:31,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990954100] [2021-03-10 22:46:31,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-03-10 22:46:31,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:46:31,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-03-10 22:46:31,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=2723, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 22:46:31,157 INFO L87 Difference]: Start difference. First operand 505 states and 1083 transitions. Second operand has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:38,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:46:38,989 INFO L93 Difference]: Finished difference Result 3594 states and 7071 transitions. [2021-03-10 22:46:38,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2021-03-10 22:46:38,990 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-03-10 22:46:38,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:46:38,993 INFO L225 Difference]: With dead ends: 3594 [2021-03-10 22:46:38,993 INFO L226 Difference]: Without dead ends: 2934 [2021-03-10 22:46:38,995 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31467 ImplicationChecksByTransitivity, 7045.7ms TimeCoverageRelationStatistics Valid=20887, Invalid=56675, Unknown=0, NotChecked=0, Total=77562 [2021-03-10 22:46:38,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-03-10 22:46:39,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 312. [2021-03-10 22:46:39,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.054662379421222) internal successors, (639), 311 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:39,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 639 transitions. [2021-03-10 22:46:39,005 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 639 transitions. Word has length 64 [2021-03-10 22:46:39,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:46:39,005 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 639 transitions. [2021-03-10 22:46:39,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:39,005 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 639 transitions. [2021-03-10 22:46:39,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-03-10 22:46:39,005 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:46:39,006 INFO L519 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:46:39,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-10 22:46:39,207 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:46:39,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:46:39,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1658179955, now seen corresponding path program 36 times [2021-03-10 22:46:39,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:46:39,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546169380] [2021-03-10 22:46:39,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:46:39,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:46:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:39,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546169380] [2021-03-10 22:46:39,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336684096] [2021-03-10 22:46:39,386 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 [2021-03-10 22:46:39,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-03-10 22:46:39,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:46:39,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:46:39,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:46:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:40,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:46:40,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 44 [2021-03-10 22:46:40,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839966602] [2021-03-10 22:46:40,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-03-10 22:46:40,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:46:40,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-03-10 22:46:40,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 22:46:40,123 INFO L87 Difference]: Start difference. First operand 312 states and 639 transitions. Second operand has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:46,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:46:46,976 INFO L93 Difference]: Finished difference Result 2349 states and 4673 transitions. [2021-03-10 22:46:46,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-03-10 22:46:46,977 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-03-10 22:46:46,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:46:46,979 INFO L225 Difference]: With dead ends: 2349 [2021-03-10 22:46:46,979 INFO L226 Difference]: Without dead ends: 2345 [2021-03-10 22:46:46,982 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31046 ImplicationChecksByTransitivity, 6487.1ms TimeCoverageRelationStatistics Valid=16676, Invalid=54346, Unknown=0, NotChecked=0, Total=71022 [2021-03-10 22:46:46,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-03-10 22:46:46,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 264. [2021-03-10 22:46:46,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.068441064638783) internal successors, (544), 263 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:46,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 544 transitions. [2021-03-10 22:46:46,989 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 544 transitions. Word has length 64 [2021-03-10 22:46:46,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:46:46,989 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 544 transitions. [2021-03-10 22:46:46,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:46,989 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 544 transitions. [2021-03-10 22:46:46,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 22:46:46,990 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:46:46,990 INFO L519 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:46:47,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-10 22:46:47,204 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:46:47,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:46:47,205 INFO L82 PathProgramCache]: Analyzing trace with hash -2111435795, now seen corresponding path program 37 times [2021-03-10 22:46:47,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:46:47,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346508654] [2021-03-10 22:46:47,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:46:47,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:46:47,359 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:47,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346508654] [2021-03-10 22:46:47,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685451114] [2021-03-10 22:46:47,359 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) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:46:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:46:47,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 22:46:47,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:46:47,785 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:47,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:46:47,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-03-10 22:46:47,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671067610] [2021-03-10 22:46:47,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 22:46:47,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:46:47,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 22:46:47,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:46:47,787 INFO L87 Difference]: Start difference. First operand 264 states and 544 transitions. Second operand has 30 states, 30 states have (on average 4.2) internal successors, (126), 30 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:48,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:46:48,056 INFO L93 Difference]: Finished difference Result 811 states and 1596 transitions. [2021-03-10 22:46:48,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:46:48,056 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.2) internal successors, (126), 30 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-03-10 22:46:48,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:46:48,057 INFO L225 Difference]: With dead ends: 811 [2021-03-10 22:46:48,057 INFO L226 Difference]: Without dead ends: 718 [2021-03-10 22:46:48,057 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 395.8ms TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:46:48,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-03-10 22:46:48,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 545. [2021-03-10 22:46:48,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 2.150735294117647) internal successors, (1170), 544 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:48,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1170 transitions. [2021-03-10 22:46:48,063 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1170 transitions. Word has length 66 [2021-03-10 22:46:48,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:46:48,063 INFO L480 AbstractCegarLoop]: Abstraction has 545 states and 1170 transitions. [2021-03-10 22:46:48,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.2) internal successors, (126), 30 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:48,063 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1170 transitions. [2021-03-10 22:46:48,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-03-10 22:46:48,063 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:46:48,063 INFO L519 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:46:48,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 22:46:48,275 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:46:48,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:46:48,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1230925803, now seen corresponding path program 38 times [2021-03-10 22:46:48,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:46:48,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596060198] [2021-03-10 22:46:48,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:46:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:46:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:48,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596060198] [2021-03-10 22:46:48,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441353025] [2021-03-10 22:46:48,682 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 [2021-03-10 22:46:48,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:46:48,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:46:48,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:46:48,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:46:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:49,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:46:49,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 61 [2021-03-10 22:46:49,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926049676] [2021-03-10 22:46:49,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-03-10 22:46:49,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:46:49,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-03-10 22:46:49,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=3120, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 22:46:49,575 INFO L87 Difference]: Start difference. First operand 545 states and 1170 transitions. Second operand has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 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) [2021-03-10 22:46:59,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:46:59,488 INFO L93 Difference]: Finished difference Result 4071 states and 8017 transitions. [2021-03-10 22:46:59,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2021-03-10 22:46:59,489 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 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) Word has length 68 [2021-03-10 22:46:59,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:46:59,492 INFO L225 Difference]: With dead ends: 4071 [2021-03-10 22:46:59,492 INFO L226 Difference]: Without dead ends: 3315 [2021-03-10 22:46:59,495 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41086 ImplicationChecksByTransitivity, 8660.1ms TimeCoverageRelationStatistics Valid=26637, Invalid=71645, Unknown=0, NotChecked=0, Total=98282 [2021-03-10 22:46:59,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2021-03-10 22:46:59,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 334. [2021-03-10 22:46:59,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.057057057057057) internal successors, (685), 333 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:59,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 685 transitions. [2021-03-10 22:46:59,506 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 685 transitions. Word has length 68 [2021-03-10 22:46:59,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:46:59,506 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 685 transitions. [2021-03-10 22:46:59,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 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) [2021-03-10 22:46:59,506 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 685 transitions. [2021-03-10 22:46:59,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-03-10 22:46:59,507 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:46:59,507 INFO L519 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:46:59,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:46:59,719 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:46:59,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:46:59,719 INFO L82 PathProgramCache]: Analyzing trace with hash -868702579, now seen corresponding path program 39 times [2021-03-10 22:46:59,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:46:59,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080357343] [2021-03-10 22:46:59,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:46:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:46:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:59,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080357343] [2021-03-10 22:46:59,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158380379] [2021-03-10 22:46:59,919 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 [2021-03-10 22:46:59,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-03-10 22:46:59,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:46:59,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 22:46:59,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:47:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:47:00,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:47:00,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 31] total 47 [2021-03-10 22:47:00,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900843380] [2021-03-10 22:47:00,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-03-10 22:47:00,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:47:00,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-03-10 22:47:00,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1804, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 22:47:00,771 INFO L87 Difference]: Start difference. First operand 334 states and 685 transitions. Second operand has 48 states, 48 states have (on average 2.625) internal successors, (126), 47 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:09,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:47:09,165 INFO L93 Difference]: Finished difference Result 2681 states and 5337 transitions. [2021-03-10 22:47:09,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-03-10 22:47:09,166 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.625) internal successors, (126), 47 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-03-10 22:47:09,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:47:09,168 INFO L225 Difference]: With dead ends: 2681 [2021-03-10 22:47:09,168 INFO L226 Difference]: Without dead ends: 2677 [2021-03-10 22:47:09,171 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40452 ImplicationChecksByTransitivity, 7949.9ms TimeCoverageRelationStatistics Valid=21212, Invalid=69088, Unknown=0, NotChecked=0, Total=90300 [2021-03-10 22:47:09,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-03-10 22:47:09,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 282. [2021-03-10 22:47:09,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.0711743772241995) internal successors, (582), 281 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:09,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 582 transitions. [2021-03-10 22:47:09,180 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 582 transitions. Word has length 68 [2021-03-10 22:47:09,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:47:09,180 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 582 transitions. [2021-03-10 22:47:09,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.625) internal successors, (126), 47 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:09,180 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 582 transitions. [2021-03-10 22:47:09,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-03-10 22:47:09,181 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:47:09,181 INFO L519 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:47:09,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:47:09,396 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:47:09,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:47:09,396 INFO L82 PathProgramCache]: Analyzing trace with hash 880973737, now seen corresponding path program 40 times [2021-03-10 22:47:09,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:47:09,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299749081] [2021-03-10 22:47:09,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:47:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:47:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:47:09,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299749081] [2021-03-10 22:47:09,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694371522] [2021-03-10 22:47:09,583 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 [2021-03-10 22:47:09,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:47:09,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:47:09,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:47:09,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:47:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:47:10,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:47:10,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-03-10 22:47:10,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659801675] [2021-03-10 22:47:10,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 22:47:10,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:47:10,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 22:47:10,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:47:10,042 INFO L87 Difference]: Start difference. First operand 282 states and 582 transitions. Second operand has 32 states, 32 states have (on average 4.1875) internal successors, (134), 32 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:10,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:47:10,294 INFO L93 Difference]: Finished difference Result 870 states and 1713 transitions. [2021-03-10 22:47:10,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:47:10,295 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.1875) internal successors, (134), 32 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-03-10 22:47:10,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:47:10,295 INFO L225 Difference]: With dead ends: 870 [2021-03-10 22:47:10,295 INFO L226 Difference]: Without dead ends: 771 [2021-03-10 22:47:10,296 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 436.1ms TimeCoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:47:10,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-03-10 22:47:10,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 585. [2021-03-10 22:47:10,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.1523972602739727) internal successors, (1257), 584 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:10,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1257 transitions. [2021-03-10 22:47:10,301 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1257 transitions. Word has length 70 [2021-03-10 22:47:10,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:47:10,301 INFO L480 AbstractCegarLoop]: Abstraction has 585 states and 1257 transitions. [2021-03-10 22:47:10,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 4.1875) internal successors, (134), 32 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:10,301 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1257 transitions. [2021-03-10 22:47:10,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-03-10 22:47:10,302 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:47:10,302 INFO L519 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:47:10,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-03-10 22:47:10,517 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:47:10,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:47:10,517 INFO L82 PathProgramCache]: Analyzing trace with hash 550292647, now seen corresponding path program 41 times [2021-03-10 22:47:10,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:47:10,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756698099] [2021-03-10 22:47:10,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:47:10,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:47:11,013 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:47:11,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756698099] [2021-03-10 22:47:11,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726809844] [2021-03-10 22:47:11,014 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 [2021-03-10 22:47:11,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-03-10 22:47:11,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:47:11,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:47:11,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:47:12,106 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:47:12,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:47:12,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 65 [2021-03-10 22:47:12,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663130876] [2021-03-10 22:47:12,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-03-10 22:47:12,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:47:12,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-03-10 22:47:12,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=3544, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 22:47:12,107 INFO L87 Difference]: Start difference. First operand 585 states and 1257 transitions. Second operand has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:24,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:47:24,440 INFO L93 Difference]: Finished difference Result 4576 states and 9019 transitions. [2021-03-10 22:47:24,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 289 states. [2021-03-10 22:47:24,441 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-03-10 22:47:24,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:47:24,444 INFO L225 Difference]: With dead ends: 4576 [2021-03-10 22:47:24,444 INFO L226 Difference]: Without dead ends: 3718 [2021-03-10 22:47:24,448 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52776 ImplicationChecksByTransitivity, 10850.3ms TimeCoverageRelationStatistics Valid=33504, Invalid=89346, Unknown=0, NotChecked=0, Total=122850 [2021-03-10 22:47:24,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2021-03-10 22:47:24,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 356. [2021-03-10 22:47:24,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.0591549295774647) internal successors, (731), 355 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:24,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 731 transitions. [2021-03-10 22:47:24,460 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 731 transitions. Word has length 72 [2021-03-10 22:47:24,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:47:24,460 INFO L480 AbstractCegarLoop]: Abstraction has 356 states and 731 transitions. [2021-03-10 22:47:24,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:24,461 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 731 transitions. [2021-03-10 22:47:24,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-03-10 22:47:24,461 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:47:24,461 INFO L519 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:47:24,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:47:24,671 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:47:24,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:47:24,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1768231027, now seen corresponding path program 42 times [2021-03-10 22:47:24,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:47:24,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873481764] [2021-03-10 22:47:24,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:47:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:47:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:47:24,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873481764] [2021-03-10 22:47:24,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708862030] [2021-03-10 22:47:24,942 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 [2021-03-10 22:47:24,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-03-10 22:47:24,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:47:24,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:47:24,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:47:25,953 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:47:25,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:47:25,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33] total 50 [2021-03-10 22:47:25,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679901730] [2021-03-10 22:47:25,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-03-10 22:47:25,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:47:25,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-03-10 22:47:25,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=2044, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 22:47:25,954 INFO L87 Difference]: Start difference. First operand 356 states and 731 transitions. Second operand has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:36,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:47:36,507 INFO L93 Difference]: Finished difference Result 3035 states and 6045 transitions. [2021-03-10 22:47:36,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2021-03-10 22:47:36,508 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-03-10 22:47:36,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:47:36,510 INFO L225 Difference]: With dead ends: 3035 [2021-03-10 22:47:36,510 INFO L226 Difference]: Without dead ends: 3031 [2021-03-10 22:47:36,514 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51852 ImplicationChecksByTransitivity, 9991.9ms TimeCoverageRelationStatistics Valid=26618, Invalid=86614, Unknown=0, NotChecked=0, Total=113232 [2021-03-10 22:47:36,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3031 states. [2021-03-10 22:47:36,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3031 to 300. [2021-03-10 22:47:36,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.0735785953177257) internal successors, (620), 299 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:36,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 620 transitions. [2021-03-10 22:47:36,523 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 620 transitions. Word has length 72 [2021-03-10 22:47:36,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:47:36,523 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 620 transitions. [2021-03-10 22:47:36,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:36,523 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 620 transitions. [2021-03-10 22:47:36,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-03-10 22:47:36,524 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:47:36,524 INFO L519 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:47:36,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:47:36,724 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:47:36,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:47:36,724 INFO L82 PathProgramCache]: Analyzing trace with hash -372460187, now seen corresponding path program 43 times [2021-03-10 22:47:36,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:47:36,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285877054] [2021-03-10 22:47:36,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:47:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:47:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:47:36,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285877054] [2021-03-10 22:47:36,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265007189] [2021-03-10 22:47:36,926 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:47:36,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:47:36,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:47:36,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:47:37,477 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:47:37,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:47:37,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 34 [2021-03-10 22:47:37,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804838626] [2021-03-10 22:47:37,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 22:47:37,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:47:37,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 22:47:37,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:47:37,478 INFO L87 Difference]: Start difference. First operand 300 states and 620 transitions. Second operand has 34 states, 34 states have (on average 4.176470588235294) internal successors, (142), 34 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:37,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:47:37,807 INFO L93 Difference]: Finished difference Result 929 states and 1830 transitions. [2021-03-10 22:47:37,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:47:37,808 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.176470588235294) internal successors, (142), 34 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-03-10 22:47:37,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:47:37,808 INFO L225 Difference]: With dead ends: 929 [2021-03-10 22:47:37,808 INFO L226 Difference]: Without dead ends: 824 [2021-03-10 22:47:37,809 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 527.1ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:47:37,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-03-10 22:47:37,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 625. [2021-03-10 22:47:37,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.1538461538461537) internal successors, (1344), 624 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:37,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1344 transitions. [2021-03-10 22:47:37,814 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1344 transitions. Word has length 74 [2021-03-10 22:47:37,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:47:37,814 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 1344 transitions. [2021-03-10 22:47:37,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 4.176470588235294) internal successors, (142), 34 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:37,814 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1344 transitions. [2021-03-10 22:47:37,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:47:37,815 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:47:37,815 INFO L519 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:47:38,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-03-10 22:47:38,023 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:47:38,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:47:38,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1948763293, now seen corresponding path program 44 times [2021-03-10 22:47:38,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:47:38,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193180984] [2021-03-10 22:47:38,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:47:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:47:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:47:38,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193180984] [2021-03-10 22:47:38,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878713820] [2021-03-10 22:47:38,577 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:47:38,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:47:38,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:47:38,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 22:47:38,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:47:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:47:39,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:47:39,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 69 [2021-03-10 22:47:39,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099841620] [2021-03-10 22:47:39,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-03-10 22:47:39,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:47:39,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-03-10 22:47:39,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=3995, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 22:47:39,813 INFO L87 Difference]: Start difference. First operand 625 states and 1344 transitions. Second operand has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:55,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:47:55,574 INFO L93 Difference]: Finished difference Result 5109 states and 10077 transitions. [2021-03-10 22:47:55,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2021-03-10 22:47:55,575 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-03-10 22:47:55,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:47:55,578 INFO L225 Difference]: With dead ends: 5109 [2021-03-10 22:47:55,578 INFO L226 Difference]: Without dead ends: 4143 [2021-03-10 22:47:55,583 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66817 ImplicationChecksByTransitivity, 13639.0ms TimeCoverageRelationStatistics Valid=41625, Invalid=110085, Unknown=0, NotChecked=0, Total=151710 [2021-03-10 22:47:55,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2021-03-10 22:47:55,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 378. [2021-03-10 22:47:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.061007957559682) internal successors, (777), 377 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:55,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 777 transitions. [2021-03-10 22:47:55,594 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 777 transitions. Word has length 76 [2021-03-10 22:47:55,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:47:55,594 INFO L480 AbstractCegarLoop]: Abstraction has 378 states and 777 transitions. [2021-03-10 22:47:55,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:55,595 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 777 transitions. [2021-03-10 22:47:55,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:47:55,595 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:47:55,595 INFO L519 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:47:55,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-03-10 22:47:55,809 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:47:55,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:47:55,809 INFO L82 PathProgramCache]: Analyzing trace with hash 122702221, now seen corresponding path program 45 times [2021-03-10 22:47:55,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:47:55,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648080774] [2021-03-10 22:47:55,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:47:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:47:56,098 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:47:56,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648080774] [2021-03-10 22:47:56,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308959100] [2021-03-10 22:47:56,098 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:47:56,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-03-10 22:47:56,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:47:56,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 22:47:56,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:47:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:47:57,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:47:57,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35] total 53 [2021-03-10 22:47:57,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598517698] [2021-03-10 22:47:57,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-03-10 22:47:57,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:47:57,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-03-10 22:47:57,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=2299, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 22:47:57,353 INFO L87 Difference]: Start difference. First operand 378 states and 777 transitions. Second operand has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:48:11,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:48:11,356 INFO L93 Difference]: Finished difference Result 3411 states and 6797 transitions. [2021-03-10 22:48:11,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2021-03-10 22:48:11,357 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-03-10 22:48:11,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:48:11,373 INFO L225 Difference]: With dead ends: 3411 [2021-03-10 22:48:11,373 INFO L226 Difference]: Without dead ends: 3407 [2021-03-10 22:48:11,377 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 373 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65510 ImplicationChecksByTransitivity, 13103.5ms TimeCoverageRelationStatistics Valid=32999, Invalid=107251, Unknown=0, NotChecked=0, Total=140250 [2021-03-10 22:48:11,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2021-03-10 22:48:11,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 318. [2021-03-10 22:48:11,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.0757097791798107) internal successors, (658), 317 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:48:11,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 658 transitions. [2021-03-10 22:48:11,387 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 658 transitions. Word has length 76 [2021-03-10 22:48:11,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:48:11,388 INFO L480 AbstractCegarLoop]: Abstraction has 318 states and 658 transitions. [2021-03-10 22:48:11,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:48:11,388 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 658 transitions. [2021-03-10 22:48:11,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-03-10 22:48:11,388 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:48:11,388 INFO L519 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:48:11,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-03-10 22:48:11,595 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:48:11,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:48:11,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1078500063, now seen corresponding path program 46 times [2021-03-10 22:48:11,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:48:11,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677998976] [2021-03-10 22:48:11,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:48:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:48:11,865 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:48:11,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677998976] [2021-03-10 22:48:11,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205165351] [2021-03-10 22:48:11,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:48:11,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:48:11,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:48:11,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 22:48:11,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:48:12,538 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:48:12,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:48:12,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 36 [2021-03-10 22:48:12,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083707570] [2021-03-10 22:48:12,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 22:48:12,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:48:12,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 22:48:12,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:48:12,539 INFO L87 Difference]: Start difference. First operand 318 states and 658 transitions. Second operand has 36 states, 36 states have (on average 4.166666666666667) internal successors, (150), 36 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:48:13,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:48:13,050 INFO L93 Difference]: Finished difference Result 988 states and 1947 transitions. [2021-03-10 22:48:13,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:48:13,051 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.166666666666667) internal successors, (150), 36 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-03-10 22:48:13,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:48:13,052 INFO L225 Difference]: With dead ends: 988 [2021-03-10 22:48:13,052 INFO L226 Difference]: Without dead ends: 877 [2021-03-10 22:48:13,052 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 669.2ms TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:48:13,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-03-10 22:48:13,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 665. [2021-03-10 22:48:13,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.1551204819277108) internal successors, (1431), 664 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:48:13,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1431 transitions. [2021-03-10 22:48:13,058 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1431 transitions. Word has length 78 [2021-03-10 22:48:13,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:48:13,058 INFO L480 AbstractCegarLoop]: Abstraction has 665 states and 1431 transitions. [2021-03-10 22:48:13,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.166666666666667) internal successors, (150), 36 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:48:13,058 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1431 transitions. [2021-03-10 22:48:13,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-03-10 22:48:13,058 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:48:13,058 INFO L519 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:48:13,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:48:13,259 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:48:13,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:48:13,259 INFO L82 PathProgramCache]: Analyzing trace with hash -999048161, now seen corresponding path program 47 times [2021-03-10 22:48:13,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:48:13,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588817707] [2021-03-10 22:48:13,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:48:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:48:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:48:14,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588817707] [2021-03-10 22:48:14,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429262897] [2021-03-10 22:48:14,022 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:48:14,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-03-10 22:48:14,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:48:14,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:48:14,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:48:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:48:15,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:48:15,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 73 [2021-03-10 22:48:15,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823569069] [2021-03-10 22:48:15,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-03-10 22:48:15,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:48:15,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-03-10 22:48:15,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=4473, Unknown=0, NotChecked=0, Total=5402 [2021-03-10 22:48:15,620 INFO L87 Difference]: Start difference. First operand 665 states and 1431 transitions. Second operand has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:48:36,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:48:36,676 INFO L93 Difference]: Finished difference Result 5670 states and 11191 transitions. [2021-03-10 22:48:36,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 361 states. [2021-03-10 22:48:36,679 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-03-10 22:48:36,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:48:36,683 INFO L225 Difference]: With dead ends: 5670 [2021-03-10 22:48:36,683 INFO L226 Difference]: Without dead ends: 4590 [2021-03-10 22:48:36,689 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 429 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83508 ImplicationChecksByTransitivity, 19016.8ms TimeCoverageRelationStatistics Valid=51145, Invalid=134185, Unknown=0, NotChecked=0, Total=185330 [2021-03-10 22:48:36,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4590 states. [2021-03-10 22:48:36,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4590 to 400. [2021-03-10 22:48:36,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.06265664160401) internal successors, (823), 399 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:48:36,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 823 transitions. [2021-03-10 22:48:36,702 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 823 transitions. Word has length 80 [2021-03-10 22:48:36,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:48:36,702 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 823 transitions. [2021-03-10 22:48:36,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:48:36,702 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 823 transitions. [2021-03-10 22:48:36,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-03-10 22:48:36,702 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:48:36,703 INFO L519 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:48:36,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-10 22:48:36,903 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:48:36,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:48:36,903 INFO L82 PathProgramCache]: Analyzing trace with hash -2100824947, now seen corresponding path program 48 times [2021-03-10 22:48:36,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:48:36,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914685899] [2021-03-10 22:48:36,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:48:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:48:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:48:37,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914685899] [2021-03-10 22:48:37,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015740714] [2021-03-10 22:48:37,307 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:48:37,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-03-10 22:48:37,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:48:37,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:48:37,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:48:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:48:39,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:48:39,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 37] total 56 [2021-03-10 22:48:39,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097488378] [2021-03-10 22:48:39,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-03-10 22:48:39,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:48:39,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-03-10 22:48:39,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=2569, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 22:48:39,038 INFO L87 Difference]: Start difference. First operand 400 states and 823 transitions. Second operand has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:48:58,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:48:58,996 INFO L93 Difference]: Finished difference Result 3809 states and 7593 transitions. [2021-03-10 22:48:58,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 362 states. [2021-03-10 22:48:58,997 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-03-10 22:48:58,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:48:59,000 INFO L225 Difference]: With dead ends: 3809 [2021-03-10 22:48:59,000 INFO L226 Difference]: Without dead ends: 3805 [2021-03-10 22:48:59,007 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81707 ImplicationChecksByTransitivity, 19016.4ms TimeCoverageRelationStatistics Valid=40466, Invalid=131344, Unknown=0, NotChecked=0, Total=171810 [2021-03-10 22:48:59,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-03-10 22:48:59,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 336. [2021-03-10 22:48:59,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.0776119402985076) internal successors, (696), 335 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:48:59,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 696 transitions. [2021-03-10 22:48:59,017 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 696 transitions. Word has length 80 [2021-03-10 22:48:59,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:48:59,017 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 696 transitions. [2021-03-10 22:48:59,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:48:59,017 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 696 transitions. [2021-03-10 22:48:59,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-03-10 22:48:59,018 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:48:59,018 INFO L519 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:48:59,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:48:59,218 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:48:59,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:48:59,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1064675037, now seen corresponding path program 49 times [2021-03-10 22:48:59,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:48:59,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703512924] [2021-03-10 22:48:59,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:48:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:48:59,583 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:48:59,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703512924] [2021-03-10 22:48:59,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716959900] [2021-03-10 22:48:59,584 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:48:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:48:59,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:48:59,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:49:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:49:00,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:49:00,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 38 [2021-03-10 22:49:00,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917912791] [2021-03-10 22:49:00,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-03-10 22:49:00,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:49:00,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-03-10 22:49:00,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1009, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:49:00,610 INFO L87 Difference]: Start difference. First operand 336 states and 696 transitions. Second operand has 38 states, 38 states have (on average 4.157894736842105) internal successors, (158), 38 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:49:01,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:49:01,283 INFO L93 Difference]: Finished difference Result 1047 states and 2064 transitions. [2021-03-10 22:49:01,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:49:01,285 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.157894736842105) internal successors, (158), 38 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-03-10 22:49:01,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:49:01,286 INFO L225 Difference]: With dead ends: 1047 [2021-03-10 22:49:01,286 INFO L226 Difference]: Without dead ends: 930 [2021-03-10 22:49:01,286 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 964.4ms TimeCoverageRelationStatistics Valid=397, Invalid=1009, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:49:01,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-03-10 22:49:01,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 705. [2021-03-10 22:49:01,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 2.15625) internal successors, (1518), 704 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:49:01,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1518 transitions. [2021-03-10 22:49:01,292 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1518 transitions. Word has length 82 [2021-03-10 22:49:01,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:49:01,292 INFO L480 AbstractCegarLoop]: Abstraction has 705 states and 1518 transitions. [2021-03-10 22:49:01,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 4.157894736842105) internal successors, (158), 38 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:49:01,292 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1518 transitions. [2021-03-10 22:49:01,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-03-10 22:49:01,293 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:49:01,293 INFO L519 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:49:01,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:49:01,507 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:49:01,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:49:01,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1343377115, now seen corresponding path program 50 times [2021-03-10 22:49:01,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:49:01,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795932320] [2021-03-10 22:49:01,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:49:01,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:49:02,602 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:49:02,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795932320] [2021-03-10 22:49:02,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461940571] [2021-03-10 22:49:02,602 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:49:02,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:49:02,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:49:02,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:49:02,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:49:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:49:05,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:49:05,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 77 [2021-03-10 22:49:05,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378272005] [2021-03-10 22:49:05,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-03-10 22:49:05,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:49:05,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-03-10 22:49:05,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1028, Invalid=4978, Unknown=0, NotChecked=0, Total=6006 [2021-03-10 22:49:05,064 INFO L87 Difference]: Start difference. First operand 705 states and 1518 transitions. Second operand has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:49:35,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:49:35,870 INFO L93 Difference]: Finished difference Result 6259 states and 12361 transitions. [2021-03-10 22:49:35,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 400 states. [2021-03-10 22:49:35,872 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-03-10 22:49:35,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:49:35,876 INFO L225 Difference]: With dead ends: 6259 [2021-03-10 22:49:35,876 INFO L226 Difference]: Without dead ends: 5059 [2021-03-10 22:49:35,884 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 472 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103165 ImplicationChecksByTransitivity, 26937.8ms TimeCoverageRelationStatistics Valid=62217, Invalid=161985, Unknown=0, NotChecked=0, Total=224202 [2021-03-10 22:49:35,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5059 states. [2021-03-10 22:49:35,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5059 to 422. [2021-03-10 22:49:35,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.0641330166270784) internal successors, (869), 421 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:49:35,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 869 transitions. [2021-03-10 22:49:35,897 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 869 transitions. Word has length 84 [2021-03-10 22:49:35,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:49:35,897 INFO L480 AbstractCegarLoop]: Abstraction has 422 states and 869 transitions. [2021-03-10 22:49:35,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:49:35,898 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 869 transitions. [2021-03-10 22:49:35,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-03-10 22:49:35,898 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:49:35,898 INFO L519 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:49:36,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-03-10 22:49:36,099 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:49:36,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:49:36,099 INFO L82 PathProgramCache]: Analyzing trace with hash 182530189, now seen corresponding path program 51 times [2021-03-10 22:49:36,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:49:36,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215530938] [2021-03-10 22:49:36,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:49:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:49:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:49:36,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215530938] [2021-03-10 22:49:36,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567509603] [2021-03-10 22:49:36,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:49:36,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-03-10 22:49:36,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:49:36,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 22:49:36,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:49:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:49:39,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:49:39,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39] total 59 [2021-03-10 22:49:39,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447021630] [2021-03-10 22:49:39,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-03-10 22:49:39,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:49:39,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-03-10 22:49:39,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=2854, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 22:49:39,012 INFO L87 Difference]: Start difference. First operand 422 states and 869 transitions. Second operand has 60 states, 60 states have (on average 2.6333333333333333) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:50:09,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:50:09,179 INFO L93 Difference]: Finished difference Result 4229 states and 8433 transitions. [2021-03-10 22:50:09,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 401 states. [2021-03-10 22:50:09,181 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.6333333333333333) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-03-10 22:50:09,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:50:09,185 INFO L225 Difference]: With dead ends: 4229 [2021-03-10 22:50:09,185 INFO L226 Difference]: Without dead ends: 4225 [2021-03-10 22:50:09,193 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 455 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100740 ImplicationChecksByTransitivity, 28035.2ms TimeCoverageRelationStatistics Valid=49136, Invalid=159256, Unknown=0, NotChecked=0, Total=208392 [2021-03-10 22:50:09,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2021-03-10 22:50:09,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 354. [2021-03-10 22:50:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.0793201133144477) internal successors, (734), 353 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:50:09,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 734 transitions. [2021-03-10 22:50:09,205 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 734 transitions. Word has length 84 [2021-03-10 22:50:09,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:50:09,205 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 734 transitions. [2021-03-10 22:50:09,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.6333333333333333) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:50:09,206 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 734 transitions. [2021-03-10 22:50:09,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-03-10 22:50:09,206 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:50:09,206 INFO L519 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:50:09,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:50:09,407 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:50:09,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:50:09,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1572502169, now seen corresponding path program 52 times [2021-03-10 22:50:09,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:50:09,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696452972] [2021-03-10 22:50:09,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:50:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:50:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:50:09,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696452972] [2021-03-10 22:50:09,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989212256] [2021-03-10 22:50:09,972 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:50:10,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:50:10,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:50:10,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 22:50:10,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:50:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:50:11,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:50:11,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-03-10 22:50:11,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85128901] [2021-03-10 22:50:11,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-03-10 22:50:11,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:50:11,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-03-10 22:50:11,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=1122, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:50:11,499 INFO L87 Difference]: Start difference. First operand 354 states and 734 transitions. Second operand has 40 states, 40 states have (on average 4.15) internal successors, (166), 40 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:50:12,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:50:12,645 INFO L93 Difference]: Finished difference Result 1106 states and 2181 transitions. [2021-03-10 22:50:12,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:50:12,647 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.15) internal successors, (166), 40 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-03-10 22:50:12,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:50:12,648 INFO L225 Difference]: With dead ends: 1106 [2021-03-10 22:50:12,648 INFO L226 Difference]: Without dead ends: 983 [2021-03-10 22:50:12,648 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1485.1ms TimeCoverageRelationStatistics Valid=438, Invalid=1122, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:50:12,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-03-10 22:50:12,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 745. [2021-03-10 22:50:12,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 2.157258064516129) internal successors, (1605), 744 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:50:12,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1605 transitions. [2021-03-10 22:50:12,655 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1605 transitions. Word has length 86 [2021-03-10 22:50:12,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:50:12,655 INFO L480 AbstractCegarLoop]: Abstraction has 745 states and 1605 transitions. [2021-03-10 22:50:12,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 4.15) internal successors, (166), 40 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:50:12,655 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1605 transitions. [2021-03-10 22:50:12,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-03-10 22:50:12,655 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:50:12,656 INFO L519 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:50:12,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-03-10 22:50:12,856 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:50:12,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:50:12,856 INFO L82 PathProgramCache]: Analyzing trace with hash -5835881, now seen corresponding path program 53 times [2021-03-10 22:50:12,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:50:12,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111634421] [2021-03-10 22:50:12,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:50:12,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:50:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:50:14,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111634421] [2021-03-10 22:50:14,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368572487] [2021-03-10 22:50:14,287 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:50:14,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-03-10 22:50:14,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:50:14,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 22:50:14,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:50:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:50:17,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:50:17,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 81 [2021-03-10 22:50:17,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568198652] [2021-03-10 22:50:17,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-03-10 22:50:17,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:50:17,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-03-10 22:50:17,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=5510, Unknown=0, NotChecked=0, Total=6642 [2021-03-10 22:50:17,829 INFO L87 Difference]: Start difference. First operand 745 states and 1605 transitions. Second operand has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:51:05,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:51:05,744 INFO L93 Difference]: Finished difference Result 6876 states and 13587 transitions. [2021-03-10 22:51:05,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 441 states. [2021-03-10 22:51:05,746 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-03-10 22:51:05,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:51:05,750 INFO L225 Difference]: With dead ends: 6876 [2021-03-10 22:51:05,751 INFO L226 Difference]: Without dead ends: 5550 [2021-03-10 22:51:05,760 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 517 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126123 ImplicationChecksByTransitivity, 43479.4ms TimeCoverageRelationStatistics Valid=75002, Invalid=193840, Unknown=0, NotChecked=0, Total=268842 [2021-03-10 22:51:05,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5550 states. [2021-03-10 22:51:05,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5550 to 444. [2021-03-10 22:51:05,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.0654627539503387) internal successors, (915), 443 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:51:05,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 915 transitions. [2021-03-10 22:51:05,776 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 915 transitions. Word has length 88 [2021-03-10 22:51:05,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:51:05,776 INFO L480 AbstractCegarLoop]: Abstraction has 444 states and 915 transitions. [2021-03-10 22:51:05,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:51:05,776 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 915 transitions. [2021-03-10 22:51:05,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-03-10 22:51:05,777 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:51:05,777 INFO L519 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:51:05,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-03-10 22:51:05,991 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:51:05,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:51:05,992 INFO L82 PathProgramCache]: Analyzing trace with hash -2098512499, now seen corresponding path program 54 times [2021-03-10 22:51:05,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:51:05,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516262984] [2021-03-10 22:51:05,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:51:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:51:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:51:06,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516262984] [2021-03-10 22:51:06,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428260783] [2021-03-10 22:51:06,821 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:51:06,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-03-10 22:51:06,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:51:06,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 22:51:06,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:51:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:51:10,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:51:10,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2021-03-10 22:51:10,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88656417] [2021-03-10 22:51:10,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-03-10 22:51:10,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:51:10,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-03-10 22:51:10,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=752, Invalid=3154, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 22:51:10,916 INFO L87 Difference]: Start difference. First operand 444 states and 915 transitions. Second operand has 63 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:02,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:02,088 INFO L93 Difference]: Finished difference Result 4671 states and 9317 transitions. [2021-03-10 22:52:02,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 442 states. [2021-03-10 22:52:02,091 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-03-10 22:52:02,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:02,095 INFO L225 Difference]: With dead ends: 4671 [2021-03-10 22:52:02,095 INFO L226 Difference]: Without dead ends: 4667 [2021-03-10 22:52:02,105 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 499 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122923 ImplicationChecksByTransitivity, 47843.1ms TimeCoverageRelationStatistics Valid=59132, Invalid=191368, Unknown=0, NotChecked=0, Total=250500 [2021-03-10 22:52:02,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2021-03-10 22:52:02,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 372. [2021-03-10 22:52:02,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.0808625336927222) internal successors, (772), 371 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:02,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 772 transitions. [2021-03-10 22:52:02,120 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 772 transitions. Word has length 88 [2021-03-10 22:52:02,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:02,120 INFO L480 AbstractCegarLoop]: Abstraction has 372 states and 772 transitions. [2021-03-10 22:52:02,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:02,122 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 772 transitions. [2021-03-10 22:52:02,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-03-10 22:52:02,122 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:02,122 INFO L519 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:02,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:02,335 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:02,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:02,335 INFO L82 PathProgramCache]: Analyzing trace with hash 2058936405, now seen corresponding path program 55 times [2021-03-10 22:52:02,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:02,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817409310] [2021-03-10 22:52:02,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:03,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817409310] [2021-03-10 22:52:03,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707123287] [2021-03-10 22:52:03,216 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:03,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 42 conjunts are in the unsatisfiable core [2021-03-10 22:52:03,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:05,509 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:05,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:05,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2021-03-10 22:52:05,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350584043] [2021-03-10 22:52:05,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-03-10 22:52:05,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:05,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-03-10 22:52:05,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1241, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:52:05,510 INFO L87 Difference]: Start difference. First operand 372 states and 772 transitions. Second operand has 42 states, 42 states have (on average 4.142857142857143) internal successors, (174), 42 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) [2021-03-10 22:52:07,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:07,021 INFO L93 Difference]: Finished difference Result 1165 states and 2298 transitions. [2021-03-10 22:52:07,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:52:07,023 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.142857142857143) internal successors, (174), 42 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) Word has length 90 [2021-03-10 22:52:07,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:07,024 INFO L225 Difference]: With dead ends: 1165 [2021-03-10 22:52:07,024 INFO L226 Difference]: Without dead ends: 1036 [2021-03-10 22:52:07,025 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2289.2ms TimeCoverageRelationStatistics Valid=481, Invalid=1241, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:52:07,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-03-10 22:52:07,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 785. [2021-03-10 22:52:07,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.1581632653061225) internal successors, (1692), 784 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:07,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1692 transitions. [2021-03-10 22:52:07,031 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1692 transitions. Word has length 90 [2021-03-10 22:52:07,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:07,031 INFO L480 AbstractCegarLoop]: Abstraction has 785 states and 1692 transitions. [2021-03-10 22:52:07,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 4.142857142857143) internal successors, (174), 42 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) [2021-03-10 22:52:07,031 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1692 transitions. [2021-03-10 22:52:07,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-03-10 22:52:07,032 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:07,032 INFO L519 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:07,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-03-10 22:52:07,232 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:07,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:07,233 INFO L82 PathProgramCache]: Analyzing trace with hash -274421165, now seen corresponding path program 56 times [2021-03-10 22:52:07,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:07,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991687462] [2021-03-10 22:52:07,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:09,402 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:09,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991687462] [2021-03-10 22:52:09,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989282051] [2021-03-10 22:52:09,403 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:09,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:52:09,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:09,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 22:52:09,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:14,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:14,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 85 [2021-03-10 22:52:14,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71895604] [2021-03-10 22:52:14,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-03-10 22:52:14,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:14,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-03-10 22:52:14,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1241, Invalid=6069, Unknown=0, NotChecked=0, Total=7310 [2021-03-10 22:52:14,911 INFO L87 Difference]: Start difference. First operand 785 states and 1692 transitions. Second operand has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:26,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:53:26,610 INFO L93 Difference]: Finished difference Result 7521 states and 14869 transitions. [2021-03-10 22:53:26,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 484 states. [2021-03-10 22:53:26,613 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-03-10 22:53:26,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:53:26,618 INFO L225 Difference]: With dead ends: 7521 [2021-03-10 22:53:26,618 INFO L226 Difference]: Without dead ends: 6063 [2021-03-10 22:53:26,629 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 564 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152734 ImplicationChecksByTransitivity, 64603.4ms TimeCoverageRelationStatistics Valid=89669, Invalid=230121, Unknown=0, NotChecked=0, Total=319790 [2021-03-10 22:53:26,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2021-03-10 22:53:26,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 466. [2021-03-10 22:53:26,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.066666666666667) internal successors, (961), 465 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:26,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 961 transitions. [2021-03-10 22:53:26,646 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 961 transitions. Word has length 92 [2021-03-10 22:53:26,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:53:26,646 INFO L480 AbstractCegarLoop]: Abstraction has 466 states and 961 transitions. [2021-03-10 22:53:26,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:26,646 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 961 transitions. [2021-03-10 22:53:26,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-03-10 22:53:26,647 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:53:26,647 INFO L519 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:53:26,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:53:26,862 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:53:26,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:53:26,862 INFO L82 PathProgramCache]: Analyzing trace with hash -207266931, now seen corresponding path program 57 times [2021-03-10 22:53:26,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:53:26,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533059352] [2021-03-10 22:53:26,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:53:26,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:53:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:53:27,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533059352] [2021-03-10 22:53:27,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614667485] [2021-03-10 22:53:27,968 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:53:28,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-03-10 22:53:28,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:53:28,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 22:53:28,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:53:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:53:34,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:53:34,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 43] total 65 [2021-03-10 22:53:34,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416908178] [2021-03-10 22:53:34,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-03-10 22:53:34,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:53:34,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-03-10 22:53:34,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=3469, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 22:53:34,066 INFO L87 Difference]: Start difference. First operand 466 states and 961 transitions. Second operand has 66 states, 66 states have (on average 2.6363636363636362) internal successors, (174), 65 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) [2021-03-10 22:54:48,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:54:48,568 INFO L93 Difference]: Finished difference Result 5135 states and 10245 transitions. [2021-03-10 22:54:48,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 485 states. [2021-03-10 22:54:48,573 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.6363636363636362) internal successors, (174), 65 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) Word has length 92 [2021-03-10 22:54:48,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:54:48,577 INFO L225 Difference]: With dead ends: 5135 [2021-03-10 22:54:48,577 INFO L226 Difference]: Without dead ends: 5131 [2021-03-10 22:54:48,591 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 545 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148586 ImplicationChecksByTransitivity, 70796.4ms TimeCoverageRelationStatistics Valid=70583, Invalid=228079, Unknown=0, NotChecked=0, Total=298662 [2021-03-10 22:54:48,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5131 states. [2021-03-10 22:54:48,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5131 to 390. [2021-03-10 22:54:48,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.082262210796915) internal successors, (810), 389 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:54:48,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 810 transitions. [2021-03-10 22:54:48,605 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 810 transitions. Word has length 92 [2021-03-10 22:54:48,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:54:48,605 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 810 transitions. [2021-03-10 22:54:48,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.6363636363636362) internal successors, (174), 65 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) [2021-03-10 22:54:48,605 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 810 transitions. [2021-03-10 22:54:48,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-03-10 22:54:48,605 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:54:48,605 INFO L519 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:54:48,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-03-10 22:54:48,806 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:54:48,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:54:48,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1646516241, now seen corresponding path program 58 times [2021-03-10 22:54:48,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:54:48,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073178218] [2021-03-10 22:54:48,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:54:48,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:54:50,140 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:54:50,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073178218] [2021-03-10 22:54:50,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929322655] [2021-03-10 22:54:50,141 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:54:50,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:54:50,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:54:50,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 44 conjunts are in the unsatisfiable core [2021-03-10 22:54:50,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:54:53,880 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:54:53,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:54:53,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 44 [2021-03-10 22:54:53,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543097698] [2021-03-10 22:54:53,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-03-10 22:54:53,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:54:53,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-03-10 22:54:53,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1366, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 22:54:53,881 INFO L87 Difference]: Start difference. First operand 390 states and 810 transitions. Second operand has 44 states, 44 states have (on average 4.136363636363637) internal successors, (182), 44 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:54:56,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:54:56,330 INFO L93 Difference]: Finished difference Result 1224 states and 2415 transitions. [2021-03-10 22:54:56,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:54:56,334 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.136363636363637) internal successors, (182), 44 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-03-10 22:54:56,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:54:56,335 INFO L225 Difference]: With dead ends: 1224 [2021-03-10 22:54:56,335 INFO L226 Difference]: Without dead ends: 1089 [2021-03-10 22:54:56,335 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 3684.9ms TimeCoverageRelationStatistics Valid=526, Invalid=1366, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 22:54:56,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-03-10 22:54:56,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 825. [2021-03-10 22:54:56,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.158980582524272) internal successors, (1779), 824 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:54:56,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1779 transitions. [2021-03-10 22:54:56,342 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1779 transitions. Word has length 94 [2021-03-10 22:54:56,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:54:56,342 INFO L480 AbstractCegarLoop]: Abstraction has 825 states and 1779 transitions. [2021-03-10 22:54:56,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 4.136363636363637) internal successors, (182), 44 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:54:56,342 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1779 transitions. [2021-03-10 22:54:56,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:54:56,343 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:54:56,343 INFO L519 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:54:56,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:54:56,551 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:54:56,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:54:56,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2013367537, now seen corresponding path program 59 times [2021-03-10 22:54:56,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:54:56,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884423012] [2021-03-10 22:54:56,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:54:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:54:59,934 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:54:59,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884423012] [2021-03-10 22:54:59,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556006910] [2021-03-10 22:54:59,935 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:54:59,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-03-10 22:54:59,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:54:59,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 22:54:59,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:55:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:55:09,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:55:09,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 89 [2021-03-10 22:55:09,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407383335] [2021-03-10 22:55:09,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-03-10 22:55:09,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:55:09,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-03-10 22:55:09,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=6655, Unknown=0, NotChecked=0, Total=8010 [2021-03-10 22:55:09,213 INFO L87 Difference]: Start difference. First operand 825 states and 1779 transitions. Second operand has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:11,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:57:11,860 INFO L93 Difference]: Finished difference Result 8194 states and 16207 transitions. [2021-03-10 22:57:11,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 529 states. [2021-03-10 22:57:11,866 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:57:11,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:57:11,872 INFO L225 Difference]: With dead ends: 8194 [2021-03-10 22:57:11,872 INFO L226 Difference]: Without dead ends: 6598 [2021-03-10 22:57:11,887 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 613 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183369 ImplicationChecksByTransitivity, 112329.6ms TimeCoverageRelationStatistics Valid=106395, Invalid=271215, Unknown=0, NotChecked=0, Total=377610 [2021-03-10 22:57:11,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6598 states. [2021-03-10 22:57:11,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6598 to 488. [2021-03-10 22:57:11,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 2.0677618069815193) internal successors, (1007), 487 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:11,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1007 transitions. [2021-03-10 22:57:11,907 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1007 transitions. Word has length 96 [2021-03-10 22:57:11,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:57:11,907 INFO L480 AbstractCegarLoop]: Abstraction has 488 states and 1007 transitions. [2021-03-10 22:57:11,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:57:11,908 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1007 transitions. [2021-03-10 22:57:11,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:57:11,908 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:57:11,908 INFO L519 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:57:12,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-03-10 22:57:12,111 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:57:12,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:57:12,111 INFO L82 PathProgramCache]: Analyzing trace with hash -817968499, now seen corresponding path program 60 times [2021-03-10 22:57:12,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:57:12,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395333423] [2021-03-10 22:57:12,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:57:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:57:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:13,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395333423] [2021-03-10 22:57:13,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206208427] [2021-03-10 22:57:13,904 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:57:13,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-03-10 22:57:13,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:57:13,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 22:57:13,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:57:23,224 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:57:23,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:57:23,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 45] total 68 [2021-03-10 22:57:23,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575098034] [2021-03-10 22:57:23,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-03-10 22:57:23,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:57:23,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-03-10 22:57:23,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=893, Invalid=3799, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 22:57:23,225 INFO L87 Difference]: Start difference. First operand 488 states and 1007 transitions. Second operand has 69 states, 69 states have (on average 2.63768115942029) internal successors, (182), 68 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:58:27,402 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 Received shutdown request... [2021-03-10 22:58:58,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 467 states. [2021-03-10 22:58:58,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:58:58,865 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 22:58:58,868 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 22:58:58,868 INFO L202 PluginConnector]: Adding new model figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 10:58:58 BasicIcfg [2021-03-10 22:58:58,868 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 22:58:58,869 INFO L168 Benchmark]: Toolchain (without parser) took 822285.40 ms. Allocated memory was 255.9 MB in the beginning and 721.4 MB in the end (delta: 465.6 MB). Free memory was 236.4 MB in the beginning and 305.5 MB in the end (delta: -69.0 MB). Peak memory consumption was 398.1 MB. Max. memory is 16.0 GB. [2021-03-10 22:58:58,869 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 22:58:58,869 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.36 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 22:58:58,869 INFO L168 Benchmark]: Boogie Preprocessor took 13.02 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.6 MB in the end (delta: 925.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 22:58:58,869 INFO L168 Benchmark]: RCFGBuilder took 229.34 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 238.4 MB in the end (delta: -5.0 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. [2021-03-10 22:58:58,869 INFO L168 Benchmark]: TraceAbstraction took 822016.28 ms. Allocated memory was 255.9 MB in the beginning and 721.4 MB in the end (delta: 465.6 MB). Free memory was 237.8 MB in the beginning and 305.5 MB in the end (delta: -67.7 MB). Peak memory consumption was 398.8 MB. Max. memory is 16.0 GB. [2021-03-10 22:58:58,869 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 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.36 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.02 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.6 MB in the end (delta: 925.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 229.34 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 238.4 MB in the end (delta: -5.0 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 822016.28 ms. Allocated memory was 255.9 MB in the beginning and 721.4 MB in the end (delta: 465.6 MB). Free memory was 237.8 MB in the beginning and 305.5 MB in the end (delta: -67.7 MB). Peak memory consumption was 398.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 50). Cancelled while BasicCegarLoop was constructing difference of abstraction (488states) and FLOYD_HOARE automaton (currently 467 states, 69 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 532 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 821954.8ms, OverallIterations: 63, TraceHistogramMax: 21, EmptinessCheckTime: 42.7ms, AutomataDifference: 709618.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4685 SDtfs, 36943 SDslu, 73394 SDs, 0 SdLazy, 82798 SolverSat, 4516 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 41801.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13375 GetRequests, 2666 SyntacticMatches, 40 SemanticMatches, 10668 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780583 ImplicationChecksByTransitivity, 662264.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=825occurred in iteration=61, InterpolantAutomatonStates: 8398, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 472.8ms AutomataMinimizationTime, 62 MinimizatonAttempts, 87747 StatesRemovedByMinimization, 62 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 276.0ms SsaConstructionTime, 1166.1ms SatisfiabilityAnalysisTime, 96458.1ms InterpolantComputationTime, 6942 NumberOfCodeBlocks, 6942 NumberOfCodeBlocksAsserted, 523 NumberOfCheckSat, 6818 ConstructedInterpolants, 0 QuantifiedInterpolants, 44980 SizeOfPredicates, 184 NumberOfNonLiveVariables, 8843 ConjunctsInSsa, 1545 ConjunctsInUnsatCore, 124 InterpolantComputations, 2 PerfectInterpolantSequences, 14811/36203 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown