/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/mult-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 22:57:10,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 22:57:10,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 22:57:10,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 22:57:10,513 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 [2021-06-05 22:57:10,547 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 22:57:10,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 22:57:10,548 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 22:57:10,549 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 22:57:10,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 22:57:10,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 22:57:10,551 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 22:57:10,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 22:57:10,552 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 22:57:10,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 22:57:10,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 22:57:10,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 22:57:10,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 22:57:10,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 22:57:10,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 22:57:10,553 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 22:57:10,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 22:57:10,553 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 22:57:10,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 22:57:10,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 22:57:10,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 22:57:10,554 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 22:57:10,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 22:57:10,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:57:10,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 22:57:10,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 22:57:10,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 22:57:10,555 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 22:57:10,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 22:57:10,555 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 22:57:10,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 22:57:10,555 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 22:57:10,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 22:57:10,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 22:57:10,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 22:57:10,871 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 22:57:10,876 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 22:57:10,877 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl [2021-06-05 22:57:10,877 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl' [2021-06-05 22:57:10,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 22:57:10,912 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 22:57:10,913 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 22:57:10,913 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 22:57:10,913 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 22:57:10,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:57:10" (1/1) ... [2021-06-05 22:57:10,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:57:10" (1/1) ... [2021-06-05 22:57:10,942 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 22:57:10,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 22:57:10,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 22:57:10,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 22:57:10,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:57:10" (1/1) ... [2021-06-05 22:57:10,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:57:10" (1/1) ... [2021-06-05 22:57:10,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:57:10" (1/1) ... [2021-06-05 22:57:10,953 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:57:10" (1/1) ... [2021-06-05 22:57:10,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:57:10" (1/1) ... [2021-06-05 22:57:10,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:57:10" (1/1) ... [2021-06-05 22:57:10,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:57:10" (1/1) ... [2021-06-05 22:57:10,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 22:57:10,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 22:57:10,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 22:57:10,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 22:57:10,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:57:10" (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 [2021-06-05 22:57:11,024 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 22:57:11,030 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 22:57:11,030 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 22:57:11,031 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 22:57:11,031 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 22:57:11,031 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 22:57:11,031 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 22:57:11,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 22:57:11,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 22:57:11,031 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 22:57:11,032 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 22:57:11,032 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 22:57:11,032 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 22:57:11,189 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 22:57:11,189 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 22:57:11,191 INFO L202 PluginConnector]: Adding new model mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:57:11 BoogieIcfgContainer [2021-06-05 22:57:11,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 22:57:11,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 22:57:11,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 22:57:11,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 22:57:11,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:57:10" (1/2) ... [2021-06-05 22:57:11,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36632caa and model type mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 10:57:11, skipping insertion in model container [2021-06-05 22:57:11,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:57:11" (2/2) ... [2021-06-05 22:57:11,197 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-equiv.wvr.bpl [2021-06-05 22:57:11,201 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 22:57:11,201 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 22:57:11,202 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 22:57:11,202 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 22:57:11,231 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 22:57:11,248 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 22:57:11,264 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:57:11,265 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:57:11,277 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:57:11,278 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:57:11,278 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:57:11,278 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:57:11,278 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:57:11,278 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 22:57:11,285 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2021-06-05 22:57:11,305 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:11,307 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:11,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:57:11,314 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:11,315 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:11,315 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:11,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:11,319 INFO L82 PathProgramCache]: Analyzing trace with hash -2116175235, now seen corresponding path program 1 times [2021-06-05 22:57:11,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:11,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56826400] [2021-06-05 22:57:11,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:11,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:11,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:11,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56826400] [2021-06-05 22:57:11,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56826400] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:57:11,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:57:11,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 22:57:11,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275037265] [2021-06-05 22:57:11,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:57:11,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:11,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:57:11,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:57:11,498 INFO L87 Difference]: Start difference. First operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:11,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:11,530 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2021-06-05 22:57:11,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:57:11,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:57:11,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:11,542 INFO L225 Difference]: With dead ends: 214 [2021-06-05 22:57:11,542 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 22:57:11,544 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:57:11,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 22:57:11,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2021-06-05 22:57:11,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:11,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2021-06-05 22:57:11,588 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2021-06-05 22:57:11,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:11,588 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2021-06-05 22:57:11,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:11,589 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2021-06-05 22:57:11,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:57:11,591 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:11,591 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:11,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 22:57:11,591 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:11,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:11,592 INFO L82 PathProgramCache]: Analyzing trace with hash 655800031, now seen corresponding path program 1 times [2021-06-05 22:57:11,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:11,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659864593] [2021-06-05 22:57:11,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:11,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:11,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659864593] [2021-06-05 22:57:11,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659864593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:11,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174225768] [2021-06-05 22:57:11,674 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 [2021-06-05 22:57:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:11,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 22:57:11,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:11,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174225768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:11,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:11,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 22:57:11,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598990991] [2021-06-05 22:57:11,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:57:11,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:11,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:57:11,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:57:11,844 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:11,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:11,969 INFO L93 Difference]: Finished difference Result 365 states and 1020 transitions. [2021-06-05 22:57:11,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:57:11,972 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:57:11,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:11,979 INFO L225 Difference]: With dead ends: 365 [2021-06-05 22:57:11,979 INFO L226 Difference]: Without dead ends: 365 [2021-06-05 22:57:11,980 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:57:11,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-05 22:57:12,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 179. [2021-06-05 22:57:12,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 3.00561797752809) internal successors, (535), 178 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:12,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 535 transitions. [2021-06-05 22:57:12,005 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 535 transitions. Word has length 17 [2021-06-05 22:57:12,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:12,005 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 535 transitions. [2021-06-05 22:57:12,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:12,005 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 535 transitions. [2021-06-05 22:57:12,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:57:12,007 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:12,007 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:12,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 22:57:12,230 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:12,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:12,230 INFO L82 PathProgramCache]: Analyzing trace with hash -2126444319, now seen corresponding path program 1 times [2021-06-05 22:57:12,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:12,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184435488] [2021-06-05 22:57:12,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:12,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:12,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:12,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:12,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184435488] [2021-06-05 22:57:12,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184435488] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:57:12,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:57:12,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:57:12,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914705691] [2021-06-05 22:57:12,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:57:12,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:12,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:57:12,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:57:12,285 INFO L87 Difference]: Start difference. First operand 179 states and 535 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:12,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:12,333 INFO L93 Difference]: Finished difference Result 237 states and 680 transitions. [2021-06-05 22:57:12,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:57:12,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:57:12,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:12,381 INFO L225 Difference]: With dead ends: 237 [2021-06-05 22:57:12,381 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 22:57:12,381 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:57:12,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 22:57:12,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 188. [2021-06-05 22:57:12,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.9893048128342246) internal successors, (559), 187 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:12,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 559 transitions. [2021-06-05 22:57:12,411 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 559 transitions. Word has length 17 [2021-06-05 22:57:12,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:12,412 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 559 transitions. [2021-06-05 22:57:12,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:12,412 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 559 transitions. [2021-06-05 22:57:12,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:57:12,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:12,422 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:12,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 22:57:12,422 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:12,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:12,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1369482973, now seen corresponding path program 2 times [2021-06-05 22:57:12,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:12,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738685415] [2021-06-05 22:57:12,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:12,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:12,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:12,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738685415] [2021-06-05 22:57:12,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738685415] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:57:12,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:57:12,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:57:12,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506879190] [2021-06-05 22:57:12,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:57:12,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:12,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:57:12,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:57:12,487 INFO L87 Difference]: Start difference. First operand 188 states and 559 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:12,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:12,540 INFO L93 Difference]: Finished difference Result 293 states and 808 transitions. [2021-06-05 22:57:12,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:57:12,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:57:12,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:12,543 INFO L225 Difference]: With dead ends: 293 [2021-06-05 22:57:12,543 INFO L226 Difference]: Without dead ends: 293 [2021-06-05 22:57:12,543 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:57:12,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-06-05 22:57:12,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 164. [2021-06-05 22:57:12,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.932515337423313) internal successors, (478), 163 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:12,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 478 transitions. [2021-06-05 22:57:12,549 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 478 transitions. Word has length 17 [2021-06-05 22:57:12,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:12,550 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 478 transitions. [2021-06-05 22:57:12,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:12,550 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 478 transitions. [2021-06-05 22:57:12,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:57:12,551 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:12,551 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:12,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 22:57:12,551 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:12,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:12,551 INFO L82 PathProgramCache]: Analyzing trace with hash 984474203, now seen corresponding path program 1 times [2021-06-05 22:57:12,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:12,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916458840] [2021-06-05 22:57:12,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:12,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:12,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916458840] [2021-06-05 22:57:12,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916458840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:12,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794188390] [2021-06-05 22:57:12,579 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 [2021-06-05 22:57:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:12,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 22:57:12,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:12,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794188390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:12,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:12,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 22:57:12,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257315209] [2021-06-05 22:57:12,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:57:12,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:12,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:57:12,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:57:12,676 INFO L87 Difference]: Start difference. First operand 164 states and 478 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:12,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:12,742 INFO L93 Difference]: Finished difference Result 348 states and 971 transitions. [2021-06-05 22:57:12,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:57:12,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:57:12,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:12,744 INFO L225 Difference]: With dead ends: 348 [2021-06-05 22:57:12,744 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 22:57:12,745 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:57:12,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 22:57:12,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 170. [2021-06-05 22:57:12,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.964497041420118) internal successors, (501), 169 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) [2021-06-05 22:57:12,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 501 transitions. [2021-06-05 22:57:12,756 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 501 transitions. Word has length 17 [2021-06-05 22:57:12,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:12,757 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 501 transitions. [2021-06-05 22:57:12,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:12,758 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 501 transitions. [2021-06-05 22:57:12,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:57:12,760 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:12,760 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:12,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:12,977 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:12,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:12,977 INFO L82 PathProgramCache]: Analyzing trace with hash -427193509, now seen corresponding path program 3 times [2021-06-05 22:57:12,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:12,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307249807] [2021-06-05 22:57:12,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:13,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:13,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307249807] [2021-06-05 22:57:13,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307249807] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:57:13,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:57:13,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:57:13,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494507609] [2021-06-05 22:57:13,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:57:13,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:13,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:57:13,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:57:13,012 INFO L87 Difference]: Start difference. First operand 170 states and 501 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:13,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:13,057 INFO L93 Difference]: Finished difference Result 204 states and 542 transitions. [2021-06-05 22:57:13,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:57:13,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:57:13,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:13,060 INFO L225 Difference]: With dead ends: 204 [2021-06-05 22:57:13,060 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 22:57:13,060 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:57:13,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 22:57:13,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 155. [2021-06-05 22:57:13,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.779220779220779) internal successors, (428), 154 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:13,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 428 transitions. [2021-06-05 22:57:13,068 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 428 transitions. Word has length 17 [2021-06-05 22:57:13,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:13,068 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 428 transitions. [2021-06-05 22:57:13,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:13,068 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 428 transitions. [2021-06-05 22:57:13,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:57:13,069 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:13,069 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:13,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 22:57:13,069 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:13,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:13,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1972981309, now seen corresponding path program 1 times [2021-06-05 22:57:13,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:13,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096994729] [2021-06-05 22:57:13,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:13,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:13,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:13,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096994729] [2021-06-05 22:57:13,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096994729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:13,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095816634] [2021-06-05 22:57:13,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 22:57:13,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:13,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 22:57:13,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:13,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:13,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095816634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:13,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:13,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-06-05 22:57:13,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543106442] [2021-06-05 22:57:13,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:57:13,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:13,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:57:13,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:57:13,234 INFO L87 Difference]: Start difference. First operand 155 states and 428 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:13,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:13,320 INFO L93 Difference]: Finished difference Result 284 states and 786 transitions. [2021-06-05 22:57:13,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:57:13,321 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:57:13,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:13,323 INFO L225 Difference]: With dead ends: 284 [2021-06-05 22:57:13,323 INFO L226 Difference]: Without dead ends: 284 [2021-06-05 22:57:13,323 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:57:13,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-05 22:57:13,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 216. [2021-06-05 22:57:13,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.827906976744186) internal successors, (608), 215 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:13,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 608 transitions. [2021-06-05 22:57:13,330 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 608 transitions. Word has length 19 [2021-06-05 22:57:13,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:13,330 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 608 transitions. [2021-06-05 22:57:13,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:13,330 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 608 transitions. [2021-06-05 22:57:13,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:57:13,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:13,331 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:13,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:13,545 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:13,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:13,545 INFO L82 PathProgramCache]: Analyzing trace with hash 179262851, now seen corresponding path program 1 times [2021-06-05 22:57:13,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:13,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585849566] [2021-06-05 22:57:13,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:13,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:57:13,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:13,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585849566] [2021-06-05 22:57:13,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585849566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:13,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509115471] [2021-06-05 22:57:13,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 22:57:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:13,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:57:13,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:57:13,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509115471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:13,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:13,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 22:57:13,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763797601] [2021-06-05 22:57:13,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:57:13,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:13,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:57:13,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:57:13,752 INFO L87 Difference]: Start difference. First operand 216 states and 608 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:13,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:13,783 INFO L93 Difference]: Finished difference Result 348 states and 985 transitions. [2021-06-05 22:57:13,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:57:13,783 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:57:13,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:13,785 INFO L225 Difference]: With dead ends: 348 [2021-06-05 22:57:13,785 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 22:57:13,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:57:13,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 22:57:13,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 250. [2021-06-05 22:57:13,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.895582329317269) internal successors, (721), 249 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:13,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 721 transitions. [2021-06-05 22:57:13,792 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 721 transitions. Word has length 19 [2021-06-05 22:57:13,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:13,793 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 721 transitions. [2021-06-05 22:57:13,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:13,793 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 721 transitions. [2021-06-05 22:57:13,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:57:13,793 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:13,794 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:14,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:14,009 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:14,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:14,009 INFO L82 PathProgramCache]: Analyzing trace with hash -701176209, now seen corresponding path program 2 times [2021-06-05 22:57:14,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:14,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971865937] [2021-06-05 22:57:14,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:14,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:57:14,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:14,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971865937] [2021-06-05 22:57:14,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971865937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:14,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352540652] [2021-06-05 22:57:14,066 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 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 [2021-06-05 22:57:14,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:57:14,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:14,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:57:14,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:57:14,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352540652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:14,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:14,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 22:57:14,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822023440] [2021-06-05 22:57:14,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:57:14,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:14,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:57:14,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:57:14,183 INFO L87 Difference]: Start difference. First operand 250 states and 721 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:14,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:14,215 INFO L93 Difference]: Finished difference Result 521 states and 1486 transitions. [2021-06-05 22:57:14,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:57:14,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:57:14,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:14,219 INFO L225 Difference]: With dead ends: 521 [2021-06-05 22:57:14,219 INFO L226 Difference]: Without dead ends: 500 [2021-06-05 22:57:14,219 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:57:14,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-05 22:57:14,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 290. [2021-06-05 22:57:14,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.0069204152249136) internal successors, (869), 289 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) [2021-06-05 22:57:14,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 869 transitions. [2021-06-05 22:57:14,228 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 869 transitions. Word has length 19 [2021-06-05 22:57:14,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:14,228 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 869 transitions. [2021-06-05 22:57:14,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:14,229 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 869 transitions. [2021-06-05 22:57:14,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:57:14,229 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:14,230 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:14,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:14,449 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:14,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:14,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1410387015, now seen corresponding path program 3 times [2021-06-05 22:57:14,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:14,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022766] [2021-06-05 22:57:14,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:14,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:14,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:14,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022766] [2021-06-05 22:57:14,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:14,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251495100] [2021-06-05 22:57:14,523 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:14,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:57:14,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:14,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:57:14,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:14,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251495100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:14,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:14,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 22:57:14,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581210812] [2021-06-05 22:57:14,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:57:14,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:14,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:57:14,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:57:14,665 INFO L87 Difference]: Start difference. First operand 290 states and 869 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:14,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:14,703 INFO L93 Difference]: Finished difference Result 528 states and 1543 transitions. [2021-06-05 22:57:14,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:57:14,703 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:57:14,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:14,706 INFO L225 Difference]: With dead ends: 528 [2021-06-05 22:57:14,706 INFO L226 Difference]: Without dead ends: 507 [2021-06-05 22:57:14,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:57:14,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-05 22:57:14,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 326. [2021-06-05 22:57:14,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.08) internal successors, (1001), 325 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:14,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1001 transitions. [2021-06-05 22:57:14,717 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1001 transitions. Word has length 19 [2021-06-05 22:57:14,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:14,717 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 1001 transitions. [2021-06-05 22:57:14,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:14,718 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1001 transitions. [2021-06-05 22:57:14,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:57:14,719 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:14,719 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:14,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:14,937 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:14,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:14,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1264041205, now seen corresponding path program 2 times [2021-06-05 22:57:14,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:14,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136716162] [2021-06-05 22:57:14,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:14,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:14,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136716162] [2021-06-05 22:57:14,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136716162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:14,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542161042] [2021-06-05 22:57:14,965 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 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 [2021-06-05 22:57:14,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:57:14,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:14,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 22:57:14,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:15,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542161042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:15,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:15,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 22:57:15,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922559477] [2021-06-05 22:57:15,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:57:15,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:15,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:57:15,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:57:15,030 INFO L87 Difference]: Start difference. First operand 326 states and 1001 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:15,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:15,137 INFO L93 Difference]: Finished difference Result 686 states and 2051 transitions. [2021-06-05 22:57:15,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:57:15,138 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:57:15,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:15,141 INFO L225 Difference]: With dead ends: 686 [2021-06-05 22:57:15,142 INFO L226 Difference]: Without dead ends: 686 [2021-06-05 22:57:15,142 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:57:15,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-06-05 22:57:15,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 370. [2021-06-05 22:57:15,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.2466124661246614) internal successors, (1198), 369 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:15,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1198 transitions. [2021-06-05 22:57:15,156 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1198 transitions. Word has length 19 [2021-06-05 22:57:15,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:15,157 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1198 transitions. [2021-06-05 22:57:15,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:15,157 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1198 transitions. [2021-06-05 22:57:15,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:57:15,158 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:15,158 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:15,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:15,381 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:15,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:15,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1749845309, now seen corresponding path program 3 times [2021-06-05 22:57:15,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:15,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061679836] [2021-06-05 22:57:15,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:15,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:15,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061679836] [2021-06-05 22:57:15,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061679836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:15,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987101575] [2021-06-05 22:57:15,421 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 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 [2021-06-05 22:57:15,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:57:15,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:15,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 22:57:15,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:15,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987101575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:15,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:15,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 22:57:15,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159112051] [2021-06-05 22:57:15,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:57:15,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:15,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:57:15,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:57:15,503 INFO L87 Difference]: Start difference. First operand 370 states and 1198 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:15,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:15,639 INFO L93 Difference]: Finished difference Result 642 states and 2005 transitions. [2021-06-05 22:57:15,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:57:15,640 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:57:15,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:15,643 INFO L225 Difference]: With dead ends: 642 [2021-06-05 22:57:15,643 INFO L226 Difference]: Without dead ends: 642 [2021-06-05 22:57:15,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:57:15,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-06-05 22:57:15,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 388. [2021-06-05 22:57:15,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.289405684754522) internal successors, (1273), 387 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:15,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1273 transitions. [2021-06-05 22:57:15,657 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1273 transitions. Word has length 19 [2021-06-05 22:57:15,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:15,658 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1273 transitions. [2021-06-05 22:57:15,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:15,658 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1273 transitions. [2021-06-05 22:57:15,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:57:15,659 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:15,659 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:15,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 22:57:15,882 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:15,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:15,882 INFO L82 PathProgramCache]: Analyzing trace with hash 768837147, now seen corresponding path program 4 times [2021-06-05 22:57:15,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:15,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146266518] [2021-06-05 22:57:15,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:15,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:15,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146266518] [2021-06-05 22:57:15,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146266518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:15,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315762195] [2021-06-05 22:57:15,963 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 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 [2021-06-05 22:57:16,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:57:16,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:16,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:57:16,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:16,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315762195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:16,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:16,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 22:57:16,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846068356] [2021-06-05 22:57:16,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:57:16,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:16,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:57:16,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:57:16,094 INFO L87 Difference]: Start difference. First operand 388 states and 1273 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:16,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:16,143 INFO L93 Difference]: Finished difference Result 752 states and 2293 transitions. [2021-06-05 22:57:16,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:57:16,144 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:57:16,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:16,148 INFO L225 Difference]: With dead ends: 752 [2021-06-05 22:57:16,148 INFO L226 Difference]: Without dead ends: 731 [2021-06-05 22:57:16,148 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:57:16,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-06-05 22:57:16,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 468. [2021-06-05 22:57:16,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.278372591006424) internal successors, (1531), 467 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:16,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1531 transitions. [2021-06-05 22:57:16,168 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1531 transitions. Word has length 21 [2021-06-05 22:57:16,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:16,168 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1531 transitions. [2021-06-05 22:57:16,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:16,168 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1531 transitions. [2021-06-05 22:57:16,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:57:16,170 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:16,170 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:16,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:16,385 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:16,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:16,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1069401327, now seen corresponding path program 5 times [2021-06-05 22:57:16,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:16,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933112392] [2021-06-05 22:57:16,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:16,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:16,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:16,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933112392] [2021-06-05 22:57:16,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933112392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:16,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696221053] [2021-06-05 22:57:16,437 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 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 [2021-06-05 22:57:16,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:57:16,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:16,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:57:16,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:16,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:16,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696221053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:16,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:16,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 22:57:16,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644103263] [2021-06-05 22:57:16,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:57:16,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:16,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:57:16,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:57:16,525 INFO L87 Difference]: Start difference. First operand 468 states and 1531 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:16,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:16,578 INFO L93 Difference]: Finished difference Result 738 states and 2318 transitions. [2021-06-05 22:57:16,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:57:16,579 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:57:16,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:16,583 INFO L225 Difference]: With dead ends: 738 [2021-06-05 22:57:16,583 INFO L226 Difference]: Without dead ends: 717 [2021-06-05 22:57:16,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:57:16,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-06-05 22:57:16,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 485. [2021-06-05 22:57:16,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.3161157024793386) internal successors, (1605), 484 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) [2021-06-05 22:57:16,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1605 transitions. [2021-06-05 22:57:16,598 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1605 transitions. Word has length 21 [2021-06-05 22:57:16,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:16,598 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1605 transitions. [2021-06-05 22:57:16,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:16,599 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1605 transitions. [2021-06-05 22:57:16,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:57:16,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:16,600 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:16,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:16,813 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:16,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:16,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1991189035, now seen corresponding path program 6 times [2021-06-05 22:57:16,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:16,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530679696] [2021-06-05 22:57:16,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:57:16,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:16,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530679696] [2021-06-05 22:57:16,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530679696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:16,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120254359] [2021-06-05 22:57:16,872 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 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 [2021-06-05 22:57:16,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:57:16,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:16,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:57:16,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:57:16,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120254359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:16,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:16,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 22:57:16,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922047198] [2021-06-05 22:57:16,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:57:16,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:16,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:57:16,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:57:16,981 INFO L87 Difference]: Start difference. First operand 485 states and 1605 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:17,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:17,040 INFO L93 Difference]: Finished difference Result 608 states and 1958 transitions. [2021-06-05 22:57:17,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:57:17,040 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:57:17,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:17,043 INFO L225 Difference]: With dead ends: 608 [2021-06-05 22:57:17,043 INFO L226 Difference]: Without dead ends: 587 [2021-06-05 22:57:17,046 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:57:17,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-06-05 22:57:17,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 495. [2021-06-05 22:57:17,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.3238866396761133) internal successors, (1642), 494 states have internal predecessors, (1642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:17,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1642 transitions. [2021-06-05 22:57:17,060 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1642 transitions. Word has length 21 [2021-06-05 22:57:17,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:17,060 INFO L482 AbstractCegarLoop]: Abstraction has 495 states and 1642 transitions. [2021-06-05 22:57:17,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:17,060 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1642 transitions. [2021-06-05 22:57:17,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:57:17,062 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:17,062 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:17,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 22:57:17,285 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:17,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:17,285 INFO L82 PathProgramCache]: Analyzing trace with hash -239271515, now seen corresponding path program 4 times [2021-06-05 22:57:17,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:17,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203183825] [2021-06-05 22:57:17,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:17,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:17,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:17,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203183825] [2021-06-05 22:57:17,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203183825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:17,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891663952] [2021-06-05 22:57:17,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 22:57:17,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:57:17,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:17,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 22:57:17,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:17,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891663952] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:57:17,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 22:57:17,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-06-05 22:57:17,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673559070] [2021-06-05 22:57:17,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:57:17,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:17,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:57:17,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:57:17,384 INFO L87 Difference]: Start difference. First operand 495 states and 1642 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:17,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:17,447 INFO L93 Difference]: Finished difference Result 728 states and 2245 transitions. [2021-06-05 22:57:17,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:57:17,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:57:17,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:17,451 INFO L225 Difference]: With dead ends: 728 [2021-06-05 22:57:17,451 INFO L226 Difference]: Without dead ends: 696 [2021-06-05 22:57:17,451 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:57:17,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-06-05 22:57:17,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 583. [2021-06-05 22:57:17,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.261168384879725) internal successors, (1898), 582 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:17,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1898 transitions. [2021-06-05 22:57:17,467 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1898 transitions. Word has length 21 [2021-06-05 22:57:17,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:17,467 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1898 transitions. [2021-06-05 22:57:17,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:17,467 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1898 transitions. [2021-06-05 22:57:17,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:57:17,469 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:17,469 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:17,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 22:57:17,691 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:17,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:17,692 INFO L82 PathProgramCache]: Analyzing trace with hash -2124383007, now seen corresponding path program 5 times [2021-06-05 22:57:17,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:17,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627036000] [2021-06-05 22:57:17,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:17,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:57:17,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:17,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627036000] [2021-06-05 22:57:17,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627036000] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:57:17,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:57:17,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:57:17,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380134684] [2021-06-05 22:57:17,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:57:17,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:17,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:57:17,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:57:17,715 INFO L87 Difference]: Start difference. First operand 583 states and 1898 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:17,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:17,735 INFO L93 Difference]: Finished difference Result 673 states and 2107 transitions. [2021-06-05 22:57:17,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:57:17,736 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:57:17,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:17,739 INFO L225 Difference]: With dead ends: 673 [2021-06-05 22:57:17,739 INFO L226 Difference]: Without dead ends: 625 [2021-06-05 22:57:17,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:57:17,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-06-05 22:57:17,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 529. [2021-06-05 22:57:17,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 3.2556818181818183) internal successors, (1719), 528 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:17,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1719 transitions. [2021-06-05 22:57:17,753 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1719 transitions. Word has length 21 [2021-06-05 22:57:17,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:17,753 INFO L482 AbstractCegarLoop]: Abstraction has 529 states and 1719 transitions. [2021-06-05 22:57:17,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:17,754 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1719 transitions. [2021-06-05 22:57:17,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:57:17,755 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:17,755 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:17,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-05 22:57:17,755 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:17,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:17,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1743968741, now seen corresponding path program 6 times [2021-06-05 22:57:17,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:17,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953277934] [2021-06-05 22:57:17,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:17,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:17,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953277934] [2021-06-05 22:57:17,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953277934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:17,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163020397] [2021-06-05 22:57:17,776 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 [2021-06-05 22:57:17,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:57:17,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:17,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 22:57:17,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:17,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163020397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:17,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:17,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 22:57:17,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555054132] [2021-06-05 22:57:17,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:57:17,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:17,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:57:17,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:57:17,862 INFO L87 Difference]: Start difference. First operand 529 states and 1719 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:17,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:17,950 INFO L93 Difference]: Finished difference Result 834 states and 2517 transitions. [2021-06-05 22:57:17,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:57:17,950 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:57:17,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:17,954 INFO L225 Difference]: With dead ends: 834 [2021-06-05 22:57:17,954 INFO L226 Difference]: Without dead ends: 804 [2021-06-05 22:57:17,954 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:57:17,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-06-05 22:57:17,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 598. [2021-06-05 22:57:17,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.2981574539363483) internal successors, (1969), 597 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:17,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1969 transitions. [2021-06-05 22:57:17,971 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1969 transitions. Word has length 21 [2021-06-05 22:57:17,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:17,971 INFO L482 AbstractCegarLoop]: Abstraction has 598 states and 1969 transitions. [2021-06-05 22:57:17,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:17,971 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1969 transitions. [2021-06-05 22:57:17,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:57:17,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:17,973 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:18,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 22:57:18,189 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:18,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:18,189 INFO L82 PathProgramCache]: Analyzing trace with hash 685016161, now seen corresponding path program 7 times [2021-06-05 22:57:18,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:18,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989571327] [2021-06-05 22:57:18,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:18,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:18,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989571327] [2021-06-05 22:57:18,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989571327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:18,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63070745] [2021-06-05 22:57:18,212 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 [2021-06-05 22:57:18,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:18,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 22:57:18,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:18,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63070745] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:57:18,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 22:57:18,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-06-05 22:57:18,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541076269] [2021-06-05 22:57:18,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:57:18,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:18,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:57:18,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:57:18,308 INFO L87 Difference]: Start difference. First operand 598 states and 1969 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:18,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:18,383 INFO L93 Difference]: Finished difference Result 790 states and 2403 transitions. [2021-06-05 22:57:18,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:57:18,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:57:18,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:18,387 INFO L225 Difference]: With dead ends: 790 [2021-06-05 22:57:18,387 INFO L226 Difference]: Without dead ends: 782 [2021-06-05 22:57:18,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:57:18,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-06-05 22:57:18,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 591. [2021-06-05 22:57:18,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.2711864406779663) internal successors, (1930), 590 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:18,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1930 transitions. [2021-06-05 22:57:18,403 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1930 transitions. Word has length 21 [2021-06-05 22:57:18,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:18,403 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1930 transitions. [2021-06-05 22:57:18,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:18,403 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1930 transitions. [2021-06-05 22:57:18,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:57:18,405 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:18,405 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:18,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:18,621 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:18,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:18,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1433719009, now seen corresponding path program 8 times [2021-06-05 22:57:18,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:18,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196009496] [2021-06-05 22:57:18,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:18,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:18,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196009496] [2021-06-05 22:57:18,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196009496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:18,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940428568] [2021-06-05 22:57:18,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 22:57:18,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:57:18,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:18,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:57:18,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:18,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940428568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:18,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:18,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-06-05 22:57:18,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273334607] [2021-06-05 22:57:18,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:57:18,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:18,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:57:18,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:57:18,772 INFO L87 Difference]: Start difference. First operand 591 states and 1930 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:18,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:18,901 INFO L93 Difference]: Finished difference Result 768 states and 2356 transitions. [2021-06-05 22:57:18,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:57:18,902 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:57:18,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:18,905 INFO L225 Difference]: With dead ends: 768 [2021-06-05 22:57:18,905 INFO L226 Difference]: Without dead ends: 732 [2021-06-05 22:57:18,905 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:57:18,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-06-05 22:57:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 589. [2021-06-05 22:57:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 3.241496598639456) internal successors, (1906), 588 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:18,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1906 transitions. [2021-06-05 22:57:18,921 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1906 transitions. Word has length 21 [2021-06-05 22:57:18,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:18,921 INFO L482 AbstractCegarLoop]: Abstraction has 589 states and 1906 transitions. [2021-06-05 22:57:18,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:18,921 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1906 transitions. [2021-06-05 22:57:18,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:57:18,922 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:18,923 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:19,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:19,137 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:19,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:19,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1263605021, now seen corresponding path program 9 times [2021-06-05 22:57:19,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:19,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704964561] [2021-06-05 22:57:19,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:19,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:19,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704964561] [2021-06-05 22:57:19,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704964561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:19,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83692343] [2021-06-05 22:57:19,186 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 [2021-06-05 22:57:19,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:57:19,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:19,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:57:19,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:19,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:19,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83692343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:19,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:19,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 22:57:19,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574454088] [2021-06-05 22:57:19,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:57:19,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:19,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:57:19,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:57:19,264 INFO L87 Difference]: Start difference. First operand 589 states and 1906 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:19,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:19,411 INFO L93 Difference]: Finished difference Result 1001 states and 3072 transitions. [2021-06-05 22:57:19,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:57:19,412 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:57:19,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:19,416 INFO L225 Difference]: With dead ends: 1001 [2021-06-05 22:57:19,416 INFO L226 Difference]: Without dead ends: 987 [2021-06-05 22:57:19,416 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:57:19,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-06-05 22:57:19,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 737. [2021-06-05 22:57:19,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.2880434782608696) internal successors, (2420), 736 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:19,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2420 transitions. [2021-06-05 22:57:19,435 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2420 transitions. Word has length 21 [2021-06-05 22:57:19,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:19,435 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2420 transitions. [2021-06-05 22:57:19,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:19,436 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2420 transitions. [2021-06-05 22:57:19,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:57:19,437 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:19,437 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:19,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:19,660 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:19,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:19,661 INFO L82 PathProgramCache]: Analyzing trace with hash -585994983, now seen corresponding path program 10 times [2021-06-05 22:57:19,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:19,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97201100] [2021-06-05 22:57:19,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:19,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:19,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:19,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97201100] [2021-06-05 22:57:19,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97201100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:19,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290368485] [2021-06-05 22:57:19,699 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 [2021-06-05 22:57:19,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:57:19,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:19,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:57:19,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:19,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:19,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290368485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:19,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:19,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 22:57:19,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757660068] [2021-06-05 22:57:19,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:57:19,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:19,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:57:19,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:57:19,813 INFO L87 Difference]: Start difference. First operand 737 states and 2420 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:19,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:19,914 INFO L93 Difference]: Finished difference Result 1120 states and 3472 transitions. [2021-06-05 22:57:19,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:57:19,914 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:57:19,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:19,919 INFO L225 Difference]: With dead ends: 1120 [2021-06-05 22:57:19,919 INFO L226 Difference]: Without dead ends: 1120 [2021-06-05 22:57:19,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:57:19,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-06-05 22:57:19,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 810. [2021-06-05 22:57:19,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.3325092707045734) internal successors, (2696), 809 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:19,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2696 transitions. [2021-06-05 22:57:19,952 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2696 transitions. Word has length 21 [2021-06-05 22:57:19,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:19,952 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2696 transitions. [2021-06-05 22:57:19,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:19,952 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2696 transitions. [2021-06-05 22:57:19,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:57:19,954 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:19,954 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:20,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 22:57:20,177 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:20,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:20,177 INFO L82 PathProgramCache]: Analyzing trace with hash -245591027, now seen corresponding path program 11 times [2021-06-05 22:57:20,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:20,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318538027] [2021-06-05 22:57:20,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:20,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:20,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318538027] [2021-06-05 22:57:20,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318538027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:20,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112131133] [2021-06-05 22:57:20,200 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 [2021-06-05 22:57:20,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:57:20,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:20,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:57:20,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:20,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112131133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:20,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:20,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-06-05 22:57:20,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284906504] [2021-06-05 22:57:20,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:57:20,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:20,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:57:20,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:57:20,306 INFO L87 Difference]: Start difference. First operand 810 states and 2696 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:20,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:20,397 INFO L93 Difference]: Finished difference Result 1340 states and 4210 transitions. [2021-06-05 22:57:20,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:57:20,397 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:57:20,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:20,403 INFO L225 Difference]: With dead ends: 1340 [2021-06-05 22:57:20,403 INFO L226 Difference]: Without dead ends: 1332 [2021-06-05 22:57:20,403 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:57:20,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-06-05 22:57:20,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 992. [2021-06-05 22:57:20,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.375378405650858) internal successors, (3345), 991 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:20,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3345 transitions. [2021-06-05 22:57:20,431 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3345 transitions. Word has length 21 [2021-06-05 22:57:20,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:20,431 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3345 transitions. [2021-06-05 22:57:20,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:20,431 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3345 transitions. [2021-06-05 22:57:20,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:57:20,434 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:20,434 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:20,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 22:57:20,656 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:20,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:20,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1657258739, now seen corresponding path program 12 times [2021-06-05 22:57:20,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:20,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59040366] [2021-06-05 22:57:20,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:20,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:20,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59040366] [2021-06-05 22:57:20,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59040366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:20,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569585621] [2021-06-05 22:57:20,687 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 [2021-06-05 22:57:20,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:57:20,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:20,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:57:20,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:20,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:20,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569585621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:20,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:20,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 22:57:20,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74156589] [2021-06-05 22:57:20,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:57:20,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:20,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:57:20,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:57:20,786 INFO L87 Difference]: Start difference. First operand 992 states and 3345 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:20,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:20,964 INFO L93 Difference]: Finished difference Result 1623 states and 5234 transitions. [2021-06-05 22:57:20,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:57:20,964 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:57:20,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:20,987 INFO L225 Difference]: With dead ends: 1623 [2021-06-05 22:57:20,987 INFO L226 Difference]: Without dead ends: 1615 [2021-06-05 22:57:20,988 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:57:20,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-06-05 22:57:21,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1215. [2021-06-05 22:57:21,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 3.383031301482702) internal successors, (4107), 1214 states have internal predecessors, (4107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:21,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 4107 transitions. [2021-06-05 22:57:21,023 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 4107 transitions. Word has length 21 [2021-06-05 22:57:21,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:21,024 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 4107 transitions. [2021-06-05 22:57:21,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:21,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 4107 transitions. [2021-06-05 22:57:21,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:57:21,027 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:21,027 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:21,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 22:57:21,245 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:21,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:21,245 INFO L82 PathProgramCache]: Analyzing trace with hash -372466675, now seen corresponding path program 13 times [2021-06-05 22:57:21,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:21,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991477025] [2021-06-05 22:57:21,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:21,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:21,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:21,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991477025] [2021-06-05 22:57:21,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991477025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:21,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687130764] [2021-06-05 22:57:21,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:21,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:21,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:57:21,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:21,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:21,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687130764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:21,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:21,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-06-05 22:57:21,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626663353] [2021-06-05 22:57:21,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:57:21,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:21,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:57:21,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:57:21,378 INFO L87 Difference]: Start difference. First operand 1215 states and 4107 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:21,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:21,510 INFO L93 Difference]: Finished difference Result 1527 states and 4890 transitions. [2021-06-05 22:57:21,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:57:21,510 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:57:21,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:21,514 INFO L225 Difference]: With dead ends: 1527 [2021-06-05 22:57:21,514 INFO L226 Difference]: Without dead ends: 1515 [2021-06-05 22:57:21,514 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:57:21,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-06-05 22:57:21,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1211. [2021-06-05 22:57:21,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 3.3826446280991735) internal successors, (4093), 1210 states have internal predecessors, (4093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:21,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 4093 transitions. [2021-06-05 22:57:21,542 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 4093 transitions. Word has length 21 [2021-06-05 22:57:21,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:21,543 INFO L482 AbstractCegarLoop]: Abstraction has 1211 states and 4093 transitions. [2021-06-05 22:57:21,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:21,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 4093 transitions. [2021-06-05 22:57:21,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:57:21,545 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:21,545 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:21,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 22:57:21,761 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:21,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:21,761 INFO L82 PathProgramCache]: Analyzing trace with hash 655355345, now seen corresponding path program 14 times [2021-06-05 22:57:21,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:21,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213887273] [2021-06-05 22:57:21,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:21,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:21,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213887273] [2021-06-05 22:57:21,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213887273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:21,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172749976] [2021-06-05 22:57:21,794 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 [2021-06-05 22:57:21,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:57:21,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:21,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:57:21,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:21,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172749976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:21,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:21,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 22:57:21,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31638589] [2021-06-05 22:57:21,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:57:21,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:21,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:57:21,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:57:21,887 INFO L87 Difference]: Start difference. First operand 1211 states and 4093 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:22,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:22,082 INFO L93 Difference]: Finished difference Result 2197 states and 7082 transitions. [2021-06-05 22:57:22,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:57:22,082 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:57:22,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:22,087 INFO L225 Difference]: With dead ends: 2197 [2021-06-05 22:57:22,087 INFO L226 Difference]: Without dead ends: 2197 [2021-06-05 22:57:22,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:57:22,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2021-06-05 22:57:22,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 1448. [2021-06-05 22:57:22,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 3.4457498272287492) internal successors, (4986), 1447 states have internal predecessors, (4986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:22,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 4986 transitions. [2021-06-05 22:57:22,123 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 4986 transitions. Word has length 21 [2021-06-05 22:57:22,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:22,124 INFO L482 AbstractCegarLoop]: Abstraction has 1448 states and 4986 transitions. [2021-06-05 22:57:22,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:22,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 4986 transitions. [2021-06-05 22:57:22,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:57:22,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:22,127 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:22,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 22:57:22,341 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:22,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:22,341 INFO L82 PathProgramCache]: Analyzing trace with hash 2086226193, now seen corresponding path program 15 times [2021-06-05 22:57:22,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:22,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587243193] [2021-06-05 22:57:22,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:22,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:22,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587243193] [2021-06-05 22:57:22,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587243193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:22,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084775568] [2021-06-05 22:57:22,364 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 [2021-06-05 22:57:22,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:57:22,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:22,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:57:22,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:22,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:22,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084775568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:22,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:22,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-06-05 22:57:22,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638537834] [2021-06-05 22:57:22,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:57:22,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:22,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:57:22,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:57:22,452 INFO L87 Difference]: Start difference. First operand 1448 states and 4986 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:22,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:22,664 INFO L93 Difference]: Finished difference Result 1739 states and 5729 transitions. [2021-06-05 22:57:22,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:57:22,664 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:57:22,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:22,667 INFO L225 Difference]: With dead ends: 1739 [2021-06-05 22:57:22,667 INFO L226 Difference]: Without dead ends: 1693 [2021-06-05 22:57:22,667 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:57:22,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2021-06-05 22:57:22,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1505. [2021-06-05 22:57:22,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 3.4095744680851063) internal successors, (5128), 1504 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:22,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 5128 transitions. [2021-06-05 22:57:22,698 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 5128 transitions. Word has length 21 [2021-06-05 22:57:22,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:22,698 INFO L482 AbstractCegarLoop]: Abstraction has 1505 states and 5128 transitions. [2021-06-05 22:57:22,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:22,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 5128 transitions. [2021-06-05 22:57:22,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:57:22,701 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:22,701 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:22,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:22,917 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:22,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:22,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1917770029, now seen corresponding path program 7 times [2021-06-05 22:57:22,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:22,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552426273] [2021-06-05 22:57:22,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:22,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:57:22,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:22,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552426273] [2021-06-05 22:57:22,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552426273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:22,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64339129] [2021-06-05 22:57:22,963 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 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 [2021-06-05 22:57:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:22,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:57:22,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:23,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:57:23,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64339129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:23,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:23,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 22:57:23,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364416271] [2021-06-05 22:57:23,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:57:23,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:23,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:57:23,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:57:23,043 INFO L87 Difference]: Start difference. First operand 1505 states and 5128 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:23,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:23,086 INFO L93 Difference]: Finished difference Result 1808 states and 5991 transitions. [2021-06-05 22:57:23,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:57:23,087 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:57:23,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:23,090 INFO L225 Difference]: With dead ends: 1808 [2021-06-05 22:57:23,090 INFO L226 Difference]: Without dead ends: 1787 [2021-06-05 22:57:23,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:57:23,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2021-06-05 22:57:23,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1518. [2021-06-05 22:57:23,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.4225444957152273) internal successors, (5192), 1517 states have internal predecessors, (5192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:23,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5192 transitions. [2021-06-05 22:57:23,126 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5192 transitions. Word has length 21 [2021-06-05 22:57:23,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:23,126 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 5192 transitions. [2021-06-05 22:57:23,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:23,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5192 transitions. [2021-06-05 22:57:23,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:57:23,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:23,130 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:23,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 22:57:23,345 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:23,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:23,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1455409559, now seen corresponding path program 8 times [2021-06-05 22:57:23,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:23,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966858108] [2021-06-05 22:57:23,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:57:23,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:23,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966858108] [2021-06-05 22:57:23,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966858108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:23,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551110014] [2021-06-05 22:57:23,396 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 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 [2021-06-05 22:57:23,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:57:23,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:23,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:57:23,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:57:23,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551110014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:23,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:23,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 22:57:23,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544037832] [2021-06-05 22:57:23,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:57:23,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:23,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:57:23,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:57:23,488 INFO L87 Difference]: Start difference. First operand 1518 states and 5192 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:23,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:23,545 INFO L93 Difference]: Finished difference Result 1722 states and 5770 transitions. [2021-06-05 22:57:23,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:57:23,545 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:57:23,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:23,549 INFO L225 Difference]: With dead ends: 1722 [2021-06-05 22:57:23,549 INFO L226 Difference]: Without dead ends: 1701 [2021-06-05 22:57:23,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:57:23,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2021-06-05 22:57:23,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1528. [2021-06-05 22:57:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 3.4282907662082516) internal successors, (5235), 1527 states have internal predecessors, (5235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:23,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 5235 transitions. [2021-06-05 22:57:23,599 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 5235 transitions. Word has length 21 [2021-06-05 22:57:23,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:23,599 INFO L482 AbstractCegarLoop]: Abstraction has 1528 states and 5235 transitions. [2021-06-05 22:57:23,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:23,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 5235 transitions. [2021-06-05 22:57:23,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:57:23,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:23,603 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:23,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 22:57:23,824 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:23,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:23,825 INFO L82 PathProgramCache]: Analyzing trace with hash -355017005, now seen corresponding path program 9 times [2021-06-05 22:57:23,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:23,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833854882] [2021-06-05 22:57:23,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:57:23,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:23,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833854882] [2021-06-05 22:57:23,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833854882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:23,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399666824] [2021-06-05 22:57:23,892 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:23,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:57:23,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:23,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:57:23,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:57:23,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399666824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:23,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:23,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 22:57:23,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068213066] [2021-06-05 22:57:23,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:57:23,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:23,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:57:23,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:57:23,973 INFO L87 Difference]: Start difference. First operand 1528 states and 5235 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:24,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:24,022 INFO L93 Difference]: Finished difference Result 1802 states and 6001 transitions. [2021-06-05 22:57:24,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:57:24,023 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:57:24,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:24,027 INFO L225 Difference]: With dead ends: 1802 [2021-06-05 22:57:24,027 INFO L226 Difference]: Without dead ends: 1781 [2021-06-05 22:57:24,028 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:57:24,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-06-05 22:57:24,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1544. [2021-06-05 22:57:24,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.436811406351264) internal successors, (5303), 1543 states have internal predecessors, (5303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:24,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5303 transitions. [2021-06-05 22:57:24,062 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5303 transitions. Word has length 21 [2021-06-05 22:57:24,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:24,062 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 5303 transitions. [2021-06-05 22:57:24,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:24,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5303 transitions. [2021-06-05 22:57:24,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:24,065 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:24,065 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:24,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:24,273 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:24,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:24,273 INFO L82 PathProgramCache]: Analyzing trace with hash -343789315, now seen corresponding path program 10 times [2021-06-05 22:57:24,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:24,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056411338] [2021-06-05 22:57:24,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:24,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:24,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:24,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056411338] [2021-06-05 22:57:24,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056411338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:24,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286778703] [2021-06-05 22:57:24,314 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 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 [2021-06-05 22:57:24,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:57:24,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:24,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:57:24,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:24,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:24,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286778703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:24,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:24,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:57:24,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967217214] [2021-06-05 22:57:24,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:57:24,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:24,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:57:24,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:57:24,423 INFO L87 Difference]: Start difference. First operand 1544 states and 5303 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:24,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:24,610 INFO L93 Difference]: Finished difference Result 4383 states and 14962 transitions. [2021-06-05 22:57:24,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:57:24,611 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:24,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:24,623 INFO L225 Difference]: With dead ends: 4383 [2021-06-05 22:57:24,623 INFO L226 Difference]: Without dead ends: 4383 [2021-06-05 22:57:24,623 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:57:24,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4383 states. [2021-06-05 22:57:24,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4383 to 2776. [2021-06-05 22:57:24,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2776 states, 2775 states have (on average 3.546666666666667) internal successors, (9842), 2775 states have internal predecessors, (9842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:24,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 9842 transitions. [2021-06-05 22:57:24,704 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 9842 transitions. Word has length 23 [2021-06-05 22:57:24,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:24,704 INFO L482 AbstractCegarLoop]: Abstraction has 2776 states and 9842 transitions. [2021-06-05 22:57:24,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:24,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 9842 transitions. [2021-06-05 22:57:24,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:24,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:24,710 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:24,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:24,925 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:24,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:24,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1351897977, now seen corresponding path program 1 times [2021-06-05 22:57:24,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:24,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733915128] [2021-06-05 22:57:24,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:24,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:24,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:24,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733915128] [2021-06-05 22:57:24,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733915128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:24,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852328755] [2021-06-05 22:57:24,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 22:57:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:24,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:57:24,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:25,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852328755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:25,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:25,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:57:25,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858178127] [2021-06-05 22:57:25,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:57:25,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:25,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:57:25,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:57:25,065 INFO L87 Difference]: Start difference. First operand 2776 states and 9842 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:25,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:25,302 INFO L93 Difference]: Finished difference Result 6576 states and 23416 transitions. [2021-06-05 22:57:25,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:57:25,302 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:25,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:25,318 INFO L225 Difference]: With dead ends: 6576 [2021-06-05 22:57:25,318 INFO L226 Difference]: Without dead ends: 6576 [2021-06-05 22:57:25,318 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:57:25,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6576 states. [2021-06-05 22:57:25,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6576 to 4642. [2021-06-05 22:57:25,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4642 states, 4641 states have (on average 3.6181857358327947) internal successors, (16792), 4641 states have internal predecessors, (16792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:25,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4642 states to 4642 states and 16792 transitions. [2021-06-05 22:57:25,448 INFO L78 Accepts]: Start accepts. Automaton has 4642 states and 16792 transitions. Word has length 23 [2021-06-05 22:57:25,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:25,448 INFO L482 AbstractCegarLoop]: Abstraction has 4642 states and 16792 transitions. [2021-06-05 22:57:25,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:25,449 INFO L276 IsEmpty]: Start isEmpty. Operand 4642 states and 16792 transitions. [2021-06-05 22:57:25,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:25,457 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:25,457 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:25,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 22:57:25,673 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:25,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:25,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1067499911, now seen corresponding path program 11 times [2021-06-05 22:57:25,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:25,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81782165] [2021-06-05 22:57:25,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:25,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:25,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81782165] [2021-06-05 22:57:25,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81782165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:25,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243343716] [2021-06-05 22:57:25,707 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 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 [2021-06-05 22:57:25,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:57:25,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:25,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:57:25,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:25,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243343716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:25,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:25,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:57:25,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678567742] [2021-06-05 22:57:25,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:57:25,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:25,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:57:25,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:57:25,817 INFO L87 Difference]: Start difference. First operand 4642 states and 16792 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:26,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:26,011 INFO L93 Difference]: Finished difference Result 6297 states and 22107 transitions. [2021-06-05 22:57:26,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:57:26,012 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:26,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:26,026 INFO L225 Difference]: With dead ends: 6297 [2021-06-05 22:57:26,026 INFO L226 Difference]: Without dead ends: 6289 [2021-06-05 22:57:26,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:57:26,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6289 states. [2021-06-05 22:57:26,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6289 to 5484. [2021-06-05 22:57:26,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5484 states, 5483 states have (on average 3.6122560641984314) internal successors, (19806), 5483 states have internal predecessors, (19806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:26,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5484 states to 5484 states and 19806 transitions. [2021-06-05 22:57:26,151 INFO L78 Accepts]: Start accepts. Automaton has 5484 states and 19806 transitions. Word has length 23 [2021-06-05 22:57:26,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:26,151 INFO L482 AbstractCegarLoop]: Abstraction has 5484 states and 19806 transitions. [2021-06-05 22:57:26,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:26,151 INFO L276 IsEmpty]: Start isEmpty. Operand 5484 states and 19806 transitions. [2021-06-05 22:57:26,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:26,161 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:26,162 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:26,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:26,366 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:26,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:26,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1815799673, now seen corresponding path program 2 times [2021-06-05 22:57:26,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:26,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487147732] [2021-06-05 22:57:26,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:26,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:26,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487147732] [2021-06-05 22:57:26,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487147732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:26,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446817312] [2021-06-05 22:57:26,409 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 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 [2021-06-05 22:57:26,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:57:26,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:26,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:57:26,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:26,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446817312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:26,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:26,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:57:26,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179927490] [2021-06-05 22:57:26,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:57:26,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:26,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:57:26,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:57:26,513 INFO L87 Difference]: Start difference. First operand 5484 states and 19806 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:26,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:26,784 INFO L93 Difference]: Finished difference Result 8906 states and 31694 transitions. [2021-06-05 22:57:26,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:57:26,784 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:26,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:26,799 INFO L225 Difference]: With dead ends: 8906 [2021-06-05 22:57:26,799 INFO L226 Difference]: Without dead ends: 8900 [2021-06-05 22:57:26,800 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:57:26,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8900 states. [2021-06-05 22:57:26,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8900 to 8072. [2021-06-05 22:57:26,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8072 states, 8071 states have (on average 3.62644034196506) internal successors, (29269), 8071 states have internal predecessors, (29269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:26,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 29269 transitions. [2021-06-05 22:57:26,969 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 29269 transitions. Word has length 23 [2021-06-05 22:57:26,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:26,969 INFO L482 AbstractCegarLoop]: Abstraction has 8072 states and 29269 transitions. [2021-06-05 22:57:26,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:26,969 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 29269 transitions. [2021-06-05 22:57:26,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:26,985 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:26,985 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:27,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 22:57:27,207 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:27,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:27,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1500610179, now seen corresponding path program 3 times [2021-06-05 22:57:27,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:27,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045161072] [2021-06-05 22:57:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:27,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:27,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:27,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045161072] [2021-06-05 22:57:27,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045161072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:27,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717338445] [2021-06-05 22:57:27,246 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 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 [2021-06-05 22:57:27,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:57:27,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:27,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:57:27,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:27,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717338445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:27,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:27,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:57:27,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561447421] [2021-06-05 22:57:27,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:57:27,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:27,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:57:27,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:57:27,342 INFO L87 Difference]: Start difference. First operand 8072 states and 29269 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:27,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:27,562 INFO L93 Difference]: Finished difference Result 12359 states and 43995 transitions. [2021-06-05 22:57:27,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:57:27,562 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:27,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:27,589 INFO L225 Difference]: With dead ends: 12359 [2021-06-05 22:57:27,589 INFO L226 Difference]: Without dead ends: 12359 [2021-06-05 22:57:27,590 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:57:27,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12359 states. [2021-06-05 22:57:27,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12359 to 11076. [2021-06-05 22:57:27,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11076 states, 11075 states have (on average 3.61941309255079) internal successors, (40085), 11075 states have internal predecessors, (40085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:27,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11076 states to 11076 states and 40085 transitions. [2021-06-05 22:57:27,977 INFO L78 Accepts]: Start accepts. Automaton has 11076 states and 40085 transitions. Word has length 23 [2021-06-05 22:57:27,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:27,978 INFO L482 AbstractCegarLoop]: Abstraction has 11076 states and 40085 transitions. [2021-06-05 22:57:27,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:27,978 INFO L276 IsEmpty]: Start isEmpty. Operand 11076 states and 40085 transitions. [2021-06-05 22:57:27,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:27,998 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:27,998 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:28,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:28,213 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:28,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:28,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1194375559, now seen corresponding path program 12 times [2021-06-05 22:57:28,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:28,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112879884] [2021-06-05 22:57:28,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:28,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:28,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:28,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112879884] [2021-06-05 22:57:28,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112879884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:28,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319989154] [2021-06-05 22:57:28,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:28,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:57:28,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:28,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:57:28,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:28,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:28,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319989154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:28,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:28,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:57:28,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872022681] [2021-06-05 22:57:28,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:57:28,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:28,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:57:28,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:57:28,333 INFO L87 Difference]: Start difference. First operand 11076 states and 40085 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:28,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:28,515 INFO L93 Difference]: Finished difference Result 11482 states and 41093 transitions. [2021-06-05 22:57:28,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:57:28,515 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:28,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:28,611 INFO L225 Difference]: With dead ends: 11482 [2021-06-05 22:57:28,611 INFO L226 Difference]: Without dead ends: 11472 [2021-06-05 22:57:28,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:57:28,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11472 states. [2021-06-05 22:57:28,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11472 to 11074. [2021-06-05 22:57:28,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11074 states, 11073 states have (on average 3.6193443511243566) internal successors, (40077), 11073 states have internal predecessors, (40077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:28,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11074 states to 11074 states and 40077 transitions. [2021-06-05 22:57:28,891 INFO L78 Accepts]: Start accepts. Automaton has 11074 states and 40077 transitions. Word has length 23 [2021-06-05 22:57:28,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:28,891 INFO L482 AbstractCegarLoop]: Abstraction has 11074 states and 40077 transitions. [2021-06-05 22:57:28,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:28,891 INFO L276 IsEmpty]: Start isEmpty. Operand 11074 states and 40077 transitions. [2021-06-05 22:57:28,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:28,911 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:28,911 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:29,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 22:57:29,129 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:29,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:29,129 INFO L82 PathProgramCache]: Analyzing trace with hash 713885521, now seen corresponding path program 4 times [2021-06-05 22:57:29,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:29,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923180127] [2021-06-05 22:57:29,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:29,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:29,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923180127] [2021-06-05 22:57:29,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923180127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:29,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259625908] [2021-06-05 22:57:29,166 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 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 [2021-06-05 22:57:29,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:57:29,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:29,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:57:29,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:29,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259625908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:29,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:29,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:57:29,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702424876] [2021-06-05 22:57:29,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:57:29,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:29,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:57:29,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:57:29,271 INFO L87 Difference]: Start difference. First operand 11074 states and 40077 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:29,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:29,577 INFO L93 Difference]: Finished difference Result 16493 states and 59103 transitions. [2021-06-05 22:57:29,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:57:29,577 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:29,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:29,613 INFO L225 Difference]: With dead ends: 16493 [2021-06-05 22:57:29,613 INFO L226 Difference]: Without dead ends: 16493 [2021-06-05 22:57:29,613 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:57:29,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16493 states. [2021-06-05 22:57:29,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16493 to 7965. [2021-06-05 22:57:29,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7965 states, 7964 states have (on average 3.605474635861376) internal successors, (28714), 7964 states have internal predecessors, (28714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:29,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7965 states to 7965 states and 28714 transitions. [2021-06-05 22:57:29,827 INFO L78 Accepts]: Start accepts. Automaton has 7965 states and 28714 transitions. Word has length 23 [2021-06-05 22:57:29,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:29,827 INFO L482 AbstractCegarLoop]: Abstraction has 7965 states and 28714 transitions. [2021-06-05 22:57:29,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:29,827 INFO L276 IsEmpty]: Start isEmpty. Operand 7965 states and 28714 transitions. [2021-06-05 22:57:29,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:29,839 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:29,839 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:30,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 22:57:30,041 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:30,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:30,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1264317309, now seen corresponding path program 13 times [2021-06-05 22:57:30,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:30,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021092495] [2021-06-05 22:57:30,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:30,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:30,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021092495] [2021-06-05 22:57:30,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021092495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:30,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231814098] [2021-06-05 22:57:30,064 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:30,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:57:30,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:30,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231814098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:30,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:30,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:57:30,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787567909] [2021-06-05 22:57:30,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:57:30,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:30,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:57:30,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:57:30,153 INFO L87 Difference]: Start difference. First operand 7965 states and 28714 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:30,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:30,458 INFO L93 Difference]: Finished difference Result 8444 states and 29934 transitions. [2021-06-05 22:57:30,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:57:30,459 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:30,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:30,473 INFO L225 Difference]: With dead ends: 8444 [2021-06-05 22:57:30,473 INFO L226 Difference]: Without dead ends: 8414 [2021-06-05 22:57:30,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:57:30,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8414 states. [2021-06-05 22:57:30,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8414 to 7984. [2021-06-05 22:57:30,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7984 states, 7983 states have (on average 3.5968933984717526) internal successors, (28714), 7983 states have internal predecessors, (28714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:30,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7984 states to 7984 states and 28714 transitions. [2021-06-05 22:57:30,643 INFO L78 Accepts]: Start accepts. Automaton has 7984 states and 28714 transitions. Word has length 23 [2021-06-05 22:57:30,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:30,643 INFO L482 AbstractCegarLoop]: Abstraction has 7984 states and 28714 transitions. [2021-06-05 22:57:30,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:30,643 INFO L276 IsEmpty]: Start isEmpty. Operand 7984 states and 28714 transitions. [2021-06-05 22:57:30,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:30,658 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:30,658 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:30,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 22:57:30,877 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:30,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:30,877 INFO L82 PathProgramCache]: Analyzing trace with hash -541652355, now seen corresponding path program 14 times [2021-06-05 22:57:30,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:30,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122734169] [2021-06-05 22:57:30,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:30,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:30,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122734169] [2021-06-05 22:57:30,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122734169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:30,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103844538] [2021-06-05 22:57:30,917 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 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 [2021-06-05 22:57:30,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:57:30,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:30,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:57:30,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:31,064 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:31,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103844538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:31,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:31,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 22:57:31,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585638632] [2021-06-05 22:57:31,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:57:31,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:31,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:57:31,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:57:31,066 INFO L87 Difference]: Start difference. First operand 7984 states and 28714 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:31,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:31,291 INFO L93 Difference]: Finished difference Result 8606 states and 30521 transitions. [2021-06-05 22:57:31,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:57:31,292 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:31,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:31,306 INFO L225 Difference]: With dead ends: 8606 [2021-06-05 22:57:31,306 INFO L226 Difference]: Without dead ends: 8543 [2021-06-05 22:57:31,306 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:57:31,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8543 states. [2021-06-05 22:57:31,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8543 to 8052. [2021-06-05 22:57:31,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8052 states, 8051 states have (on average 3.5914793193392125) internal successors, (28915), 8051 states have internal predecessors, (28915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:31,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8052 states to 8052 states and 28915 transitions. [2021-06-05 22:57:31,449 INFO L78 Accepts]: Start accepts. Automaton has 8052 states and 28915 transitions. Word has length 23 [2021-06-05 22:57:31,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:31,449 INFO L482 AbstractCegarLoop]: Abstraction has 8052 states and 28915 transitions. [2021-06-05 22:57:31,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:31,450 INFO L276 IsEmpty]: Start isEmpty. Operand 8052 states and 28915 transitions. [2021-06-05 22:57:31,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:31,460 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:31,460 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:31,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 22:57:31,660 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:31,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:31,661 INFO L82 PathProgramCache]: Analyzing trace with hash 732469559, now seen corresponding path program 5 times [2021-06-05 22:57:31,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:31,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880959987] [2021-06-05 22:57:31,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:31,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:31,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:31,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880959987] [2021-06-05 22:57:31,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880959987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:31,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938123325] [2021-06-05 22:57:31,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:31,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:57:31,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:31,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:57:31,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:31,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938123325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:31,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:31,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:57:31,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470008422] [2021-06-05 22:57:31,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:57:31,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:31,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:57:31,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:57:31,921 INFO L87 Difference]: Start difference. First operand 8052 states and 28915 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:32,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:32,068 INFO L93 Difference]: Finished difference Result 8205 states and 29288 transitions. [2021-06-05 22:57:32,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:57:32,069 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:32,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:32,081 INFO L225 Difference]: With dead ends: 8205 [2021-06-05 22:57:32,082 INFO L226 Difference]: Without dead ends: 8172 [2021-06-05 22:57:32,082 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 176.5ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:57:32,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8172 states. [2021-06-05 22:57:32,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8172 to 8077. [2021-06-05 22:57:32,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8077 states, 8076 states have (on average 3.5898959881129273) internal successors, (28992), 8076 states have internal predecessors, (28992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:32,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8077 states to 8077 states and 28992 transitions. [2021-06-05 22:57:32,187 INFO L78 Accepts]: Start accepts. Automaton has 8077 states and 28992 transitions. Word has length 23 [2021-06-05 22:57:32,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:32,187 INFO L482 AbstractCegarLoop]: Abstraction has 8077 states and 28992 transitions. [2021-06-05 22:57:32,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:32,187 INFO L276 IsEmpty]: Start isEmpty. Operand 8077 states and 28992 transitions. [2021-06-05 22:57:32,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:32,197 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:32,197 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:32,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 22:57:32,398 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:32,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:32,398 INFO L82 PathProgramCache]: Analyzing trace with hash -66570445, now seen corresponding path program 6 times [2021-06-05 22:57:32,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:32,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073719222] [2021-06-05 22:57:32,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:32,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:32,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:32,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073719222] [2021-06-05 22:57:32,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073719222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:32,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481238814] [2021-06-05 22:57:32,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:32,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:57:32,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:32,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:57:32,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:32,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:32,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481238814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:32,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:32,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 22:57:32,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338619776] [2021-06-05 22:57:32,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:57:32,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:32,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:57:32,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:57:32,635 INFO L87 Difference]: Start difference. First operand 8077 states and 28992 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-06-05 22:57:32,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:32,880 INFO L93 Difference]: Finished difference Result 10295 states and 36666 transitions. [2021-06-05 22:57:32,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:57:32,881 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 23 [2021-06-05 22:57:32,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:32,898 INFO L225 Difference]: With dead ends: 10295 [2021-06-05 22:57:32,898 INFO L226 Difference]: Without dead ends: 10247 [2021-06-05 22:57:32,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 127.1ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:57:32,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10247 states. [2021-06-05 22:57:33,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10247 to 8072. [2021-06-05 22:57:33,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8072 states, 8071 states have (on average 3.5903853301945237) internal successors, (28978), 8071 states have internal predecessors, (28978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:33,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 28978 transitions. [2021-06-05 22:57:33,027 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 28978 transitions. Word has length 23 [2021-06-05 22:57:33,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:33,027 INFO L482 AbstractCegarLoop]: Abstraction has 8072 states and 28978 transitions. [2021-06-05 22:57:33,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-06-05 22:57:33,028 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 28978 transitions. [2021-06-05 22:57:33,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:33,038 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:33,038 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:33,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 22:57:33,243 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:33,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:33,243 INFO L82 PathProgramCache]: Analyzing trace with hash -147969501, now seen corresponding path program 7 times [2021-06-05 22:57:33,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:33,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93577150] [2021-06-05 22:57:33,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:33,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:33,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93577150] [2021-06-05 22:57:33,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93577150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:33,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255156250] [2021-06-05 22:57:33,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:33,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:57:33,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:33,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255156250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:33,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:33,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:57:33,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147941747] [2021-06-05 22:57:33,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:57:33,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:33,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:57:33,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:57:33,469 INFO L87 Difference]: Start difference. First operand 8072 states and 28978 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) [2021-06-05 22:57:33,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:33,731 INFO L93 Difference]: Finished difference Result 10743 states and 38081 transitions. [2021-06-05 22:57:33,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:57:33,732 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 23 [2021-06-05 22:57:33,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:33,749 INFO L225 Difference]: With dead ends: 10743 [2021-06-05 22:57:33,749 INFO L226 Difference]: Without dead ends: 10695 [2021-06-05 22:57:33,750 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:57:33,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10695 states. [2021-06-05 22:57:33,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10695 to 8069. [2021-06-05 22:57:33,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8069 states, 8068 states have (on average 3.5909766980664353) internal successors, (28972), 8068 states have internal predecessors, (28972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:33,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8069 states to 8069 states and 28972 transitions. [2021-06-05 22:57:33,936 INFO L78 Accepts]: Start accepts. Automaton has 8069 states and 28972 transitions. Word has length 23 [2021-06-05 22:57:33,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:33,936 INFO L482 AbstractCegarLoop]: Abstraction has 8069 states and 28972 transitions. [2021-06-05 22:57:33,936 INFO L483 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) [2021-06-05 22:57:33,936 INFO L276 IsEmpty]: Start isEmpty. Operand 8069 states and 28972 transitions. [2021-06-05 22:57:33,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:33,947 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:33,947 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:34,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 22:57:34,167 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:34,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:34,167 INFO L82 PathProgramCache]: Analyzing trace with hash 265646431, now seen corresponding path program 8 times [2021-06-05 22:57:34,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:34,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358110913] [2021-06-05 22:57:34,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:34,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:34,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358110913] [2021-06-05 22:57:34,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358110913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:34,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002670039] [2021-06-05 22:57:34,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:34,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:57:34,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:34,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:57:34,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:34,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002670039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:34,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:34,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:57:34,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994475614] [2021-06-05 22:57:34,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:57:34,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:34,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:57:34,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:57:34,426 INFO L87 Difference]: Start difference. First operand 8069 states and 28972 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) [2021-06-05 22:57:34,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:34,700 INFO L93 Difference]: Finished difference Result 10785 states and 38212 transitions. [2021-06-05 22:57:34,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:57:34,700 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 23 [2021-06-05 22:57:34,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:34,719 INFO L225 Difference]: With dead ends: 10785 [2021-06-05 22:57:34,719 INFO L226 Difference]: Without dead ends: 10737 [2021-06-05 22:57:34,720 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 235.1ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:57:34,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10737 states. [2021-06-05 22:57:34,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10737 to 8068. [2021-06-05 22:57:34,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8068 states, 8067 states have (on average 3.591421842072642) internal successors, (28972), 8067 states have internal predecessors, (28972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:34,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8068 states to 8068 states and 28972 transitions. [2021-06-05 22:57:34,871 INFO L78 Accepts]: Start accepts. Automaton has 8068 states and 28972 transitions. Word has length 23 [2021-06-05 22:57:34,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:34,871 INFO L482 AbstractCegarLoop]: Abstraction has 8068 states and 28972 transitions. [2021-06-05 22:57:34,871 INFO L483 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) [2021-06-05 22:57:34,871 INFO L276 IsEmpty]: Start isEmpty. Operand 8068 states and 28972 transitions. [2021-06-05 22:57:34,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:34,882 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:34,882 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:35,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 22:57:35,082 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:35,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:35,083 INFO L82 PathProgramCache]: Analyzing trace with hash -418348287, now seen corresponding path program 9 times [2021-06-05 22:57:35,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:35,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581554946] [2021-06-05 22:57:35,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:35,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:35,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581554946] [2021-06-05 22:57:35,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581554946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:35,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285645468] [2021-06-05 22:57:35,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:35,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:57:35,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:35,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:57:35,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:35,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:35,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285645468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:35,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:35,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 22:57:35,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913990385] [2021-06-05 22:57:35,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:57:35,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:35,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:57:35,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:57:35,347 INFO L87 Difference]: Start difference. First operand 8068 states and 28972 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:35,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:35,549 INFO L93 Difference]: Finished difference Result 8314 states and 29600 transitions. [2021-06-05 22:57:35,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:57:35,549 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:35,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:35,564 INFO L225 Difference]: With dead ends: 8314 [2021-06-05 22:57:35,564 INFO L226 Difference]: Without dead ends: 8255 [2021-06-05 22:57:35,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:57:35,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8255 states. [2021-06-05 22:57:35,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8255 to 8137. [2021-06-05 22:57:35,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8137 states, 8136 states have (on average 3.587266470009833) internal successors, (29186), 8136 states have internal predecessors, (29186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:35,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8137 states to 8137 states and 29186 transitions. [2021-06-05 22:57:35,682 INFO L78 Accepts]: Start accepts. Automaton has 8137 states and 29186 transitions. Word has length 23 [2021-06-05 22:57:35,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:35,682 INFO L482 AbstractCegarLoop]: Abstraction has 8137 states and 29186 transitions. [2021-06-05 22:57:35,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:35,682 INFO L276 IsEmpty]: Start isEmpty. Operand 8137 states and 29186 transitions. [2021-06-05 22:57:35,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:35,695 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:35,695 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:35,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 22:57:35,909 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:35,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:35,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1217388291, now seen corresponding path program 10 times [2021-06-05 22:57:35,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:35,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531065359] [2021-06-05 22:57:35,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:35,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:35,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531065359] [2021-06-05 22:57:35,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531065359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:35,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503158989] [2021-06-05 22:57:35,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:36,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:57:36,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:36,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:57:36,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:36,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:36,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503158989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:36,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:36,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:57:36,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108404294] [2021-06-05 22:57:36,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:57:36,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:36,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:57:36,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:57:36,133 INFO L87 Difference]: Start difference. First operand 8137 states and 29186 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-06-05 22:57:36,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:36,298 INFO L93 Difference]: Finished difference Result 10367 states and 36899 transitions. [2021-06-05 22:57:36,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:57:36,298 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 23 [2021-06-05 22:57:36,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:36,315 INFO L225 Difference]: With dead ends: 10367 [2021-06-05 22:57:36,316 INFO L226 Difference]: Without dead ends: 10321 [2021-06-05 22:57:36,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:57:36,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10321 states. [2021-06-05 22:57:36,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10321 to 8140. [2021-06-05 22:57:36,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8140 states, 8139 states have (on average 3.5897530409141174) internal successors, (29217), 8139 states have internal predecessors, (29217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:36,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8140 states to 8140 states and 29217 transitions. [2021-06-05 22:57:36,457 INFO L78 Accepts]: Start accepts. Automaton has 8140 states and 29217 transitions. Word has length 23 [2021-06-05 22:57:36,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:36,457 INFO L482 AbstractCegarLoop]: Abstraction has 8140 states and 29217 transitions. [2021-06-05 22:57:36,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-06-05 22:57:36,457 INFO L276 IsEmpty]: Start isEmpty. Operand 8140 states and 29217 transitions. [2021-06-05 22:57:36,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:36,467 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:36,467 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:36,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:36,668 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:36,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:36,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1298787347, now seen corresponding path program 11 times [2021-06-05 22:57:36,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:36,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001084007] [2021-06-05 22:57:36,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:36,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:36,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001084007] [2021-06-05 22:57:36,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001084007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:36,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040530545] [2021-06-05 22:57:36,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:36,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:57:36,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:36,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:57:36,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:36,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040530545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:36,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:36,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 22:57:36,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102588177] [2021-06-05 22:57:36,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:57:36,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:36,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:57:36,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:57:36,935 INFO L87 Difference]: Start difference. First operand 8140 states and 29217 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-06-05 22:57:37,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:37,222 INFO L93 Difference]: Finished difference Result 10852 states and 38322 transitions. [2021-06-05 22:57:37,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:57:37,223 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 23 [2021-06-05 22:57:37,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:37,243 INFO L225 Difference]: With dead ends: 10852 [2021-06-05 22:57:37,243 INFO L226 Difference]: Without dead ends: 10785 [2021-06-05 22:57:37,243 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 218.0ms TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:57:37,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10785 states. [2021-06-05 22:57:37,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10785 to 8157. [2021-06-05 22:57:37,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8157 states, 8156 states have (on average 3.5922020598332516) internal successors, (29298), 8156 states have internal predecessors, (29298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:37,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8157 states to 8157 states and 29298 transitions. [2021-06-05 22:57:37,394 INFO L78 Accepts]: Start accepts. Automaton has 8157 states and 29298 transitions. Word has length 23 [2021-06-05 22:57:37,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:37,394 INFO L482 AbstractCegarLoop]: Abstraction has 8157 states and 29298 transitions. [2021-06-05 22:57:37,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-06-05 22:57:37,394 INFO L276 IsEmpty]: Start isEmpty. Operand 8157 states and 29298 transitions. [2021-06-05 22:57:37,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:37,405 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:37,405 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:37,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 22:57:37,605 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:37,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:37,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1071003837, now seen corresponding path program 12 times [2021-06-05 22:57:37,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:37,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464630113] [2021-06-05 22:57:37,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:37,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:37,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464630113] [2021-06-05 22:57:37,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464630113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:37,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809021552] [2021-06-05 22:57:37,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:37,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:57:37,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:37,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:57:37,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:37,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:37,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809021552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:37,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:37,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 22:57:37,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907083549] [2021-06-05 22:57:37,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:57:37,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:37,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:57:37,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:57:37,773 INFO L87 Difference]: Start difference. First operand 8157 states and 29298 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:37,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:37,938 INFO L93 Difference]: Finished difference Result 8303 states and 29650 transitions. [2021-06-05 22:57:37,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:57:37,939 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:37,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:37,954 INFO L225 Difference]: With dead ends: 8303 [2021-06-05 22:57:37,954 INFO L226 Difference]: Without dead ends: 8248 [2021-06-05 22:57:37,955 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:57:37,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8248 states. [2021-06-05 22:57:38,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8248 to 8175. [2021-06-05 22:57:38,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8175 states, 8174 states have (on average 3.5910203082945924) internal successors, (29353), 8174 states have internal predecessors, (29353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:38,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8175 states to 8175 states and 29353 transitions. [2021-06-05 22:57:38,068 INFO L78 Accepts]: Start accepts. Automaton has 8175 states and 29353 transitions. Word has length 23 [2021-06-05 22:57:38,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:38,068 INFO L482 AbstractCegarLoop]: Abstraction has 8175 states and 29353 transitions. [2021-06-05 22:57:38,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:38,068 INFO L276 IsEmpty]: Start isEmpty. Operand 8175 states and 29353 transitions. [2021-06-05 22:57:38,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:38,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:38,078 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:38,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:38,279 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:38,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:38,279 INFO L82 PathProgramCache]: Analyzing trace with hash 271963833, now seen corresponding path program 13 times [2021-06-05 22:57:38,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:38,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104369511] [2021-06-05 22:57:38,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:38,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:38,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:38,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104369511] [2021-06-05 22:57:38,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104369511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:38,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121377555] [2021-06-05 22:57:38,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:38,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:57:38,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:38,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121377555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:38,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:38,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 22:57:38,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399838652] [2021-06-05 22:57:38,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:57:38,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:38,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:57:38,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:57:38,527 INFO L87 Difference]: Start difference. First operand 8175 states and 29353 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:38,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:38,695 INFO L93 Difference]: Finished difference Result 10332 states and 36818 transitions. [2021-06-05 22:57:38,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:57:38,696 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:38,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:38,713 INFO L225 Difference]: With dead ends: 10332 [2021-06-05 22:57:38,714 INFO L226 Difference]: Without dead ends: 10286 [2021-06-05 22:57:38,714 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:57:38,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10286 states. [2021-06-05 22:57:38,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10286 to 8171. [2021-06-05 22:57:38,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8171 states, 8170 states have (on average 3.591309669522644) internal successors, (29341), 8170 states have internal predecessors, (29341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:38,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8171 states to 8171 states and 29341 transitions. [2021-06-05 22:57:38,845 INFO L78 Accepts]: Start accepts. Automaton has 8171 states and 29341 transitions. Word has length 23 [2021-06-05 22:57:38,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:38,846 INFO L482 AbstractCegarLoop]: Abstraction has 8171 states and 29341 transitions. [2021-06-05 22:57:38,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:38,846 INFO L276 IsEmpty]: Start isEmpty. Operand 8171 states and 29341 transitions. [2021-06-05 22:57:38,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:38,856 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:38,856 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:39,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 22:57:39,062 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:39,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:39,062 INFO L82 PathProgramCache]: Analyzing trace with hash 11839967, now seen corresponding path program 14 times [2021-06-05 22:57:39,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:39,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977840883] [2021-06-05 22:57:39,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:39,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:39,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:39,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:39,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977840883] [2021-06-05 22:57:39,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977840883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:39,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961719172] [2021-06-05 22:57:39,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:39,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:57:39,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:39,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:57:39,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:39,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:39,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961719172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:39,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:39,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 22:57:39,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868807434] [2021-06-05 22:57:39,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:57:39,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:39,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:57:39,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:57:39,267 INFO L87 Difference]: Start difference. First operand 8171 states and 29341 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:39,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:39,425 INFO L93 Difference]: Finished difference Result 8275 states and 29573 transitions. [2021-06-05 22:57:39,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:57:39,426 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:39,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:39,440 INFO L225 Difference]: With dead ends: 8275 [2021-06-05 22:57:39,440 INFO L226 Difference]: Without dead ends: 8232 [2021-06-05 22:57:39,441 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:57:39,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8232 states. [2021-06-05 22:57:39,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8232 to 8175. [2021-06-05 22:57:39,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8175 states, 8174 states have (on average 3.5902862735502814) internal successors, (29347), 8174 states have internal predecessors, (29347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:39,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8175 states to 8175 states and 29347 transitions. [2021-06-05 22:57:39,554 INFO L78 Accepts]: Start accepts. Automaton has 8175 states and 29347 transitions. Word has length 23 [2021-06-05 22:57:39,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:39,554 INFO L482 AbstractCegarLoop]: Abstraction has 8175 states and 29347 transitions. [2021-06-05 22:57:39,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:39,554 INFO L276 IsEmpty]: Start isEmpty. Operand 8175 states and 29347 transitions. [2021-06-05 22:57:39,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:39,564 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:39,565 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:39,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 22:57:39,766 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:39,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:39,766 INFO L82 PathProgramCache]: Analyzing trace with hash 33595821, now seen corresponding path program 15 times [2021-06-05 22:57:39,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:39,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940509144] [2021-06-05 22:57:39,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:39,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:39,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:39,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940509144] [2021-06-05 22:57:39,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940509144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:39,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868192473] [2021-06-05 22:57:39,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:39,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:57:39,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:39,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:57:39,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:39,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868192473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:39,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:39,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 22:57:39,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970738940] [2021-06-05 22:57:39,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:57:39,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:39,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:57:39,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:57:39,925 INFO L87 Difference]: Start difference. First operand 8175 states and 29347 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:40,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:40,124 INFO L93 Difference]: Finished difference Result 10463 states and 37022 transitions. [2021-06-05 22:57:40,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:57:40,124 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:40,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:40,143 INFO L225 Difference]: With dead ends: 10463 [2021-06-05 22:57:40,143 INFO L226 Difference]: Without dead ends: 10463 [2021-06-05 22:57:40,143 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:57:40,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10463 states. [2021-06-05 22:57:40,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10463 to 8533. [2021-06-05 22:57:40,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8533 states, 8532 states have (on average 3.587318330989217) internal successors, (30607), 8532 states have internal predecessors, (30607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:40,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8533 states to 8533 states and 30607 transitions. [2021-06-05 22:57:40,276 INFO L78 Accepts]: Start accepts. Automaton has 8533 states and 30607 transitions. Word has length 23 [2021-06-05 22:57:40,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:40,276 INFO L482 AbstractCegarLoop]: Abstraction has 8533 states and 30607 transitions. [2021-06-05 22:57:40,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:40,276 INFO L276 IsEmpty]: Start isEmpty. Operand 8533 states and 30607 transitions. [2021-06-05 22:57:40,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:40,287 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:40,287 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:40,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:40,489 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:40,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:40,489 INFO L82 PathProgramCache]: Analyzing trace with hash -108973523, now seen corresponding path program 16 times [2021-06-05 22:57:40,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:40,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831629725] [2021-06-05 22:57:40,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:40,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:40,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831629725] [2021-06-05 22:57:40,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831629725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:40,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278077357] [2021-06-05 22:57:40,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:40,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:57:40,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:40,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:57:40,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:40,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278077357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:40,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:40,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 22:57:40,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654332490] [2021-06-05 22:57:40,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:57:40,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:40,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:57:40,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:57:40,657 INFO L87 Difference]: Start difference. First operand 8533 states and 30607 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:40,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:40,915 INFO L93 Difference]: Finished difference Result 18599 states and 66456 transitions. [2021-06-05 22:57:40,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:57:40,916 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:40,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:40,950 INFO L225 Difference]: With dead ends: 18599 [2021-06-05 22:57:40,950 INFO L226 Difference]: Without dead ends: 18599 [2021-06-05 22:57:40,950 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:57:40,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18599 states. [2021-06-05 22:57:41,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18599 to 14058. [2021-06-05 22:57:41,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14058 states, 14057 states have (on average 3.598634132460696) internal successors, (50586), 14057 states have internal predecessors, (50586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:41,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14058 states to 14058 states and 50586 transitions. [2021-06-05 22:57:41,290 INFO L78 Accepts]: Start accepts. Automaton has 14058 states and 50586 transitions. Word has length 23 [2021-06-05 22:57:41,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:41,290 INFO L482 AbstractCegarLoop]: Abstraction has 14058 states and 50586 transitions. [2021-06-05 22:57:41,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:41,290 INFO L276 IsEmpty]: Start isEmpty. Operand 14058 states and 50586 transitions. [2021-06-05 22:57:41,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:41,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:41,305 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:41,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 22:57:41,505 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:41,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:41,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1805708085, now seen corresponding path program 17 times [2021-06-05 22:57:41,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:41,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242229350] [2021-06-05 22:57:41,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:41,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:41,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242229350] [2021-06-05 22:57:41,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242229350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:41,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243812006] [2021-06-05 22:57:41,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:41,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:57:41,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:41,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:57:41,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:41,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:41,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243812006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:41,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:41,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 22:57:41,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114217096] [2021-06-05 22:57:41,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:57:41,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:41,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:57:41,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:57:41,649 INFO L87 Difference]: Start difference. First operand 14058 states and 50586 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:41,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:41,857 INFO L93 Difference]: Finished difference Result 14997 states and 53374 transitions. [2021-06-05 22:57:41,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:57:41,857 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:41,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:41,884 INFO L225 Difference]: With dead ends: 14997 [2021-06-05 22:57:41,884 INFO L226 Difference]: Without dead ends: 14997 [2021-06-05 22:57:41,884 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:57:41,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14997 states. [2021-06-05 22:57:42,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14997 to 14058. [2021-06-05 22:57:42,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14058 states, 14057 states have (on average 3.598634132460696) internal successors, (50586), 14057 states have internal predecessors, (50586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:42,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14058 states to 14058 states and 50586 transitions. [2021-06-05 22:57:42,092 INFO L78 Accepts]: Start accepts. Automaton has 14058 states and 50586 transitions. Word has length 23 [2021-06-05 22:57:42,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:42,092 INFO L482 AbstractCegarLoop]: Abstraction has 14058 states and 50586 transitions. [2021-06-05 22:57:42,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:42,092 INFO L276 IsEmpty]: Start isEmpty. Operand 14058 states and 50586 transitions. [2021-06-05 22:57:42,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:42,106 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:42,106 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:42,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:42,307 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:42,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:42,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1550642503, now seen corresponding path program 18 times [2021-06-05 22:57:42,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:42,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678060732] [2021-06-05 22:57:42,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:42,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:42,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678060732] [2021-06-05 22:57:42,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678060732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:42,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2686259] [2021-06-05 22:57:42,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:42,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:57:42,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:42,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:57:42,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:42,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2686259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:42,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:42,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:57:42,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417263503] [2021-06-05 22:57:42,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:57:42,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:42,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:57:42,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:57:42,495 INFO L87 Difference]: Start difference. First operand 14058 states and 50586 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:42,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:42,790 INFO L93 Difference]: Finished difference Result 25256 states and 90164 transitions. [2021-06-05 22:57:42,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:57:42,790 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:42,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:42,840 INFO L225 Difference]: With dead ends: 25256 [2021-06-05 22:57:42,840 INFO L226 Difference]: Without dead ends: 25256 [2021-06-05 22:57:42,840 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 170.2ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:57:42,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25256 states. [2021-06-05 22:57:43,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25256 to 14108. [2021-06-05 22:57:43,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14108 states, 14107 states have (on average 3.5999149358474516) internal successors, (50784), 14107 states have internal predecessors, (50784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:43,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14108 states to 14108 states and 50784 transitions. [2021-06-05 22:57:43,127 INFO L78 Accepts]: Start accepts. Automaton has 14108 states and 50784 transitions. Word has length 23 [2021-06-05 22:57:43,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:43,127 INFO L482 AbstractCegarLoop]: Abstraction has 14108 states and 50784 transitions. [2021-06-05 22:57:43,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:43,127 INFO L276 IsEmpty]: Start isEmpty. Operand 14108 states and 50784 transitions. [2021-06-05 22:57:43,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:43,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:43,142 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:43,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 22:57:43,343 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:43,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:43,343 INFO L82 PathProgramCache]: Analyzing trace with hash -530911043, now seen corresponding path program 19 times [2021-06-05 22:57:43,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:43,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800757760] [2021-06-05 22:57:43,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:43,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:43,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:43,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800757760] [2021-06-05 22:57:43,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800757760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:43,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119187450] [2021-06-05 22:57:43,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 22:57:43,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:43,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:57:43,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:43,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119187450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:43,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:43,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 22:57:43,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895658804] [2021-06-05 22:57:43,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:57:43,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:43,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:57:43,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:57:43,502 INFO L87 Difference]: Start difference. First operand 14108 states and 50784 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:43,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:43,751 INFO L93 Difference]: Finished difference Result 21867 states and 76984 transitions. [2021-06-05 22:57:43,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:57:43,751 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:43,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:43,790 INFO L225 Difference]: With dead ends: 21867 [2021-06-05 22:57:43,790 INFO L226 Difference]: Without dead ends: 21867 [2021-06-05 22:57:43,790 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:57:43,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21867 states. [2021-06-05 22:57:44,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21867 to 14162. [2021-06-05 22:57:44,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14162 states, 14161 states have (on average 3.599957630110868) internal successors, (50979), 14161 states have internal predecessors, (50979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:44,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14162 states to 14162 states and 50979 transitions. [2021-06-05 22:57:44,148 INFO L78 Accepts]: Start accepts. Automaton has 14162 states and 50979 transitions. Word has length 23 [2021-06-05 22:57:44,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:44,149 INFO L482 AbstractCegarLoop]: Abstraction has 14162 states and 50979 transitions. [2021-06-05 22:57:44,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:44,149 INFO L276 IsEmpty]: Start isEmpty. Operand 14162 states and 50979 transitions. [2021-06-05 22:57:44,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:44,164 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:44,164 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:44,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 22:57:44,365 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:44,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:44,365 INFO L82 PathProgramCache]: Analyzing trace with hash 851877945, now seen corresponding path program 20 times [2021-06-05 22:57:44,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:44,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374987053] [2021-06-05 22:57:44,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:44,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:44,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:44,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374987053] [2021-06-05 22:57:44,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374987053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:44,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762896886] [2021-06-05 22:57:44,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:44,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:57:44,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:44,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:57:44,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:44,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762896886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:44,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:44,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 22:57:44,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833913964] [2021-06-05 22:57:44,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:57:44,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:44,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:57:44,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:57:44,584 INFO L87 Difference]: Start difference. First operand 14162 states and 50979 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-06-05 22:57:45,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:45,039 INFO L93 Difference]: Finished difference Result 27150 states and 96606 transitions. [2021-06-05 22:57:45,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:57:45,040 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 23 [2021-06-05 22:57:45,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:45,126 INFO L225 Difference]: With dead ends: 27150 [2021-06-05 22:57:45,126 INFO L226 Difference]: Without dead ends: 27144 [2021-06-05 22:57:45,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=186, Invalid=320, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:57:45,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27144 states. [2021-06-05 22:57:45,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27144 to 14874. [2021-06-05 22:57:45,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14874 states, 14873 states have (on average 3.604921670140523) internal successors, (53616), 14873 states have internal predecessors, (53616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:45,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14874 states to 14874 states and 53616 transitions. [2021-06-05 22:57:45,638 INFO L78 Accepts]: Start accepts. Automaton has 14874 states and 53616 transitions. Word has length 23 [2021-06-05 22:57:45,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:45,638 INFO L482 AbstractCegarLoop]: Abstraction has 14874 states and 53616 transitions. [2021-06-05 22:57:45,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-06-05 22:57:45,638 INFO L276 IsEmpty]: Start isEmpty. Operand 14874 states and 53616 transitions. [2021-06-05 22:57:45,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:45,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:45,662 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:45,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:45,863 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:45,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:45,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1871609405, now seen corresponding path program 21 times [2021-06-05 22:57:45,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:45,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102189049] [2021-06-05 22:57:45,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:45,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:45,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102189049] [2021-06-05 22:57:45,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102189049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:45,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161026074] [2021-06-05 22:57:45,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:45,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:57:45,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:45,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:57:45,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:46,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:46,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161026074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:46,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:46,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:57:46,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246916487] [2021-06-05 22:57:46,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:57:46,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:46,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:57:46,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:57:46,044 INFO L87 Difference]: Start difference. First operand 14874 states and 53616 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:46,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:46,419 INFO L93 Difference]: Finished difference Result 22680 states and 79637 transitions. [2021-06-05 22:57:46,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:57:46,419 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:46,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:46,478 INFO L225 Difference]: With dead ends: 22680 [2021-06-05 22:57:46,478 INFO L226 Difference]: Without dead ends: 22680 [2021-06-05 22:57:46,478 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 262.6ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:57:46,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22680 states. [2021-06-05 22:57:46,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22680 to 14862. [2021-06-05 22:57:46,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14862 states, 14861 states have (on average 3.6048045219029676) internal successors, (53571), 14861 states have internal predecessors, (53571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:46,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14862 states to 14862 states and 53571 transitions. [2021-06-05 22:57:46,807 INFO L78 Accepts]: Start accepts. Automaton has 14862 states and 53571 transitions. Word has length 23 [2021-06-05 22:57:46,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:46,807 INFO L482 AbstractCegarLoop]: Abstraction has 14862 states and 53571 transitions. [2021-06-05 22:57:46,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:46,807 INFO L276 IsEmpty]: Start isEmpty. Operand 14862 states and 53571 transitions. [2021-06-05 22:57:46,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:46,825 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:46,825 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:47,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 22:57:47,026 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:47,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:47,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1111272131, now seen corresponding path program 22 times [2021-06-05 22:57:47,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:47,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367386496] [2021-06-05 22:57:47,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:47,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:47,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367386496] [2021-06-05 22:57:47,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367386496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:47,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67786636] [2021-06-05 22:57:47,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:47,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:57:47,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:47,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:57:47,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:47,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67786636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:47,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:47,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 22:57:47,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409532952] [2021-06-05 22:57:47,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:57:47,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:47,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:57:47,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:57:47,210 INFO L87 Difference]: Start difference. First operand 14862 states and 53571 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:47,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:47,490 INFO L93 Difference]: Finished difference Result 19297 states and 68666 transitions. [2021-06-05 22:57:47,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:57:47,490 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:47,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:47,526 INFO L225 Difference]: With dead ends: 19297 [2021-06-05 22:57:47,526 INFO L226 Difference]: Without dead ends: 19297 [2021-06-05 22:57:47,527 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 158.8ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:57:47,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19297 states. [2021-06-05 22:57:47,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19297 to 14862. [2021-06-05 22:57:47,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14862 states, 14861 states have (on average 3.6048045219029676) internal successors, (53571), 14861 states have internal predecessors, (53571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:47,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14862 states to 14862 states and 53571 transitions. [2021-06-05 22:57:47,773 INFO L78 Accepts]: Start accepts. Automaton has 14862 states and 53571 transitions. Word has length 23 [2021-06-05 22:57:47,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:47,773 INFO L482 AbstractCegarLoop]: Abstraction has 14862 states and 53571 transitions. [2021-06-05 22:57:47,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:47,773 INFO L276 IsEmpty]: Start isEmpty. Operand 14862 states and 53571 transitions. [2021-06-05 22:57:47,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:47,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:47,791 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:47,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 22:57:47,992 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:47,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:47,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1359329409, now seen corresponding path program 23 times [2021-06-05 22:57:47,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:47,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951893123] [2021-06-05 22:57:47,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:48,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:48,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951893123] [2021-06-05 22:57:48,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951893123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:48,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793754405] [2021-06-05 22:57:48,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:48,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:57:48,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:48,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:57:48,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:48,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793754405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:48,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:48,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 22:57:48,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75904205] [2021-06-05 22:57:48,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:57:48,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:48,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:57:48,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:57:48,169 INFO L87 Difference]: Start difference. First operand 14862 states and 53571 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:48,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:48,460 INFO L93 Difference]: Finished difference Result 33945 states and 122633 transitions. [2021-06-05 22:57:48,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:57:48,461 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:48,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:48,532 INFO L225 Difference]: With dead ends: 33945 [2021-06-05 22:57:48,532 INFO L226 Difference]: Without dead ends: 33935 [2021-06-05 22:57:48,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:57:48,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33935 states. [2021-06-05 22:57:48,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33935 to 26076. [2021-06-05 22:57:49,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26076 states, 26075 states have (on average 3.595091083413231) internal successors, (93742), 26075 states have internal predecessors, (93742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:49,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26076 states to 26076 states and 93742 transitions. [2021-06-05 22:57:49,089 INFO L78 Accepts]: Start accepts. Automaton has 26076 states and 93742 transitions. Word has length 23 [2021-06-05 22:57:49,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:49,089 INFO L482 AbstractCegarLoop]: Abstraction has 26076 states and 93742 transitions. [2021-06-05 22:57:49,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:49,089 INFO L276 IsEmpty]: Start isEmpty. Operand 26076 states and 93742 transitions. [2021-06-05 22:57:49,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:49,114 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:49,114 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:49,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 22:57:49,315 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:49,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:49,315 INFO L82 PathProgramCache]: Analyzing trace with hash -337405153, now seen corresponding path program 24 times [2021-06-05 22:57:49,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:49,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449379465] [2021-06-05 22:57:49,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:49,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:49,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:49,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449379465] [2021-06-05 22:57:49,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449379465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:49,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255022367] [2021-06-05 22:57:49,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:49,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:57:49,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:49,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:57:49,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:49,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255022367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:49,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:49,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 22:57:49,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333979658] [2021-06-05 22:57:49,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:57:49,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:49,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:57:49,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:57:49,446 INFO L87 Difference]: Start difference. First operand 26076 states and 93742 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:49,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:49,701 INFO L93 Difference]: Finished difference Result 26734 states and 95761 transitions. [2021-06-05 22:57:49,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:57:49,701 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:49,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:49,756 INFO L225 Difference]: With dead ends: 26734 [2021-06-05 22:57:49,756 INFO L226 Difference]: Without dead ends: 26734 [2021-06-05 22:57:49,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:57:49,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26734 states. [2021-06-05 22:57:50,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26734 to 26088. [2021-06-05 22:57:50,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26088 states, 26087 states have (on average 3.5951240081266533) internal successors, (93786), 26087 states have internal predecessors, (93786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:50,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26088 states to 26088 states and 93786 transitions. [2021-06-05 22:57:50,180 INFO L78 Accepts]: Start accepts. Automaton has 26088 states and 93786 transitions. Word has length 23 [2021-06-05 22:57:50,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:50,180 INFO L482 AbstractCegarLoop]: Abstraction has 26088 states and 93786 transitions. [2021-06-05 22:57:50,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:50,180 INFO L276 IsEmpty]: Start isEmpty. Operand 26088 states and 93786 transitions. [2021-06-05 22:57:50,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:50,205 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:50,205 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:50,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:50,406 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:50,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:50,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1911852527, now seen corresponding path program 15 times [2021-06-05 22:57:50,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:50,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587666519] [2021-06-05 22:57:50,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:50,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:50,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587666519] [2021-06-05 22:57:50,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587666519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:50,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247899155] [2021-06-05 22:57:50,430 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 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 [2021-06-05 22:57:50,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:57:50,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:50,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:57:50,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:50,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:50,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247899155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:50,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:50,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:57:50,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3446524] [2021-06-05 22:57:50,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:57:50,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:50,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:57:50,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:57:50,536 INFO L87 Difference]: Start difference. First operand 26088 states and 93786 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:50,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:50,808 INFO L93 Difference]: Finished difference Result 27275 states and 97322 transitions. [2021-06-05 22:57:50,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:57:50,808 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:50,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:50,863 INFO L225 Difference]: With dead ends: 27275 [2021-06-05 22:57:50,863 INFO L226 Difference]: Without dead ends: 27223 [2021-06-05 22:57:50,863 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:57:50,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27223 states. [2021-06-05 22:57:51,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27223 to 26365. [2021-06-05 22:57:51,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26365 states, 26364 states have (on average 3.5933469883174025) internal successors, (94735), 26364 states have internal predecessors, (94735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:51,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26365 states to 26365 states and 94735 transitions. [2021-06-05 22:57:51,310 INFO L78 Accepts]: Start accepts. Automaton has 26365 states and 94735 transitions. Word has length 23 [2021-06-05 22:57:51,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:51,310 INFO L482 AbstractCegarLoop]: Abstraction has 26365 states and 94735 transitions. [2021-06-05 22:57:51,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:51,310 INFO L276 IsEmpty]: Start isEmpty. Operand 26365 states and 94735 transitions. [2021-06-05 22:57:51,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:51,335 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:51,335 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:51,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:51,536 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:51,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:51,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1784976879, now seen corresponding path program 16 times [2021-06-05 22:57:51,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:51,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195325579] [2021-06-05 22:57:51,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:51,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:51,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195325579] [2021-06-05 22:57:51,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195325579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:51,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97580761] [2021-06-05 22:57:51,561 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 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 [2021-06-05 22:57:51,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:57:51,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:51,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:57:51,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:51,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97580761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:51,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:51,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:57:51,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179446555] [2021-06-05 22:57:51,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:57:51,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:51,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:57:51,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:57:51,656 INFO L87 Difference]: Start difference. First operand 26365 states and 94735 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:51,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:51,984 INFO L93 Difference]: Finished difference Result 26807 states and 95786 transitions. [2021-06-05 22:57:51,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:57:51,984 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:51,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:52,060 INFO L225 Difference]: With dead ends: 26807 [2021-06-05 22:57:52,060 INFO L226 Difference]: Without dead ends: 26797 [2021-06-05 22:57:52,061 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:57:52,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26797 states. [2021-06-05 22:57:52,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26797 to 26277. [2021-06-05 22:57:52,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26277 states, 26276 states have (on average 3.593811843507383) internal successors, (94431), 26276 states have internal predecessors, (94431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:52,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26277 states to 26277 states and 94431 transitions. [2021-06-05 22:57:52,710 INFO L78 Accepts]: Start accepts. Automaton has 26277 states and 94431 transitions. Word has length 23 [2021-06-05 22:57:52,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:52,710 INFO L482 AbstractCegarLoop]: Abstraction has 26277 states and 94431 transitions. [2021-06-05 22:57:52,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:52,710 INFO L276 IsEmpty]: Start isEmpty. Operand 26277 states and 94431 transitions. [2021-06-05 22:57:52,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:52,734 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:52,734 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:52,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:52,937 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:52,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:52,937 INFO L82 PathProgramCache]: Analyzing trace with hash -51297549, now seen corresponding path program 17 times [2021-06-05 22:57:52,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:52,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913276384] [2021-06-05 22:57:52,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:52,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:52,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913276384] [2021-06-05 22:57:52,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913276384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:52,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829681851] [2021-06-05 22:57:52,962 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 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 [2021-06-05 22:57:52,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:57:52,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:52,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:57:52,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:53,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829681851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:53,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:53,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:57:53,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324361155] [2021-06-05 22:57:53,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:57:53,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:53,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:57:53,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:57:53,050 INFO L87 Difference]: Start difference. First operand 26277 states and 94431 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:53,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:53,365 INFO L93 Difference]: Finished difference Result 26602 states and 95215 transitions. [2021-06-05 22:57:53,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:57:53,366 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:53,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:53,418 INFO L225 Difference]: With dead ends: 26602 [2021-06-05 22:57:53,418 INFO L226 Difference]: Without dead ends: 26542 [2021-06-05 22:57:53,418 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:57:53,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26542 states. [2021-06-05 22:57:53,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26542 to 26119. [2021-06-05 22:57:53,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26119 states, 26118 states have (on average 3.5962937437782374) internal successors, (93928), 26118 states have internal predecessors, (93928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:53,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26119 states to 26119 states and 93928 transitions. [2021-06-05 22:57:53,849 INFO L78 Accepts]: Start accepts. Automaton has 26119 states and 93928 transitions. Word has length 23 [2021-06-05 22:57:53,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:53,849 INFO L482 AbstractCegarLoop]: Abstraction has 26119 states and 93928 transitions. [2021-06-05 22:57:53,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:53,849 INFO L276 IsEmpty]: Start isEmpty. Operand 26119 states and 93928 transitions. [2021-06-05 22:57:53,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:53,873 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:53,873 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:54,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:54,074 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:54,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:54,074 INFO L82 PathProgramCache]: Analyzing trace with hash 837128115, now seen corresponding path program 18 times [2021-06-05 22:57:54,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:54,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594842082] [2021-06-05 22:57:54,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:54,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:54,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594842082] [2021-06-05 22:57:54,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594842082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:54,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785420821] [2021-06-05 22:57:54,099 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 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 [2021-06-05 22:57:54,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:57:54,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:54,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:57:54,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:54,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785420821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:54,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:54,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:57:54,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085883176] [2021-06-05 22:57:54,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:57:54,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:54,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:57:54,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:57:54,209 INFO L87 Difference]: Start difference. First operand 26119 states and 93928 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:54,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:54,502 INFO L93 Difference]: Finished difference Result 26987 states and 96631 transitions. [2021-06-05 22:57:54,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:57:54,502 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:54,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:54,559 INFO L225 Difference]: With dead ends: 26987 [2021-06-05 22:57:54,559 INFO L226 Difference]: Without dead ends: 26963 [2021-06-05 22:57:54,559 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:57:54,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26963 states. [2021-06-05 22:57:54,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26963 to 26267. [2021-06-05 22:57:54,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26267 states, 26266 states have (on average 3.5969694662301075) internal successors, (94478), 26266 states have internal predecessors, (94478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:54,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26267 states to 26267 states and 94478 transitions. [2021-06-05 22:57:54,990 INFO L78 Accepts]: Start accepts. Automaton has 26267 states and 94478 transitions. Word has length 23 [2021-06-05 22:57:54,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:54,990 INFO L482 AbstractCegarLoop]: Abstraction has 26267 states and 94478 transitions. [2021-06-05 22:57:54,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:54,990 INFO L276 IsEmpty]: Start isEmpty. Operand 26267 states and 94478 transitions. [2021-06-05 22:57:55,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:55,015 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:55,016 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:55,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-05 22:57:55,216 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:55,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:55,217 INFO L82 PathProgramCache]: Analyzing trace with hash 710252467, now seen corresponding path program 19 times [2021-06-05 22:57:55,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:55,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865037115] [2021-06-05 22:57:55,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:55,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:55,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:55,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865037115] [2021-06-05 22:57:55,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865037115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:55,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946801655] [2021-06-05 22:57:55,253 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 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 [2021-06-05 22:57:55,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:55,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:57:55,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:55,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946801655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:55,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:55,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:57:55,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549178186] [2021-06-05 22:57:55,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:57:55,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:55,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:57:55,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:57:55,360 INFO L87 Difference]: Start difference. First operand 26267 states and 94478 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:55,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:55,668 INFO L93 Difference]: Finished difference Result 26543 states and 95133 transitions. [2021-06-05 22:57:55,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:57:55,668 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:55,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:55,726 INFO L225 Difference]: With dead ends: 26543 [2021-06-05 22:57:55,726 INFO L226 Difference]: Without dead ends: 26533 [2021-06-05 22:57:55,727 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:57:55,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26533 states. [2021-06-05 22:57:56,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26533 to 26261. [2021-06-05 22:57:56,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26261 states, 26260 states have (on average 3.596839299314547) internal successors, (94453), 26260 states have internal predecessors, (94453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:56,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26261 states to 26261 states and 94453 transitions. [2021-06-05 22:57:56,250 INFO L78 Accepts]: Start accepts. Automaton has 26261 states and 94453 transitions. Word has length 23 [2021-06-05 22:57:56,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:56,250 INFO L482 AbstractCegarLoop]: Abstraction has 26261 states and 94453 transitions. [2021-06-05 22:57:56,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:56,251 INFO L276 IsEmpty]: Start isEmpty. Operand 26261 states and 94453 transitions. [2021-06-05 22:57:56,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:56,277 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:56,277 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:56,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:56,478 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:56,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:56,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1071393779, now seen corresponding path program 20 times [2021-06-05 22:57:56,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:56,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907410742] [2021-06-05 22:57:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:56,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:56,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:56,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907410742] [2021-06-05 22:57:56,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907410742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:56,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144145407] [2021-06-05 22:57:56,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 22:57:56,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:57:56,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:56,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:57:56,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:56,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:56,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144145407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:56,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:56,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:57:56,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370957352] [2021-06-05 22:57:56,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:57:56,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:56,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:57:56,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:57:56,604 INFO L87 Difference]: Start difference. First operand 26261 states and 94453 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:56,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:56,885 INFO L93 Difference]: Finished difference Result 26792 states and 96145 transitions. [2021-06-05 22:57:56,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:57:56,886 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:56,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:56,962 INFO L225 Difference]: With dead ends: 26792 [2021-06-05 22:57:56,962 INFO L226 Difference]: Without dead ends: 26792 [2021-06-05 22:57:56,962 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:57:56,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26792 states. [2021-06-05 22:57:57,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26792 to 26250. [2021-06-05 22:57:57,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26250 states, 26249 states have (on average 3.595908415558688) internal successors, (94389), 26249 states have internal predecessors, (94389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:57,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26250 states to 26250 states and 94389 transitions. [2021-06-05 22:57:57,464 INFO L78 Accepts]: Start accepts. Automaton has 26250 states and 94389 transitions. Word has length 23 [2021-06-05 22:57:57,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:57,464 INFO L482 AbstractCegarLoop]: Abstraction has 26250 states and 94389 transitions. [2021-06-05 22:57:57,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:57,464 INFO L276 IsEmpty]: Start isEmpty. Operand 26250 states and 94389 transitions. [2021-06-05 22:57:57,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:57,490 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:57,490 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:57,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 22:57:57,690 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:57,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:57,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1604402439, now seen corresponding path program 25 times [2021-06-05 22:57:57,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:57,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885733474] [2021-06-05 22:57:57,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:57,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:57,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885733474] [2021-06-05 22:57:57,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885733474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:57,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158591832] [2021-06-05 22:57:57,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:57,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:57:57,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:57,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158591832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:57,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:57,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 22:57:57,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948738196] [2021-06-05 22:57:57,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:57:57,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:57,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:57:57,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:57:57,880 INFO L87 Difference]: Start difference. First operand 26250 states and 94389 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:58,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:58,185 INFO L93 Difference]: Finished difference Result 26475 states and 94952 transitions. [2021-06-05 22:57:58,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:57:58,186 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:58,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:58,248 INFO L225 Difference]: With dead ends: 26475 [2021-06-05 22:57:58,248 INFO L226 Difference]: Without dead ends: 26404 [2021-06-05 22:57:58,248 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:57:58,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26404 states. [2021-06-05 22:57:58,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26404 to 26284. [2021-06-05 22:57:58,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26284 states, 26283 states have (on average 3.595099493969486) internal successors, (94490), 26283 states have internal predecessors, (94490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:58,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26284 states to 26284 states and 94490 transitions. [2021-06-05 22:57:58,676 INFO L78 Accepts]: Start accepts. Automaton has 26284 states and 94490 transitions. Word has length 23 [2021-06-05 22:57:58,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:58,676 INFO L482 AbstractCegarLoop]: Abstraction has 26284 states and 94490 transitions. [2021-06-05 22:57:58,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:58,676 INFO L276 IsEmpty]: Start isEmpty. Operand 26284 states and 94490 transitions. [2021-06-05 22:57:58,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:57:58,700 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:58,700 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:58,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:58,901 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:58,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:58,901 INFO L82 PathProgramCache]: Analyzing trace with hash 805362435, now seen corresponding path program 26 times [2021-06-05 22:57:58,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:58,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272955370] [2021-06-05 22:57:58,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:58,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:58,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:58,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272955370] [2021-06-05 22:57:58,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272955370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:58,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776973515] [2021-06-05 22:57:58,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:58,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:57:58,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:58,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:57:58,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:59,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776973515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:59,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:59,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 22:57:59,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741411985] [2021-06-05 22:57:59,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:57:59,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:59,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:57:59,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:57:59,074 INFO L87 Difference]: Start difference. First operand 26284 states and 94490 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:59,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:59,347 INFO L93 Difference]: Finished difference Result 33195 states and 119238 transitions. [2021-06-05 22:57:59,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:57:59,348 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:57:59,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:59,417 INFO L225 Difference]: With dead ends: 33195 [2021-06-05 22:57:59,418 INFO L226 Difference]: Without dead ends: 33149 [2021-06-05 22:57:59,418 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 124.1ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:57:59,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33149 states. [2021-06-05 22:57:59,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33149 to 26274. [2021-06-05 22:57:59,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26274 states, 26273 states have (on average 3.5954782476306475) internal successors, (94464), 26273 states have internal predecessors, (94464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:00,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26274 states to 26274 states and 94464 transitions. [2021-06-05 22:58:00,058 INFO L78 Accepts]: Start accepts. Automaton has 26274 states and 94464 transitions. Word has length 23 [2021-06-05 22:58:00,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:00,058 INFO L482 AbstractCegarLoop]: Abstraction has 26274 states and 94464 transitions. [2021-06-05 22:58:00,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:00,058 INFO L276 IsEmpty]: Start isEmpty. Operand 26274 states and 94464 transitions. [2021-06-05 22:58:00,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:58:00,082 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:00,082 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:00,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 22:58:00,283 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:00,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:00,283 INFO L82 PathProgramCache]: Analyzing trace with hash 723963379, now seen corresponding path program 27 times [2021-06-05 22:58:00,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:00,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310970022] [2021-06-05 22:58:00,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:00,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:00,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:00,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310970022] [2021-06-05 22:58:00,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310970022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:00,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182614506] [2021-06-05 22:58:00,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:00,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:58:00,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:00,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:58:00,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:00,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:00,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182614506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:00,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:00,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:58:00,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56356794] [2021-06-05 22:58:00,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:58:00,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:00,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:58:00,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:58:00,515 INFO L87 Difference]: Start difference. First operand 26274 states and 94464 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:01,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:01,302 INFO L93 Difference]: Finished difference Result 33827 states and 120954 transitions. [2021-06-05 22:58:01,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:58:01,303 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:58:01,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:01,375 INFO L225 Difference]: With dead ends: 33827 [2021-06-05 22:58:01,375 INFO L226 Difference]: Without dead ends: 33589 [2021-06-05 22:58:01,375 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 479.4ms TimeCoverageRelationStatistics Valid=257, Invalid=613, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:58:01,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33589 states. [2021-06-05 22:58:01,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33589 to 26278. [2021-06-05 22:58:01,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26278 states, 26277 states have (on average 3.59557788179777) internal successors, (94481), 26277 states have internal predecessors, (94481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:01,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26278 states to 26278 states and 94481 transitions. [2021-06-05 22:58:01,945 INFO L78 Accepts]: Start accepts. Automaton has 26278 states and 94481 transitions. Word has length 23 [2021-06-05 22:58:01,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:01,945 INFO L482 AbstractCegarLoop]: Abstraction has 26278 states and 94481 transitions. [2021-06-05 22:58:01,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:01,945 INFO L276 IsEmpty]: Start isEmpty. Operand 26278 states and 94481 transitions. [2021-06-05 22:58:01,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:58:01,970 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:01,970 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:02,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:02,171 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:02,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:02,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1201212733, now seen corresponding path program 28 times [2021-06-05 22:58:02,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:02,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625410252] [2021-06-05 22:58:02,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:02,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:02,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:02,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625410252] [2021-06-05 22:58:02,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625410252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:02,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929390959] [2021-06-05 22:58:02,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 22:58:02,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:58:02,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:02,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:58:02,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:02,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:02,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929390959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:02,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:02,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 22:58:02,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526252821] [2021-06-05 22:58:02,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:58:02,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:02,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:58:02,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:58:02,354 INFO L87 Difference]: Start difference. First operand 26278 states and 94481 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-06-05 22:58:02,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:02,654 INFO L93 Difference]: Finished difference Result 26465 states and 94972 transitions. [2021-06-05 22:58:02,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:58:02,654 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 23 [2021-06-05 22:58:02,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:02,709 INFO L225 Difference]: With dead ends: 26465 [2021-06-05 22:58:02,709 INFO L226 Difference]: Without dead ends: 26406 [2021-06-05 22:58:02,710 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:58:02,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26406 states. [2021-06-05 22:58:03,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26406 to 26302. [2021-06-05 22:58:03,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26302 states, 26301 states have (on average 3.595262537546101) internal successors, (94559), 26301 states have internal predecessors, (94559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:03,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26302 states to 26302 states and 94559 transitions. [2021-06-05 22:58:03,154 INFO L78 Accepts]: Start accepts. Automaton has 26302 states and 94559 transitions. Word has length 23 [2021-06-05 22:58:03,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:03,154 INFO L482 AbstractCegarLoop]: Abstraction has 26302 states and 94559 transitions. [2021-06-05 22:58:03,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-06-05 22:58:03,154 INFO L276 IsEmpty]: Start isEmpty. Operand 26302 states and 94559 transitions. [2021-06-05 22:58:03,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:58:03,178 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:03,178 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:03,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:03,379 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:03,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:03,379 INFO L82 PathProgramCache]: Analyzing trace with hash -2000252737, now seen corresponding path program 29 times [2021-06-05 22:58:03,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:03,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772877054] [2021-06-05 22:58:03,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:03,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:03,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772877054] [2021-06-05 22:58:03,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772877054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:03,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470312657] [2021-06-05 22:58:03,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:03,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:58:03,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:03,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:58:03,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:03,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:03,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470312657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:03,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:03,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 22:58:03,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902635786] [2021-06-05 22:58:03,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:58:03,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:03,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:58:03,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:58:03,603 INFO L87 Difference]: Start difference. First operand 26302 states and 94559 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:03,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:03,943 INFO L93 Difference]: Finished difference Result 33157 states and 119124 transitions. [2021-06-05 22:58:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:58:03,944 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:58:03,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:04,010 INFO L225 Difference]: With dead ends: 33157 [2021-06-05 22:58:04,010 INFO L226 Difference]: Without dead ends: 33111 [2021-06-05 22:58:04,010 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 175.0ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:58:04,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33111 states. [2021-06-05 22:58:04,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33111 to 26299. [2021-06-05 22:58:04,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26299 states, 26298 states have (on average 3.595520571906609) internal successors, (94555), 26298 states have internal predecessors, (94555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:04,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26299 states to 26299 states and 94555 transitions. [2021-06-05 22:58:04,483 INFO L78 Accepts]: Start accepts. Automaton has 26299 states and 94555 transitions. Word has length 23 [2021-06-05 22:58:04,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:04,484 INFO L482 AbstractCegarLoop]: Abstraction has 26299 states and 94555 transitions. [2021-06-05 22:58:04,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:04,484 INFO L276 IsEmpty]: Start isEmpty. Operand 26299 states and 94555 transitions. [2021-06-05 22:58:04,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:58:04,509 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:04,509 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:04,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-05 22:58:04,710 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:04,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:04,710 INFO L82 PathProgramCache]: Analyzing trace with hash 2034590693, now seen corresponding path program 30 times [2021-06-05 22:58:04,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:04,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341724983] [2021-06-05 22:58:04,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:04,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:04,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:04,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341724983] [2021-06-05 22:58:04,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341724983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:04,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996652924] [2021-06-05 22:58:04,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:04,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:58:04,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:04,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:58:04,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:04,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:04,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996652924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:04,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:04,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 22:58:04,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166342744] [2021-06-05 22:58:04,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:58:04,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:04,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:58:04,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:58:04,890 INFO L87 Difference]: Start difference. First operand 26299 states and 94555 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-06-05 22:58:05,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:05,096 INFO L93 Difference]: Finished difference Result 26430 states and 94880 transitions. [2021-06-05 22:58:05,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:58:05,097 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 23 [2021-06-05 22:58:05,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:05,150 INFO L225 Difference]: With dead ends: 26430 [2021-06-05 22:58:05,150 INFO L226 Difference]: Without dead ends: 26387 [2021-06-05 22:58:05,151 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:58:05,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26387 states. [2021-06-05 22:58:05,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26387 to 26303. [2021-06-05 22:58:05,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26303 states, 26302 states have (on average 3.595201885788153) internal successors, (94561), 26302 states have internal predecessors, (94561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:05,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26303 states to 26303 states and 94561 transitions. [2021-06-05 22:58:05,691 INFO L78 Accepts]: Start accepts. Automaton has 26303 states and 94561 transitions. Word has length 23 [2021-06-05 22:58:05,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:05,692 INFO L482 AbstractCegarLoop]: Abstraction has 26303 states and 94561 transitions. [2021-06-05 22:58:05,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-06-05 22:58:05,692 INFO L276 IsEmpty]: Start isEmpty. Operand 26303 states and 94561 transitions. [2021-06-05 22:58:05,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:58:05,717 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:05,717 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:05,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 22:58:05,917 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:05,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:05,918 INFO L82 PathProgramCache]: Analyzing trace with hash 2056346547, now seen corresponding path program 31 times [2021-06-05 22:58:05,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:05,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273153962] [2021-06-05 22:58:05,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:05,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:05,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:05,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273153962] [2021-06-05 22:58:05,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273153962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:05,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327797792] [2021-06-05 22:58:05,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 22:58:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:06,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:58:06,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:06,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:06,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327797792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:06,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:06,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:58:06,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804163128] [2021-06-05 22:58:06,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:58:06,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:06,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:58:06,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:58:06,068 INFO L87 Difference]: Start difference. First operand 26303 states and 94561 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) [2021-06-05 22:58:06,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:06,386 INFO L93 Difference]: Finished difference Result 27397 states and 97838 transitions. [2021-06-05 22:58:06,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:58:06,386 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 23 [2021-06-05 22:58:06,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:06,465 INFO L225 Difference]: With dead ends: 27397 [2021-06-05 22:58:06,465 INFO L226 Difference]: Without dead ends: 27397 [2021-06-05 22:58:06,465 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:58:06,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27397 states. [2021-06-05 22:58:06,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27397 to 26148. [2021-06-05 22:58:06,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26148 states, 26147 states have (on average 3.595861857956936) internal successors, (94021), 26147 states have internal predecessors, (94021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:06,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26148 states to 26148 states and 94021 transitions. [2021-06-05 22:58:06,901 INFO L78 Accepts]: Start accepts. Automaton has 26148 states and 94021 transitions. Word has length 23 [2021-06-05 22:58:06,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:06,901 INFO L482 AbstractCegarLoop]: Abstraction has 26148 states and 94021 transitions. [2021-06-05 22:58:06,901 INFO L483 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) [2021-06-05 22:58:06,901 INFO L276 IsEmpty]: Start isEmpty. Operand 26148 states and 94021 transitions. [2021-06-05 22:58:06,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:58:06,927 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:06,927 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:07,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:07,127 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:07,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:07,128 INFO L82 PathProgramCache]: Analyzing trace with hash 472108223, now seen corresponding path program 32 times [2021-06-05 22:58:07,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:07,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436203336] [2021-06-05 22:58:07,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:07,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:07,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436203336] [2021-06-05 22:58:07,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436203336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:07,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337023959] [2021-06-05 22:58:07,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:07,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:58:07,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:07,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:58:07,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:07,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337023959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:07,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:07,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 22:58:07,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980697997] [2021-06-05 22:58:07,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:58:07,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:07,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:58:07,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:58:07,273 INFO L87 Difference]: Start difference. First operand 26148 states and 94021 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:07,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:07,746 INFO L93 Difference]: Finished difference Result 42723 states and 155237 transitions. [2021-06-05 22:58:07,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:58:07,746 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:58:07,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:07,842 INFO L225 Difference]: With dead ends: 42723 [2021-06-05 22:58:07,842 INFO L226 Difference]: Without dead ends: 42723 [2021-06-05 22:58:07,842 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 183.9ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:58:07,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42723 states. [2021-06-05 22:58:08,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42723 to 21505. [2021-06-05 22:58:08,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21505 states, 21504 states have (on average 3.5904482886904763) internal successors, (77209), 21504 states have internal predecessors, (77209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:08,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21505 states to 21505 states and 77209 transitions. [2021-06-05 22:58:08,356 INFO L78 Accepts]: Start accepts. Automaton has 21505 states and 77209 transitions. Word has length 23 [2021-06-05 22:58:08,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:08,356 INFO L482 AbstractCegarLoop]: Abstraction has 21505 states and 77209 transitions. [2021-06-05 22:58:08,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:08,356 INFO L276 IsEmpty]: Start isEmpty. Operand 21505 states and 77209 transitions. [2021-06-05 22:58:08,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:58:08,379 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:08,379 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:08,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 22:58:08,579 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:08,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:08,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1491839683, now seen corresponding path program 33 times [2021-06-05 22:58:08,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:08,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463372163] [2021-06-05 22:58:08,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:08,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:08,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463372163] [2021-06-05 22:58:08,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463372163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:08,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998772585] [2021-06-05 22:58:08,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:08,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:58:08,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:08,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:58:08,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:08,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998772585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:08,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:08,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 22:58:08,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471284367] [2021-06-05 22:58:08,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:58:08,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:08,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:58:08,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:58:08,735 INFO L87 Difference]: Start difference. First operand 21505 states and 77209 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-06-05 22:58:09,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:09,117 INFO L93 Difference]: Finished difference Result 32944 states and 119221 transitions. [2021-06-05 22:58:09,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:58:09,117 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 23 [2021-06-05 22:58:09,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:09,193 INFO L225 Difference]: With dead ends: 32944 [2021-06-05 22:58:09,193 INFO L226 Difference]: Without dead ends: 32944 [2021-06-05 22:58:09,193 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 178.3ms TimeCoverageRelationStatistics Valid=151, Invalid=269, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:58:09,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32944 states. [2021-06-05 22:58:09,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32944 to 25922. [2021-06-05 22:58:09,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25922 states, 25921 states have (on average 3.586397129740365) internal successors, (92963), 25921 states have internal predecessors, (92963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:09,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25922 states to 25922 states and 92963 transitions. [2021-06-05 22:58:09,681 INFO L78 Accepts]: Start accepts. Automaton has 25922 states and 92963 transitions. Word has length 23 [2021-06-05 22:58:09,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:09,681 INFO L482 AbstractCegarLoop]: Abstraction has 25922 states and 92963 transitions. [2021-06-05 22:58:09,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-06-05 22:58:09,682 INFO L276 IsEmpty]: Start isEmpty. Operand 25922 states and 92963 transitions. [2021-06-05 22:58:09,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:58:09,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:09,709 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:09,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:09,921 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:09,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:09,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1489861369, now seen corresponding path program 34 times [2021-06-05 22:58:09,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:09,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783887932] [2021-06-05 22:58:09,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:09,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:09,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783887932] [2021-06-05 22:58:09,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783887932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:09,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856293539] [2021-06-05 22:58:09,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:10,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:58:10,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:10,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:58:10,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:10,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:10,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856293539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:10,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:10,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 22:58:10,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177619505] [2021-06-05 22:58:10,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:58:10,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:10,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:58:10,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:58:10,089 INFO L87 Difference]: Start difference. First operand 25922 states and 92963 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-06-05 22:58:10,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:10,309 INFO L93 Difference]: Finished difference Result 26059 states and 93304 transitions. [2021-06-05 22:58:10,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:58:10,310 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 23 [2021-06-05 22:58:10,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:10,362 INFO L225 Difference]: With dead ends: 26059 [2021-06-05 22:58:10,362 INFO L226 Difference]: Without dead ends: 26010 [2021-06-05 22:58:10,362 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:58:10,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26010 states. [2021-06-05 22:58:10,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26010 to 25935. [2021-06-05 22:58:10,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25935 states, 25934 states have (on average 3.5862188632682965) internal successors, (93005), 25934 states have internal predecessors, (93005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:10,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25935 states to 25935 states and 93005 transitions. [2021-06-05 22:58:10,917 INFO L78 Accepts]: Start accepts. Automaton has 25935 states and 93005 transitions. Word has length 23 [2021-06-05 22:58:10,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:10,917 INFO L482 AbstractCegarLoop]: Abstraction has 25935 states and 93005 transitions. [2021-06-05 22:58:10,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-06-05 22:58:10,917 INFO L276 IsEmpty]: Start isEmpty. Operand 25935 states and 93005 transitions. [2021-06-05 22:58:10,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:58:10,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:10,942 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:11,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 22:58:11,143 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:11,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:11,143 INFO L82 PathProgramCache]: Analyzing trace with hash 2006065923, now seen corresponding path program 35 times [2021-06-05 22:58:11,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:11,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137843254] [2021-06-05 22:58:11,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:11,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:11,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137843254] [2021-06-05 22:58:11,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137843254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:11,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044683493] [2021-06-05 22:58:11,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:11,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:58:11,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:11,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:58:11,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:11,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044683493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:11,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:11,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 22:58:11,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532714378] [2021-06-05 22:58:11,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:58:11,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:11,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:58:11,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:58:11,336 INFO L87 Difference]: Start difference. First operand 25935 states and 93005 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:11,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:11,835 INFO L93 Difference]: Finished difference Result 32792 states and 117496 transitions. [2021-06-05 22:58:11,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:58:11,836 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:58:11,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:11,908 INFO L225 Difference]: With dead ends: 32792 [2021-06-05 22:58:11,908 INFO L226 Difference]: Without dead ends: 32673 [2021-06-05 22:58:11,909 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 294.4ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:58:11,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32673 states. [2021-06-05 22:58:12,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32673 to 25932. [2021-06-05 22:58:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25932 states, 25931 states have (on average 3.586363811654005) internal successors, (92998), 25931 states have internal predecessors, (92998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:12,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25932 states to 25932 states and 92998 transitions. [2021-06-05 22:58:12,484 INFO L78 Accepts]: Start accepts. Automaton has 25932 states and 92998 transitions. Word has length 23 [2021-06-05 22:58:12,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:12,485 INFO L482 AbstractCegarLoop]: Abstraction has 25932 states and 92998 transitions. [2021-06-05 22:58:12,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:12,485 INFO L276 IsEmpty]: Start isEmpty. Operand 25932 states and 92998 transitions. [2021-06-05 22:58:12,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:58:12,511 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:12,511 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:12,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:12,713 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:12,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:12,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1745942057, now seen corresponding path program 36 times [2021-06-05 22:58:12,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:12,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912231420] [2021-06-05 22:58:12,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:12,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:12,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:12,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912231420] [2021-06-05 22:58:12,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912231420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:12,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943294560] [2021-06-05 22:58:12,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:12,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:58:12,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:12,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:58:12,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:12,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943294560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:12,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:12,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 22:58:12,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347156868] [2021-06-05 22:58:12,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:58:12,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:12,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:58:12,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:58:12,899 INFO L87 Difference]: Start difference. First operand 25932 states and 92998 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-06-05 22:58:13,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:13,115 INFO L93 Difference]: Finished difference Result 26059 states and 93301 transitions. [2021-06-05 22:58:13,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:58:13,116 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 23 [2021-06-05 22:58:13,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:13,167 INFO L225 Difference]: With dead ends: 26059 [2021-06-05 22:58:13,167 INFO L226 Difference]: Without dead ends: 26016 [2021-06-05 22:58:13,168 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:58:13,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26016 states. [2021-06-05 22:58:13,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26016 to 25932. [2021-06-05 22:58:13,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25932 states, 25931 states have (on average 3.586363811654005) internal successors, (92998), 25931 states have internal predecessors, (92998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:13,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25932 states to 25932 states and 92998 transitions. [2021-06-05 22:58:13,827 INFO L78 Accepts]: Start accepts. Automaton has 25932 states and 92998 transitions. Word has length 23 [2021-06-05 22:58:13,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:13,828 INFO L482 AbstractCegarLoop]: Abstraction has 25932 states and 92998 transitions. [2021-06-05 22:58:13,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-06-05 22:58:13,828 INFO L276 IsEmpty]: Start isEmpty. Operand 25932 states and 92998 transitions. [2021-06-05 22:58:13,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:58:13,854 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:13,854 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:14,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 22:58:14,055 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:14,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:14,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1767697911, now seen corresponding path program 37 times [2021-06-05 22:58:14,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:14,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421257193] [2021-06-05 22:58:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:14,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:14,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421257193] [2021-06-05 22:58:14,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421257193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:14,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081113013] [2021-06-05 22:58:14,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 22:58:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:14,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:58:14,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:14,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081113013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:14,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:14,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:58:14,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26917249] [2021-06-05 22:58:14,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:58:14,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:14,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:58:14,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:58:14,227 INFO L87 Difference]: Start difference. First operand 25932 states and 92998 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) [2021-06-05 22:58:14,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:14,620 INFO L93 Difference]: Finished difference Result 27582 states and 98159 transitions. [2021-06-05 22:58:14,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:58:14,620 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 23 [2021-06-05 22:58:14,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:14,693 INFO L225 Difference]: With dead ends: 27582 [2021-06-05 22:58:14,693 INFO L226 Difference]: Without dead ends: 27582 [2021-06-05 22:58:14,693 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:58:14,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27582 states. [2021-06-05 22:58:15,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27582 to 26354. [2021-06-05 22:58:15,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26354 states, 26353 states have (on average 3.585436193222783) internal successors, (94487), 26353 states have internal predecessors, (94487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26354 states to 26354 states and 94487 transitions. [2021-06-05 22:58:15,364 INFO L78 Accepts]: Start accepts. Automaton has 26354 states and 94487 transitions. Word has length 23 [2021-06-05 22:58:15,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:15,364 INFO L482 AbstractCegarLoop]: Abstraction has 26354 states and 94487 transitions. [2021-06-05 22:58:15,364 INFO L483 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) [2021-06-05 22:58:15,365 INFO L276 IsEmpty]: Start isEmpty. Operand 26354 states and 94487 transitions. [2021-06-05 22:58:15,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:58:15,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:15,391 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:15,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:15,591 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:15,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:15,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1625128567, now seen corresponding path program 38 times [2021-06-05 22:58:15,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:15,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230225440] [2021-06-05 22:58:15,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:15,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:15,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230225440] [2021-06-05 22:58:15,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230225440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:15,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358358967] [2021-06-05 22:58:15,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:15,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:58:15,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:15,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:58:15,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:15,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358358967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:15,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:15,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 22:58:15,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201535596] [2021-06-05 22:58:15,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:58:15,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:15,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:58:15,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:58:15,880 INFO L87 Difference]: Start difference. First operand 26354 states and 94487 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-06-05 22:58:16,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:16,213 INFO L93 Difference]: Finished difference Result 35465 states and 126867 transitions. [2021-06-05 22:58:16,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:58:16,214 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 23 [2021-06-05 22:58:16,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:16,288 INFO L225 Difference]: With dead ends: 35465 [2021-06-05 22:58:16,288 INFO L226 Difference]: Without dead ends: 35465 [2021-06-05 22:58:16,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 155.4ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:58:16,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35465 states. [2021-06-05 22:58:16,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35465 to 25981. [2021-06-05 22:58:16,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25981 states, 25980 states have (on average 3.5869515011547346) internal successors, (93189), 25980 states have internal predecessors, (93189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:17,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25981 states to 25981 states and 93189 transitions. [2021-06-05 22:58:17,004 INFO L78 Accepts]: Start accepts. Automaton has 25981 states and 93189 transitions. Word has length 23 [2021-06-05 22:58:17,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:17,005 INFO L482 AbstractCegarLoop]: Abstraction has 25981 states and 93189 transitions. [2021-06-05 22:58:17,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-06-05 22:58:17,005 INFO L276 IsEmpty]: Start isEmpty. Operand 25981 states and 93189 transitions. [2021-06-05 22:58:17,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:58:17,031 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:17,031 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:17,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 22:58:17,232 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:17,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:17,232 INFO L82 PathProgramCache]: Analyzing trace with hash 685163967, now seen corresponding path program 39 times [2021-06-05 22:58:17,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:17,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944739529] [2021-06-05 22:58:17,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:17,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:17,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944739529] [2021-06-05 22:58:17,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944739529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:17,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573615442] [2021-06-05 22:58:17,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:17,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:58:17,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:17,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:58:17,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:17,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573615442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:17,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:17,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 22:58:17,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097817359] [2021-06-05 22:58:17,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:58:17,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:17,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:58:17,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:58:17,411 INFO L87 Difference]: Start difference. First operand 25981 states and 93189 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-06-05 22:58:17,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:17,657 INFO L93 Difference]: Finished difference Result 26050 states and 93338 transitions. [2021-06-05 22:58:17,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:58:17,658 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 23 [2021-06-05 22:58:17,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:17,709 INFO L225 Difference]: With dead ends: 26050 [2021-06-05 22:58:17,709 INFO L226 Difference]: Without dead ends: 26007 [2021-06-05 22:58:17,709 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:58:17,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26007 states. [2021-06-05 22:58:18,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26007 to 25986. [2021-06-05 22:58:18,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25986 states, 25985 states have (on average 3.586800076967481) internal successors, (93203), 25985 states have internal predecessors, (93203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:18,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25986 states to 25986 states and 93203 transitions. [2021-06-05 22:58:18,384 INFO L78 Accepts]: Start accepts. Automaton has 25986 states and 93203 transitions. Word has length 23 [2021-06-05 22:58:18,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:18,384 INFO L482 AbstractCegarLoop]: Abstraction has 25986 states and 93203 transitions. [2021-06-05 22:58:18,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-06-05 22:58:18,385 INFO L276 IsEmpty]: Start isEmpty. Operand 25986 states and 93203 transitions. [2021-06-05 22:58:18,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:58:18,411 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:18,411 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:18,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:18,611 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:18,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:18,612 INFO L82 PathProgramCache]: Analyzing trace with hash 706919821, now seen corresponding path program 40 times [2021-06-05 22:58:18,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:18,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664818018] [2021-06-05 22:58:18,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:18,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:18,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664818018] [2021-06-05 22:58:18,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664818018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:18,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787031300] [2021-06-05 22:58:18,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:18,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:58:18,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:18,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:58:18,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:18,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:18,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787031300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:18,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:18,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:58:18,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685206099] [2021-06-05 22:58:18,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:58:18,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:18,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:58:18,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:58:18,737 INFO L87 Difference]: Start difference. First operand 25986 states and 93203 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) [2021-06-05 22:58:18,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:18,993 INFO L93 Difference]: Finished difference Result 29926 states and 106677 transitions. [2021-06-05 22:58:18,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:58:18,993 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 23 [2021-06-05 22:58:18,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:19,054 INFO L225 Difference]: With dead ends: 29926 [2021-06-05 22:58:19,054 INFO L226 Difference]: Without dead ends: 29926 [2021-06-05 22:58:19,054 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:58:19,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29926 states. [2021-06-05 22:58:19,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29926 to 28815. [2021-06-05 22:58:19,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28815 states, 28814 states have (on average 3.58617338793642) internal successors, (103332), 28814 states have internal predecessors, (103332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:19,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28815 states to 28815 states and 103332 transitions. [2021-06-05 22:58:19,859 INFO L78 Accepts]: Start accepts. Automaton has 28815 states and 103332 transitions. Word has length 23 [2021-06-05 22:58:19,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:19,859 INFO L482 AbstractCegarLoop]: Abstraction has 28815 states and 103332 transitions. [2021-06-05 22:58:19,859 INFO L483 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) [2021-06-05 22:58:19,859 INFO L276 IsEmpty]: Start isEmpty. Operand 28815 states and 103332 transitions. [2021-06-05 22:58:19,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:58:19,904 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:19,904 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:20,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:20,121 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:20,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:20,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1807581121, now seen corresponding path program 41 times [2021-06-05 22:58:20,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:20,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667452865] [2021-06-05 22:58:20,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:20,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:20,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667452865] [2021-06-05 22:58:20,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667452865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:20,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908256943] [2021-06-05 22:58:20,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:20,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:58:20,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:20,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:58:20,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:20,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908256943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:20,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:20,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 22:58:20,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953030333] [2021-06-05 22:58:20,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:58:20,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:20,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:58:20,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:58:20,217 INFO L87 Difference]: Start difference. First operand 28815 states and 103332 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-06-05 22:58:20,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:20,507 INFO L93 Difference]: Finished difference Result 29526 states and 105293 transitions. [2021-06-05 22:58:20,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:58:20,508 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 23 [2021-06-05 22:58:20,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:20,570 INFO L225 Difference]: With dead ends: 29526 [2021-06-05 22:58:20,570 INFO L226 Difference]: Without dead ends: 29526 [2021-06-05 22:58:20,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:58:20,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29526 states. [2021-06-05 22:58:21,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29526 to 28856. [2021-06-05 22:58:21,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28856 states, 28855 states have (on average 3.585617743891873) internal successors, (103463), 28855 states have internal predecessors, (103463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:21,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28856 states to 28856 states and 103463 transitions. [2021-06-05 22:58:21,290 INFO L78 Accepts]: Start accepts. Automaton has 28856 states and 103463 transitions. Word has length 23 [2021-06-05 22:58:21,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:21,290 INFO L482 AbstractCegarLoop]: Abstraction has 28856 states and 103463 transitions. [2021-06-05 22:58:21,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-06-05 22:58:21,290 INFO L276 IsEmpty]: Start isEmpty. Operand 28856 states and 103463 transitions. [2021-06-05 22:58:21,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:58:21,317 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:21,317 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:21,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 22:58:21,517 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:21,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:21,520 INFO L82 PathProgramCache]: Analyzing trace with hash 817141951, now seen corresponding path program 16 times [2021-06-05 22:58:21,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:21,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644639254] [2021-06-05 22:58:21,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:21,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:58:21,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:21,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644639254] [2021-06-05 22:58:21,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644639254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:21,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18505437] [2021-06-05 22:58:21,587 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:21,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:58:21,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:21,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:58:21,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:21,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:58:21,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18505437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:21,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:21,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 22:58:21,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814386470] [2021-06-05 22:58:21,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:58:21,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:21,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:58:21,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:58:21,670 INFO L87 Difference]: Start difference. First operand 28856 states and 103463 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:21,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:21,863 INFO L93 Difference]: Finished difference Result 29072 states and 104061 transitions. [2021-06-05 22:58:21,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:58:21,864 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:58:21,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:21,948 INFO L225 Difference]: With dead ends: 29072 [2021-06-05 22:58:21,948 INFO L226 Difference]: Without dead ends: 29019 [2021-06-05 22:58:21,948 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:58:21,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29019 states. [2021-06-05 22:58:22,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29019 to 28851. [2021-06-05 22:58:22,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28851 states, 28850 states have (on average 3.5844367417677643) internal successors, (103411), 28850 states have internal predecessors, (103411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28851 states to 28851 states and 103411 transitions. [2021-06-05 22:58:22,596 INFO L78 Accepts]: Start accepts. Automaton has 28851 states and 103411 transitions. Word has length 23 [2021-06-05 22:58:22,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:22,596 INFO L482 AbstractCegarLoop]: Abstraction has 28851 states and 103411 transitions. [2021-06-05 22:58:22,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:22,596 INFO L276 IsEmpty]: Start isEmpty. Operand 28851 states and 103411 transitions. [2021-06-05 22:58:22,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:58:22,624 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:22,624 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:22,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 22:58:22,825 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:22,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:22,825 INFO L82 PathProgramCache]: Analyzing trace with hash 2049439803, now seen corresponding path program 42 times [2021-06-05 22:58:22,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:22,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691914203] [2021-06-05 22:58:22,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:22,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:22,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691914203] [2021-06-05 22:58:22,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691914203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:22,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52073017] [2021-06-05 22:58:22,865 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:23,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:58:23,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:23,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:58:23,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:23,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:23,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52073017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:23,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:23,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:58:23,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883031540] [2021-06-05 22:58:23,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:58:23,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:23,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:58:23,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:58:23,089 INFO L87 Difference]: Start difference. First operand 28851 states and 103411 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:23,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:23,358 INFO L93 Difference]: Finished difference Result 37800 states and 135115 transitions. [2021-06-05 22:58:23,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:58:23,358 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:58:23,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:23,436 INFO L225 Difference]: With dead ends: 37800 [2021-06-05 22:58:23,436 INFO L226 Difference]: Without dead ends: 37800 [2021-06-05 22:58:23,437 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:58:23,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37800 states. [2021-06-05 22:58:23,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37800 to 19949. [2021-06-05 22:58:23,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19949 states, 19948 states have (on average 3.5674754361339485) internal successors, (71164), 19948 states have internal predecessors, (71164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:23,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19949 states to 19949 states and 71164 transitions. [2021-06-05 22:58:23,971 INFO L78 Accepts]: Start accepts. Automaton has 19949 states and 71164 transitions. Word has length 23 [2021-06-05 22:58:23,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:23,972 INFO L482 AbstractCegarLoop]: Abstraction has 19949 states and 71164 transitions. [2021-06-05 22:58:23,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:23,972 INFO L276 IsEmpty]: Start isEmpty. Operand 19949 states and 71164 transitions. [2021-06-05 22:58:23,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:58:23,997 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:23,997 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:24,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:24,198 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:24,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:24,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1759723389, now seen corresponding path program 43 times [2021-06-05 22:58:24,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:24,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792870391] [2021-06-05 22:58:24,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:24,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:24,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792870391] [2021-06-05 22:58:24,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792870391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:24,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517038878] [2021-06-05 22:58:24,232 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:24,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:24,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:58:24,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:24,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517038878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:24,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:24,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:58:24,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367512345] [2021-06-05 22:58:24,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:58:24,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:24,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:58:24,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:58:24,306 INFO L87 Difference]: Start difference. First operand 19949 states and 71164 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:24,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:24,728 INFO L93 Difference]: Finished difference Result 28786 states and 101970 transitions. [2021-06-05 22:58:24,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:58:24,734 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:58:24,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:24,805 INFO L225 Difference]: With dead ends: 28786 [2021-06-05 22:58:24,806 INFO L226 Difference]: Without dead ends: 28786 [2021-06-05 22:58:24,806 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:58:24,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28786 states. [2021-06-05 22:58:25,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28786 to 27373. [2021-06-05 22:58:25,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27373 states, 27372 states have (on average 3.5752228554727457) internal successors, (97861), 27372 states have internal predecessors, (97861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27373 states to 27373 states and 97861 transitions. [2021-06-05 22:58:25,425 INFO L78 Accepts]: Start accepts. Automaton has 27373 states and 97861 transitions. Word has length 23 [2021-06-05 22:58:25,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:25,425 INFO L482 AbstractCegarLoop]: Abstraction has 27373 states and 97861 transitions. [2021-06-05 22:58:25,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:25,426 INFO L276 IsEmpty]: Start isEmpty. Operand 27373 states and 97861 transitions. [2021-06-05 22:58:25,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:58:25,454 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:25,454 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:25,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:25,655 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:25,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:25,655 INFO L82 PathProgramCache]: Analyzing trace with hash 208892275, now seen corresponding path program 17 times [2021-06-05 22:58:25,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:25,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288121384] [2021-06-05 22:58:25,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:25,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:58:25,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:25,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288121384] [2021-06-05 22:58:25,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288121384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:25,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44309867] [2021-06-05 22:58:25,695 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:25,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:58:25,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:25,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:58:25,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:58:25,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44309867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:25,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:25,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 22:58:25,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299983524] [2021-06-05 22:58:25,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:58:25,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:25,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:58:25,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:58:25,777 INFO L87 Difference]: Start difference. First operand 27373 states and 97861 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:25,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:25,953 INFO L93 Difference]: Finished difference Result 27858 states and 99275 transitions. [2021-06-05 22:58:25,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:58:25,954 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:58:25,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:26,018 INFO L225 Difference]: With dead ends: 27858 [2021-06-05 22:58:26,019 INFO L226 Difference]: Without dead ends: 27777 [2021-06-05 22:58:26,019 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:58:26,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27777 states. [2021-06-05 22:58:26,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27777 to 27398. [2021-06-05 22:58:26,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27398 states, 27397 states have (on average 3.575135963791656) internal successors, (97948), 27397 states have internal predecessors, (97948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:26,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27398 states to 27398 states and 97948 transitions. [2021-06-05 22:58:26,709 INFO L78 Accepts]: Start accepts. Automaton has 27398 states and 97948 transitions. Word has length 23 [2021-06-05 22:58:26,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:26,709 INFO L482 AbstractCegarLoop]: Abstraction has 27398 states and 97948 transitions. [2021-06-05 22:58:26,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand 27398 states and 97948 transitions. [2021-06-05 22:58:26,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:58:26,737 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:26,737 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:26,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:26,938 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:26,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:26,938 INFO L82 PathProgramCache]: Analyzing trace with hash 848779567, now seen corresponding path program 44 times [2021-06-05 22:58:26,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:26,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321856504] [2021-06-05 22:58:26,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:26,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:26,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321856504] [2021-06-05 22:58:26,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321856504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:26,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238475865] [2021-06-05 22:58:26,969 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:26,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:58:26,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:26,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:58:26,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:27,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238475865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:27,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:27,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:58:27,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445984809] [2021-06-05 22:58:27,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:58:27,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:27,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:58:27,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:58:27,048 INFO L87 Difference]: Start difference. First operand 27398 states and 97948 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:27,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:27,380 INFO L93 Difference]: Finished difference Result 38461 states and 138552 transitions. [2021-06-05 22:58:27,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:58:27,381 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:58:27,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:27,475 INFO L225 Difference]: With dead ends: 38461 [2021-06-05 22:58:27,475 INFO L226 Difference]: Without dead ends: 38461 [2021-06-05 22:58:27,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:58:27,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38461 states. [2021-06-05 22:58:28,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38461 to 24308. [2021-06-05 22:58:28,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24308 states, 24307 states have (on average 3.5794215658040893) internal successors, (87005), 24307 states have internal predecessors, (87005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:28,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24308 states to 24308 states and 87005 transitions. [2021-06-05 22:58:28,162 INFO L78 Accepts]: Start accepts. Automaton has 24308 states and 87005 transitions. Word has length 23 [2021-06-05 22:58:28,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:28,163 INFO L482 AbstractCegarLoop]: Abstraction has 24308 states and 87005 transitions. [2021-06-05 22:58:28,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:28,163 INFO L276 IsEmpty]: Start isEmpty. Operand 24308 states and 87005 transitions. [2021-06-05 22:58:28,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:58:28,191 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:28,191 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:28,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 22:58:28,391 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:28,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:28,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1907900651, now seen corresponding path program 18 times [2021-06-05 22:58:28,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:28,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730973632] [2021-06-05 22:58:28,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:58:28,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:28,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730973632] [2021-06-05 22:58:28,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730973632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:28,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170409690] [2021-06-05 22:58:28,449 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:28,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:58:28,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:28,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:58:28,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:58:28,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170409690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:28,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:28,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 22:58:28,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022967980] [2021-06-05 22:58:28,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:58:28,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:28,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:58:28,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:58:28,522 INFO L87 Difference]: Start difference. First operand 24308 states and 87005 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:28,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:28,697 INFO L93 Difference]: Finished difference Result 24924 states and 88837 transitions. [2021-06-05 22:58:28,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:58:28,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:58:28,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:28,948 INFO L225 Difference]: With dead ends: 24924 [2021-06-05 22:58:28,948 INFO L226 Difference]: Without dead ends: 24835 [2021-06-05 22:58:28,948 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:58:28,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24835 states. [2021-06-05 22:58:29,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24835 to 24301. [2021-06-05 22:58:29,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24301 states, 24300 states have (on average 3.579835390946502) internal successors, (86990), 24300 states have internal predecessors, (86990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:29,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24301 states to 24301 states and 86990 transitions. [2021-06-05 22:58:29,349 INFO L78 Accepts]: Start accepts. Automaton has 24301 states and 86990 transitions. Word has length 23 [2021-06-05 22:58:29,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:29,349 INFO L482 AbstractCegarLoop]: Abstraction has 24301 states and 86990 transitions. [2021-06-05 22:58:29,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:29,349 INFO L276 IsEmpty]: Start isEmpty. Operand 24301 states and 86990 transitions. [2021-06-05 22:58:29,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:58:29,377 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:29,377 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:29,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 22:58:29,577 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:29,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:29,578 INFO L82 PathProgramCache]: Analyzing trace with hash 2012461191, now seen corresponding path program 19 times [2021-06-05 22:58:29,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:29,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506601446] [2021-06-05 22:58:29,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:58:29,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:29,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506601446] [2021-06-05 22:58:29,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506601446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:29,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462140827] [2021-06-05 22:58:29,636 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:29,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:58:29,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:58:29,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462140827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:29,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:29,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 22:58:29,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985915495] [2021-06-05 22:58:29,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:58:29,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:29,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:58:29,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:58:29,731 INFO L87 Difference]: Start difference. First operand 24301 states and 86990 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:30,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:30,046 INFO L93 Difference]: Finished difference Result 24748 states and 88285 transitions. [2021-06-05 22:58:30,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:58:30,047 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:58:30,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:30,102 INFO L225 Difference]: With dead ends: 24748 [2021-06-05 22:58:30,103 INFO L226 Difference]: Without dead ends: 24675 [2021-06-05 22:58:30,103 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:58:30,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24675 states. [2021-06-05 22:58:30,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24675 to 24351. [2021-06-05 22:58:30,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24351 states, 24350 states have (on average 3.5791786447638603) internal successors, (87153), 24350 states have internal predecessors, (87153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:30,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24351 states to 24351 states and 87153 transitions. [2021-06-05 22:58:30,554 INFO L78 Accepts]: Start accepts. Automaton has 24351 states and 87153 transitions. Word has length 23 [2021-06-05 22:58:30,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:30,555 INFO L482 AbstractCegarLoop]: Abstraction has 24351 states and 87153 transitions. [2021-06-05 22:58:30,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:30,555 INFO L276 IsEmpty]: Start isEmpty. Operand 24351 states and 87153 transitions. [2021-06-05 22:58:30,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:58:30,584 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:30,584 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:30,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 22:58:30,784 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:30,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:30,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1545638063, now seen corresponding path program 20 times [2021-06-05 22:58:30,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:30,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205966437] [2021-06-05 22:58:30,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:30,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:30,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:58:30,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:30,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205966437] [2021-06-05 22:58:30,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205966437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:30,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626859968] [2021-06-05 22:58:30,830 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:30,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:58:30,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:30,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:58:30,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:30,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:58:30,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626859968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:30,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:30,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 22:58:30,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296839642] [2021-06-05 22:58:30,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:58:30,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:30,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:58:30,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:58:30,910 INFO L87 Difference]: Start difference. First operand 24351 states and 87153 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:31,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:31,186 INFO L93 Difference]: Finished difference Result 24905 states and 88675 transitions. [2021-06-05 22:58:31,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:58:31,188 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:58:31,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:31,236 INFO L225 Difference]: With dead ends: 24905 [2021-06-05 22:58:31,236 INFO L226 Difference]: Without dead ends: 24844 [2021-06-05 22:58:31,236 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:58:31,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24844 states. [2021-06-05 22:58:31,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24844 to 24401. [2021-06-05 22:58:31,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24401 states, 24400 states have (on average 3.5781147540983604) internal successors, (87306), 24400 states have internal predecessors, (87306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:31,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24401 states to 24401 states and 87306 transitions. [2021-06-05 22:58:31,575 INFO L78 Accepts]: Start accepts. Automaton has 24401 states and 87306 transitions. Word has length 23 [2021-06-05 22:58:31,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:31,575 INFO L482 AbstractCegarLoop]: Abstraction has 24401 states and 87306 transitions. [2021-06-05 22:58:31,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:31,575 INFO L276 IsEmpty]: Start isEmpty. Operand 24401 states and 87306 transitions. [2021-06-05 22:58:31,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:58:31,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:31,601 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:31,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 22:58:31,801 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:31,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:31,801 INFO L82 PathProgramCache]: Analyzing trace with hash 322190439, now seen corresponding path program 45 times [2021-06-05 22:58:31,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:31,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168406855] [2021-06-05 22:58:31,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:31,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:31,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:31,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168406855] [2021-06-05 22:58:31,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168406855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:31,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807543116] [2021-06-05 22:58:31,828 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:31,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:58:31,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:31,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:58:31,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:31,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807543116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:31,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:31,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:58:31,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783550623] [2021-06-05 22:58:31,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:58:31,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:31,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:58:31,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:58:31,910 INFO L87 Difference]: Start difference. First operand 24401 states and 87306 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-06-05 22:58:32,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:32,502 INFO L93 Difference]: Finished difference Result 66091 states and 236252 transitions. [2021-06-05 22:58:32,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:58:32,503 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 23 [2021-06-05 22:58:32,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:32,655 INFO L225 Difference]: With dead ends: 66091 [2021-06-05 22:58:32,656 INFO L226 Difference]: Without dead ends: 66077 [2021-06-05 22:58:32,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:58:32,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66077 states. [2021-06-05 22:58:33,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66077 to 64280. [2021-06-05 22:58:33,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64280 states, 64279 states have (on average 3.5925574448886883) internal successors, (230926), 64279 states have internal predecessors, (230926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:34,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64280 states to 64280 states and 230926 transitions. [2021-06-05 22:58:34,264 INFO L78 Accepts]: Start accepts. Automaton has 64280 states and 230926 transitions. Word has length 23 [2021-06-05 22:58:34,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:34,264 INFO L482 AbstractCegarLoop]: Abstraction has 64280 states and 230926 transitions. [2021-06-05 22:58:34,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-06-05 22:58:34,264 INFO L276 IsEmpty]: Start isEmpty. Operand 64280 states and 230926 transitions. [2021-06-05 22:58:34,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:58:34,339 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:34,340 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:34,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 22:58:34,540 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:34,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:34,541 INFO L82 PathProgramCache]: Analyzing trace with hash 749275825, now seen corresponding path program 21 times [2021-06-05 22:58:34,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:34,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636970093] [2021-06-05 22:58:34,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:34,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:34,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:34,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636970093] [2021-06-05 22:58:34,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636970093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:34,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855192981] [2021-06-05 22:58:34,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:34,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:58:34,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:34,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:58:34,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:34,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855192981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:34,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:34,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 22:58:34,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468172803] [2021-06-05 22:58:34,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:58:34,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:34,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:58:34,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:58:34,688 INFO L87 Difference]: Start difference. First operand 64280 states and 230926 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:35,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:35,056 INFO L93 Difference]: Finished difference Result 64761 states and 232372 transitions. [2021-06-05 22:58:35,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:58:35,056 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:58:35,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:35,231 INFO L225 Difference]: With dead ends: 64761 [2021-06-05 22:58:35,231 INFO L226 Difference]: Without dead ends: 64712 [2021-06-05 22:58:35,231 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:58:35,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64712 states. [2021-06-05 22:58:36,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64712 to 64330. [2021-06-05 22:58:36,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64330 states, 64329 states have (on average 3.592516594382005) internal successors, (231103), 64329 states have internal predecessors, (231103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:36,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64330 states to 64330 states and 231103 transitions. [2021-06-05 22:58:36,989 INFO L78 Accepts]: Start accepts. Automaton has 64330 states and 231103 transitions. Word has length 23 [2021-06-05 22:58:36,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:36,989 INFO L482 AbstractCegarLoop]: Abstraction has 64330 states and 231103 transitions. [2021-06-05 22:58:36,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:36,989 INFO L276 IsEmpty]: Start isEmpty. Operand 64330 states and 231103 transitions. [2021-06-05 22:58:37,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:58:37,061 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:37,061 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:37,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 22:58:37,262 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:37,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:37,263 INFO L82 PathProgramCache]: Analyzing trace with hash -854673189, now seen corresponding path program 21 times [2021-06-05 22:58:37,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:37,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137661875] [2021-06-05 22:58:37,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:37,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:37,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:37,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137661875] [2021-06-05 22:58:37,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137661875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:37,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017958628] [2021-06-05 22:58:37,302 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:37,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:58:37,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:37,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:58:37,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:37,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017958628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:37,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:37,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 22:58:37,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123856791] [2021-06-05 22:58:37,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:58:37,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:37,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:58:37,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:58:37,393 INFO L87 Difference]: Start difference. First operand 64330 states and 231103 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:38,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:38,104 INFO L93 Difference]: Finished difference Result 123260 states and 445775 transitions. [2021-06-05 22:58:38,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:58:38,105 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:58:38,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:38,855 INFO L225 Difference]: With dead ends: 123260 [2021-06-05 22:58:38,855 INFO L226 Difference]: Without dead ends: 123260 [2021-06-05 22:58:38,856 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:58:38,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123260 states. [2021-06-05 22:58:40,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123260 to 75397. [2021-06-05 22:58:40,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75397 states, 75396 states have (on average 3.5951376730861053) internal successors, (271059), 75396 states have internal predecessors, (271059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75397 states to 75397 states and 271059 transitions. [2021-06-05 22:58:40,705 INFO L78 Accepts]: Start accepts. Automaton has 75397 states and 271059 transitions. Word has length 25 [2021-06-05 22:58:40,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:40,705 INFO L482 AbstractCegarLoop]: Abstraction has 75397 states and 271059 transitions. [2021-06-05 22:58:40,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:40,705 INFO L276 IsEmpty]: Start isEmpty. Operand 75397 states and 271059 transitions. [2021-06-05 22:58:40,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:58:40,816 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:40,816 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:41,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:41,017 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:41,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1488955305, now seen corresponding path program 46 times [2021-06-05 22:58:41,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:41,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710536207] [2021-06-05 22:58:41,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:41,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:41,401 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 22:58:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:41,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:41,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710536207] [2021-06-05 22:58:41,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710536207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:41,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101935405] [2021-06-05 22:58:41,454 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 22:58:41,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:58:41,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:41,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:58:41,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:41,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:41,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101935405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:41,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:41,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 22:58:41,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26436671] [2021-06-05 22:58:41,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:58:41,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:41,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:58:41,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:58:41,690 INFO L87 Difference]: Start difference. First operand 75397 states and 271059 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:42,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:42,100 INFO L93 Difference]: Finished difference Result 76364 states and 274028 transitions. [2021-06-05 22:58:42,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:58:42,101 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:58:42,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:42,295 INFO L225 Difference]: With dead ends: 76364 [2021-06-05 22:58:42,295 INFO L226 Difference]: Without dead ends: 76324 [2021-06-05 22:58:42,296 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 423.9ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:58:42,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76324 states. [2021-06-05 22:58:43,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76324 to 75532. [2021-06-05 22:58:43,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75532 states, 75531 states have (on average 3.5951993221326344) internal successors, (271549), 75531 states have internal predecessors, (271549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:44,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75532 states to 75532 states and 271549 transitions. [2021-06-05 22:58:44,273 INFO L78 Accepts]: Start accepts. Automaton has 75532 states and 271549 transitions. Word has length 25 [2021-06-05 22:58:44,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:44,273 INFO L482 AbstractCegarLoop]: Abstraction has 75532 states and 271549 transitions. [2021-06-05 22:58:44,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:44,273 INFO L276 IsEmpty]: Start isEmpty. Operand 75532 states and 271549 transitions. [2021-06-05 22:58:44,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:58:44,371 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:44,372 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:44,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:44,572 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:44,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:44,572 INFO L82 PathProgramCache]: Analyzing trace with hash 608516245, now seen corresponding path program 47 times [2021-06-05 22:58:44,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:44,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768158923] [2021-06-05 22:58:44,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:44,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:44,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768158923] [2021-06-05 22:58:44,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768158923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:44,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630245231] [2021-06-05 22:58:44,634 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:44,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:58:44,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:44,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:58:44,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:44,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630245231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:44,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:44,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 22:58:44,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94756870] [2021-06-05 22:58:44,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:58:44,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:44,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:58:44,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:58:44,713 INFO L87 Difference]: Start difference. First operand 75532 states and 271549 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:45,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:45,088 INFO L93 Difference]: Finished difference Result 77328 states and 277251 transitions. [2021-06-05 22:58:45,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:58:45,089 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:58:45,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:45,284 INFO L225 Difference]: With dead ends: 77328 [2021-06-05 22:58:45,284 INFO L226 Difference]: Without dead ends: 77263 [2021-06-05 22:58:45,284 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:58:45,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77263 states. [2021-06-05 22:58:46,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77263 to 75779. [2021-06-05 22:58:46,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75779 states, 75778 states have (on average 3.595476259600412) internal successors, (272458), 75778 states have internal predecessors, (272458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:47,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75779 states to 75779 states and 272458 transitions. [2021-06-05 22:58:47,487 INFO L78 Accepts]: Start accepts. Automaton has 75779 states and 272458 transitions. Word has length 25 [2021-06-05 22:58:47,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:47,487 INFO L482 AbstractCegarLoop]: Abstraction has 75779 states and 272458 transitions. [2021-06-05 22:58:47,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:47,487 INFO L276 IsEmpty]: Start isEmpty. Operand 75779 states and 272458 transitions. [2021-06-05 22:58:47,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:58:47,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:47,593 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:47,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:47,797 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:47,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:47,797 INFO L82 PathProgramCache]: Analyzing trace with hash -924915699, now seen corresponding path program 48 times [2021-06-05 22:58:47,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:47,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913608484] [2021-06-05 22:58:47,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:47,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:47,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913608484] [2021-06-05 22:58:47,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913608484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:47,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216955422] [2021-06-05 22:58:47,851 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:47,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:58:47,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:47,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:58:47,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:47,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:47,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216955422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:47,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:47,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:58:47,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049419705] [2021-06-05 22:58:47,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:58:47,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:47,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:58:47,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:58:47,927 INFO L87 Difference]: Start difference. First operand 75779 states and 272458 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:48,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:48,302 INFO L93 Difference]: Finished difference Result 77024 states and 276140 transitions. [2021-06-05 22:58:48,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:58:48,303 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:58:48,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:48,520 INFO L225 Difference]: With dead ends: 77024 [2021-06-05 22:58:48,521 INFO L226 Difference]: Without dead ends: 76999 [2021-06-05 22:58:48,521 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:58:48,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76999 states. [2021-06-05 22:58:50,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76999 to 75956. [2021-06-05 22:58:50,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75956 states, 75955 states have (on average 3.595707984991113) internal successors, (273112), 75955 states have internal predecessors, (273112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:50,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75956 states to 75956 states and 273112 transitions. [2021-06-05 22:58:50,533 INFO L78 Accepts]: Start accepts. Automaton has 75956 states and 273112 transitions. Word has length 25 [2021-06-05 22:58:50,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:50,533 INFO L482 AbstractCegarLoop]: Abstraction has 75956 states and 273112 transitions. [2021-06-05 22:58:50,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:50,533 INFO L276 IsEmpty]: Start isEmpty. Operand 75956 states and 273112 transitions. [2021-06-05 22:58:50,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:58:50,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:50,638 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:50,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-06-05 22:58:50,839 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:50,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:50,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1967521705, now seen corresponding path program 49 times [2021-06-05 22:58:50,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:50,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187329021] [2021-06-05 22:58:50,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:50,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:50,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187329021] [2021-06-05 22:58:50,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187329021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:50,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106017911] [2021-06-05 22:58:50,891 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:50,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:58:50,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:50,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106017911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:50,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:50,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:58:50,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951206896] [2021-06-05 22:58:50,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:58:50,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:50,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:58:50,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:58:50,970 INFO L87 Difference]: Start difference. First operand 75956 states and 273112 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:51,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:51,371 INFO L93 Difference]: Finished difference Result 77120 states and 276543 transitions. [2021-06-05 22:58:51,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:58:51,371 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:58:51,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:51,563 INFO L225 Difference]: With dead ends: 77120 [2021-06-05 22:58:51,563 INFO L226 Difference]: Without dead ends: 77074 [2021-06-05 22:58:51,563 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:58:51,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77074 states. [2021-06-05 22:58:53,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77074 to 76028. [2021-06-05 22:58:53,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76028 states, 76027 states have (on average 3.596209241453694) internal successors, (273409), 76027 states have internal predecessors, (273409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:53,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76028 states to 76028 states and 273409 transitions. [2021-06-05 22:58:53,682 INFO L78 Accepts]: Start accepts. Automaton has 76028 states and 273409 transitions. Word has length 25 [2021-06-05 22:58:53,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:53,682 INFO L482 AbstractCegarLoop]: Abstraction has 76028 states and 273409 transitions. [2021-06-05 22:58:53,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:53,682 INFO L276 IsEmpty]: Start isEmpty. Operand 76028 states and 273409 transitions. [2021-06-05 22:58:53,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:58:53,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:53,783 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:53,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:53,984 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:53,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:53,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1225531439, now seen corresponding path program 50 times [2021-06-05 22:58:53,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:53,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767274480] [2021-06-05 22:58:53,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:54,048 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:58:54,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:54,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767274480] [2021-06-05 22:58:54,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767274480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:54,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144855949] [2021-06-05 22:58:54,049 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:54,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:58:54,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:54,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:58:54,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:58:54,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144855949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:54,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:54,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:58:54,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151202087] [2021-06-05 22:58:54,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:58:54,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:54,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:58:54,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:58:54,127 INFO L87 Difference]: Start difference. First operand 76028 states and 273409 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:54,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:54,500 INFO L93 Difference]: Finished difference Result 77628 states and 278332 transitions. [2021-06-05 22:58:54,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:58:54,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:58:54,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:54,701 INFO L225 Difference]: With dead ends: 77628 [2021-06-05 22:58:54,702 INFO L226 Difference]: Without dead ends: 77580 [2021-06-05 22:58:54,702 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:58:54,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77580 states. [2021-06-05 22:58:56,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77580 to 76129. [2021-06-05 22:58:56,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76129 states, 76128 states have (on average 3.596876313577133) internal successors, (273823), 76128 states have internal predecessors, (273823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:56,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76129 states to 76129 states and 273823 transitions. [2021-06-05 22:58:56,600 INFO L78 Accepts]: Start accepts. Automaton has 76129 states and 273823 transitions. Word has length 25 [2021-06-05 22:58:56,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:56,600 INFO L482 AbstractCegarLoop]: Abstraction has 76129 states and 273823 transitions. [2021-06-05 22:58:56,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:56,600 INFO L276 IsEmpty]: Start isEmpty. Operand 76129 states and 273823 transitions. [2021-06-05 22:58:56,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:58:56,701 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:56,701 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:56,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 22:58:56,902 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:56,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:56,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1862961165, now seen corresponding path program 51 times [2021-06-05 22:58:56,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:56,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483617725] [2021-06-05 22:58:56,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:56,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:56,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483617725] [2021-06-05 22:58:56,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483617725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:56,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442363495] [2021-06-05 22:58:56,985 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:57,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:58:57,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:57,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:58:57,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:57,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442363495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:57,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:57,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 22:58:57,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318528770] [2021-06-05 22:58:57,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:58:57,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:57,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:58:57,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:58:57,069 INFO L87 Difference]: Start difference. First operand 76129 states and 273823 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:57,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:57,536 INFO L93 Difference]: Finished difference Result 79341 states and 284167 transitions. [2021-06-05 22:58:57,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:58:57,537 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:58:57,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:57,741 INFO L225 Difference]: With dead ends: 79341 [2021-06-05 22:58:57,741 INFO L226 Difference]: Without dead ends: 79297 [2021-06-05 22:58:57,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:58:58,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79297 states. [2021-06-05 22:58:59,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79297 to 76278. [2021-06-05 22:58:59,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76278 states, 76277 states have (on average 3.598096411762392) internal successors, (274452), 76277 states have internal predecessors, (274452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:59,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76278 states to 76278 states and 274452 transitions. [2021-06-05 22:58:59,865 INFO L78 Accepts]: Start accepts. Automaton has 76278 states and 274452 transitions. Word has length 25 [2021-06-05 22:58:59,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:59,865 INFO L482 AbstractCegarLoop]: Abstraction has 76278 states and 274452 transitions. [2021-06-05 22:58:59,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:59,865 INFO L276 IsEmpty]: Start isEmpty. Operand 76278 states and 274452 transitions. [2021-06-05 22:58:59,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:58:59,974 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:59,974 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:00,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 22:59:00,175 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:00,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:00,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1408824429, now seen corresponding path program 22 times [2021-06-05 22:59:00,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:00,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671871694] [2021-06-05 22:59:00,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:00,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:00,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671871694] [2021-06-05 22:59:00,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671871694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:00,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167863042] [2021-06-05 22:59:00,212 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:00,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:59:00,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:00,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:59:00,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:00,315 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:00,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167863042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:00,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:00,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:59:00,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902659382] [2021-06-05 22:59:00,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:59:00,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:00,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:59:00,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:59:00,316 INFO L87 Difference]: Start difference. First operand 76278 states and 274452 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-06-05 22:59:01,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:01,380 INFO L93 Difference]: Finished difference Result 98993 states and 359845 transitions. [2021-06-05 22:59:01,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:59:01,393 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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 25 [2021-06-05 22:59:01,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:01,741 INFO L225 Difference]: With dead ends: 98993 [2021-06-05 22:59:01,742 INFO L226 Difference]: Without dead ends: 98979 [2021-06-05 22:59:01,742 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:59:01,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98979 states. [2021-06-05 22:59:02,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98979 to 21029. [2021-06-05 22:59:02,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21029 states, 21028 states have (on average 3.6255468898611376) internal successors, (76238), 21028 states have internal predecessors, (76238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:02,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21029 states to 21029 states and 76238 transitions. [2021-06-05 22:59:02,539 INFO L78 Accepts]: Start accepts. Automaton has 21029 states and 76238 transitions. Word has length 25 [2021-06-05 22:59:02,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:02,540 INFO L482 AbstractCegarLoop]: Abstraction has 21029 states and 76238 transitions. [2021-06-05 22:59:02,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-06-05 22:59:02,540 INFO L276 IsEmpty]: Start isEmpty. Operand 21029 states and 76238 transitions. [2021-06-05 22:59:02,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:59:02,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:02,566 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:02,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 22:59:02,767 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:02,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:02,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1278968941, now seen corresponding path program 23 times [2021-06-05 22:59:02,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:02,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011702918] [2021-06-05 22:59:02,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:02,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:02,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:02,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011702918] [2021-06-05 22:59:02,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011702918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:02,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118120122] [2021-06-05 22:59:02,799 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:02,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:59:02,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:02,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:59:02,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:03,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118120122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:03,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:03,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 22:59:03,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887672112] [2021-06-05 22:59:03,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:59:03,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:03,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:59:03,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:59:03,238 INFO L87 Difference]: Start difference. First operand 21029 states and 76238 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-06-05 22:59:03,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:03,623 INFO L93 Difference]: Finished difference Result 52085 states and 187899 transitions. [2021-06-05 22:59:03,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:59:03,624 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 25 [2021-06-05 22:59:03,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:03,746 INFO L225 Difference]: With dead ends: 52085 [2021-06-05 22:59:03,746 INFO L226 Difference]: Without dead ends: 52085 [2021-06-05 22:59:03,746 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 461.2ms TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:59:03,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52085 states. [2021-06-05 22:59:04,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52085 to 48537. [2021-06-05 22:59:04,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48537 states, 48536 states have (on average 3.635569474204714) internal successors, (176456), 48536 states have internal predecessors, (176456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:04,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48537 states to 48537 states and 176456 transitions. [2021-06-05 22:59:04,891 INFO L78 Accepts]: Start accepts. Automaton has 48537 states and 176456 transitions. Word has length 25 [2021-06-05 22:59:04,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:04,891 INFO L482 AbstractCegarLoop]: Abstraction has 48537 states and 176456 transitions. [2021-06-05 22:59:04,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-06-05 22:59:04,892 INFO L276 IsEmpty]: Start isEmpty. Operand 48537 states and 176456 transitions. [2021-06-05 22:59:04,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:59:04,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:04,962 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:05,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 22:59:05,163 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:05,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:05,163 INFO L82 PathProgramCache]: Analyzing trace with hash -793164837, now seen corresponding path program 24 times [2021-06-05 22:59:05,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:05,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294288428] [2021-06-05 22:59:05,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:05,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:05,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:05,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294288428] [2021-06-05 22:59:05,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294288428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:05,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292954840] [2021-06-05 22:59:05,209 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:05,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:59:05,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:05,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:59:05,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:05,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292954840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:05,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:05,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 22:59:05,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86951484] [2021-06-05 22:59:05,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:59:05,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:05,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:59:05,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:59:05,312 INFO L87 Difference]: Start difference. First operand 48537 states and 176456 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-06-05 22:59:05,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:05,788 INFO L93 Difference]: Finished difference Result 60283 states and 218124 transitions. [2021-06-05 22:59:05,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:59:05,788 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 25 [2021-06-05 22:59:05,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:05,951 INFO L225 Difference]: With dead ends: 60283 [2021-06-05 22:59:05,951 INFO L226 Difference]: Without dead ends: 60283 [2021-06-05 22:59:05,951 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:59:06,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60283 states. [2021-06-05 22:59:06,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60283 to 48697. [2021-06-05 22:59:06,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48697 states, 48696 states have (on average 3.6408739937571872) internal successors, (177296), 48696 states have internal predecessors, (177296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:07,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48697 states to 48697 states and 177296 transitions. [2021-06-05 22:59:07,130 INFO L78 Accepts]: Start accepts. Automaton has 48697 states and 177296 transitions. Word has length 25 [2021-06-05 22:59:07,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:07,130 INFO L482 AbstractCegarLoop]: Abstraction has 48697 states and 177296 transitions. [2021-06-05 22:59:07,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-06-05 22:59:07,130 INFO L276 IsEmpty]: Start isEmpty. Operand 48697 states and 177296 transitions. [2021-06-05 22:59:07,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:59:07,194 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:07,194 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:07,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:07,395 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:07,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:07,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1183569831, now seen corresponding path program 52 times [2021-06-05 22:59:07,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:07,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934668473] [2021-06-05 22:59:07,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:07,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:07,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:07,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934668473] [2021-06-05 22:59:07,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934668473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:07,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665560337] [2021-06-05 22:59:07,475 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:07,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:59:07,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:07,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:59:07,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:07,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665560337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:07,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:07,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:59:07,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59888579] [2021-06-05 22:59:07,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:59:07,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:07,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:59:07,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:59:07,630 INFO L87 Difference]: Start difference. First operand 48697 states and 177296 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:08,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:08,437 INFO L93 Difference]: Finished difference Result 49947 states and 180898 transitions. [2021-06-05 22:59:08,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:59:08,447 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:59:08,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:08,574 INFO L225 Difference]: With dead ends: 49947 [2021-06-05 22:59:08,574 INFO L226 Difference]: Without dead ends: 49819 [2021-06-05 22:59:08,574 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 174.3ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:59:08,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49819 states. [2021-06-05 22:59:09,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49819 to 48821. [2021-06-05 22:59:09,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48821 states, 48820 states have (on average 3.6405981155264238) internal successors, (177734), 48820 states have internal predecessors, (177734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:09,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48821 states to 48821 states and 177734 transitions. [2021-06-05 22:59:09,403 INFO L78 Accepts]: Start accepts. Automaton has 48821 states and 177734 transitions. Word has length 25 [2021-06-05 22:59:09,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:09,403 INFO L482 AbstractCegarLoop]: Abstraction has 48821 states and 177734 transitions. [2021-06-05 22:59:09,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:09,403 INFO L276 IsEmpty]: Start isEmpty. Operand 48821 states and 177734 transitions. [2021-06-05 22:59:09,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:59:09,768 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:09,768 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:09,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:09,969 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:09,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:09,969 INFO L82 PathProgramCache]: Analyzing trace with hash -735311471, now seen corresponding path program 53 times [2021-06-05 22:59:09,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:09,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256458375] [2021-06-05 22:59:09,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:10,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:10,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256458375] [2021-06-05 22:59:10,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256458375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:10,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703699265] [2021-06-05 22:59:10,038 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:10,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:59:10,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:10,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:59:10,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:10,176 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:10,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703699265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:10,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:10,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:59:10,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945754109] [2021-06-05 22:59:10,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:59:10,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:10,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:59:10,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:59:10,177 INFO L87 Difference]: Start difference. First operand 48821 states and 177734 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:10,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:10,605 INFO L93 Difference]: Finished difference Result 49466 states and 179432 transitions. [2021-06-05 22:59:10,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:59:10,605 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:59:10,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:10,721 INFO L225 Difference]: With dead ends: 49466 [2021-06-05 22:59:10,721 INFO L226 Difference]: Without dead ends: 49403 [2021-06-05 22:59:10,721 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 153.6ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:59:10,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49403 states. [2021-06-05 22:59:11,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49403 to 48835. [2021-06-05 22:59:11,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48835 states, 48834 states have (on average 3.640312077650817) internal successors, (177771), 48834 states have internal predecessors, (177771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:11,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48835 states to 48835 states and 177771 transitions. [2021-06-05 22:59:11,780 INFO L78 Accepts]: Start accepts. Automaton has 48835 states and 177771 transitions. Word has length 25 [2021-06-05 22:59:11,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:11,780 INFO L482 AbstractCegarLoop]: Abstraction has 48835 states and 177771 transitions. [2021-06-05 22:59:11,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:11,780 INFO L276 IsEmpty]: Start isEmpty. Operand 48835 states and 177771 transitions. [2021-06-05 22:59:11,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:59:11,838 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:11,838 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:12,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 22:59:12,039 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:12,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:12,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1650392959, now seen corresponding path program 54 times [2021-06-05 22:59:12,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:12,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829237213] [2021-06-05 22:59:12,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:12,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:12,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:12,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829237213] [2021-06-05 22:59:12,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829237213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:12,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183112269] [2021-06-05 22:59:12,102 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:12,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:59:12,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:12,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:59:12,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:12,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183112269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:12,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:12,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:59:12,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877498649] [2021-06-05 22:59:12,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:59:12,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:12,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:59:12,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:59:12,228 INFO L87 Difference]: Start difference. First operand 48835 states and 177771 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:12,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:12,689 INFO L93 Difference]: Finished difference Result 50050 states and 181095 transitions. [2021-06-05 22:59:12,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:59:12,689 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:59:12,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:12,804 INFO L225 Difference]: With dead ends: 50050 [2021-06-05 22:59:12,805 INFO L226 Difference]: Without dead ends: 49977 [2021-06-05 22:59:12,805 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 173.3ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:59:12,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49977 states. [2021-06-05 22:59:13,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49977 to 48876. [2021-06-05 22:59:13,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48876 states, 48875 states have (on average 3.6402046035805626) internal successors, (177915), 48875 states have internal predecessors, (177915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:13,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48876 states to 48876 states and 177915 transitions. [2021-06-05 22:59:13,918 INFO L78 Accepts]: Start accepts. Automaton has 48876 states and 177915 transitions. Word has length 25 [2021-06-05 22:59:13,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:13,918 INFO L482 AbstractCegarLoop]: Abstraction has 48876 states and 177915 transitions. [2021-06-05 22:59:13,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:13,918 INFO L276 IsEmpty]: Start isEmpty. Operand 48876 states and 177915 transitions. [2021-06-05 22:59:13,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:59:13,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:13,977 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:14,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:14,178 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:14,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:14,178 INFO L82 PathProgramCache]: Analyzing trace with hash 697526461, now seen corresponding path program 55 times [2021-06-05 22:59:14,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:14,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619621232] [2021-06-05 22:59:14,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:14,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:14,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:14,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619621232] [2021-06-05 22:59:14,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619621232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:14,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957032696] [2021-06-05 22:59:14,243 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:14,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:59:14,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:14,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:14,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957032696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:14,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:14,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:59:14,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543049937] [2021-06-05 22:59:14,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:59:14,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:14,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:59:14,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:59:14,387 INFO L87 Difference]: Start difference. First operand 48876 states and 177915 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:15,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:15,297 INFO L93 Difference]: Finished difference Result 49588 states and 179721 transitions. [2021-06-05 22:59:15,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:59:15,297 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:59:15,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:15,406 INFO L225 Difference]: With dead ends: 49588 [2021-06-05 22:59:15,406 INFO L226 Difference]: Without dead ends: 49563 [2021-06-05 22:59:15,406 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 236.6ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:59:15,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49563 states. [2021-06-05 22:59:15,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49563 to 48888. [2021-06-05 22:59:16,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48888 states, 48887 states have (on average 3.6404770184302575) internal successors, (177972), 48887 states have internal predecessors, (177972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:16,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48888 states to 48888 states and 177972 transitions. [2021-06-05 22:59:16,154 INFO L78 Accepts]: Start accepts. Automaton has 48888 states and 177972 transitions. Word has length 25 [2021-06-05 22:59:16,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:16,154 INFO L482 AbstractCegarLoop]: Abstraction has 48888 states and 177972 transitions. [2021-06-05 22:59:16,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:16,155 INFO L276 IsEmpty]: Start isEmpty. Operand 48888 states and 177972 transitions. [2021-06-05 22:59:16,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:59:16,214 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:16,214 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:16,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 22:59:16,514 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:16,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:16,514 INFO L82 PathProgramCache]: Analyzing trace with hash 982042531, now seen corresponding path program 56 times [2021-06-05 22:59:16,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:16,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239452648] [2021-06-05 22:59:16,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:16,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:16,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:16,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239452648] [2021-06-05 22:59:16,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239452648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:16,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111489104] [2021-06-05 22:59:16,610 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:16,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:59:16,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:16,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:59:16,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:16,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:16,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111489104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:16,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:16,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:59:16,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112231555] [2021-06-05 22:59:16,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:59:16,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:16,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:59:16,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:59:16,726 INFO L87 Difference]: Start difference. First operand 48888 states and 177972 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:17,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:17,061 INFO L93 Difference]: Finished difference Result 50065 states and 181714 transitions. [2021-06-05 22:59:17,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:59:17,061 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:59:17,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:17,179 INFO L225 Difference]: With dead ends: 50065 [2021-06-05 22:59:17,180 INFO L226 Difference]: Without dead ends: 49947 [2021-06-05 22:59:17,180 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:59:17,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49947 states. [2021-06-05 22:59:18,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49947 to 49035. [2021-06-05 22:59:18,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49035 states, 49034 states have (on average 3.640331198760044) internal successors, (178500), 49034 states have internal predecessors, (178500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:18,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49035 states to 49035 states and 178500 transitions. [2021-06-05 22:59:18,295 INFO L78 Accepts]: Start accepts. Automaton has 49035 states and 178500 transitions. Word has length 25 [2021-06-05 22:59:18,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:18,295 INFO L482 AbstractCegarLoop]: Abstraction has 49035 states and 178500 transitions. [2021-06-05 22:59:18,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:18,295 INFO L276 IsEmpty]: Start isEmpty. Operand 49035 states and 178500 transitions. [2021-06-05 22:59:18,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:59:18,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:18,357 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:18,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:18,557 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:18,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:18,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1430300891, now seen corresponding path program 57 times [2021-06-05 22:59:18,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:18,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911828650] [2021-06-05 22:59:18,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:18,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:18,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:18,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911828650] [2021-06-05 22:59:18,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911828650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:18,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615932610] [2021-06-05 22:59:18,620 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:18,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:59:18,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:18,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:59:18,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:18,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615932610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:18,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:18,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:59:18,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377240158] [2021-06-05 22:59:18,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:59:18,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:18,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:59:18,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:59:18,770 INFO L87 Difference]: Start difference. First operand 49035 states and 178500 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:19,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:19,246 INFO L93 Difference]: Finished difference Result 49758 states and 180665 transitions. [2021-06-05 22:59:19,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:59:19,246 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:59:19,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:19,363 INFO L225 Difference]: With dead ends: 49758 [2021-06-05 22:59:19,363 INFO L226 Difference]: Without dead ends: 49695 [2021-06-05 22:59:19,363 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 151.2ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:59:19,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49695 states. [2021-06-05 22:59:20,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49695 to 49053. [2021-06-05 22:59:20,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49053 states, 49052 states have (on average 3.640218543586398) internal successors, (178560), 49052 states have internal predecessors, (178560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:20,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49053 states to 49053 states and 178560 transitions. [2021-06-05 22:59:20,475 INFO L78 Accepts]: Start accepts. Automaton has 49053 states and 178560 transitions. Word has length 25 [2021-06-05 22:59:20,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:20,475 INFO L482 AbstractCegarLoop]: Abstraction has 49053 states and 178560 transitions. [2021-06-05 22:59:20,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:20,475 INFO L276 IsEmpty]: Start isEmpty. Operand 49053 states and 178560 transitions. [2021-06-05 22:59:20,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:59:20,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:20,536 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:20,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-05 22:59:20,736 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:20,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:20,736 INFO L82 PathProgramCache]: Analyzing trace with hash 515219403, now seen corresponding path program 58 times [2021-06-05 22:59:20,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:20,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117728321] [2021-06-05 22:59:20,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:20,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:20,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117728321] [2021-06-05 22:59:20,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117728321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:20,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400531963] [2021-06-05 22:59:20,807 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:20,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:59:20,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:20,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:59:20,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:20,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400531963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:20,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:20,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:59:20,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421203691] [2021-06-05 22:59:20,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:59:20,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:20,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:59:20,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:59:20,942 INFO L87 Difference]: Start difference. First operand 49053 states and 178560 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:21,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:21,844 INFO L93 Difference]: Finished difference Result 50900 states and 184438 transitions. [2021-06-05 22:59:21,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:59:21,844 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:59:21,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:21,996 INFO L225 Difference]: With dead ends: 50900 [2021-06-05 22:59:21,996 INFO L226 Difference]: Without dead ends: 50875 [2021-06-05 22:59:21,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 196.6ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:59:22,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50875 states. [2021-06-05 22:59:22,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50875 to 49168. [2021-06-05 22:59:22,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49168 states, 49167 states have (on average 3.642280391319381) internal successors, (179080), 49167 states have internal predecessors, (179080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:22,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49168 states to 49168 states and 179080 transitions. [2021-06-05 22:59:22,847 INFO L78 Accepts]: Start accepts. Automaton has 49168 states and 179080 transitions. Word has length 25 [2021-06-05 22:59:22,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:22,847 INFO L482 AbstractCegarLoop]: Abstraction has 49168 states and 179080 transitions. [2021-06-05 22:59:22,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:22,848 INFO L276 IsEmpty]: Start isEmpty. Operand 49168 states and 179080 transitions. [2021-06-05 22:59:23,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:59:23,281 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:23,281 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:23,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2021-06-05 22:59:23,502 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:23,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:23,503 INFO L82 PathProgramCache]: Analyzing trace with hash -434468137, now seen corresponding path program 59 times [2021-06-05 22:59:23,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:23,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820958638] [2021-06-05 22:59:23,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:23,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:23,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820958638] [2021-06-05 22:59:23,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820958638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:23,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351375471] [2021-06-05 22:59:23,531 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:23,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:59:23,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:23,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:59:23,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:23,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:23,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351375471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:23,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:23,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-06-05 22:59:23,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151634231] [2021-06-05 22:59:23,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:59:23,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:23,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:59:23,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:59:23,639 INFO L87 Difference]: Start difference. First operand 49168 states and 179080 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:24,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:24,175 INFO L93 Difference]: Finished difference Result 92519 states and 337531 transitions. [2021-06-05 22:59:24,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:59:24,176 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:59:24,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:24,419 INFO L225 Difference]: With dead ends: 92519 [2021-06-05 22:59:24,420 INFO L226 Difference]: Without dead ends: 92495 [2021-06-05 22:59:24,420 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:59:24,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92495 states. [2021-06-05 22:59:25,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92495 to 90624. [2021-06-05 22:59:26,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90624 states, 90623 states have (on average 3.6490736347284907) internal successors, (330690), 90623 states have internal predecessors, (330690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:26,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90624 states to 90624 states and 330690 transitions. [2021-06-05 22:59:26,787 INFO L78 Accepts]: Start accepts. Automaton has 90624 states and 330690 transitions. Word has length 25 [2021-06-05 22:59:26,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:26,787 INFO L482 AbstractCegarLoop]: Abstraction has 90624 states and 330690 transitions. [2021-06-05 22:59:26,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:26,787 INFO L276 IsEmpty]: Start isEmpty. Operand 90624 states and 330690 transitions. [2021-06-05 22:59:26,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:59:26,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:26,903 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:27,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 22:59:27,103 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:27,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:27,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1866838691, now seen corresponding path program 60 times [2021-06-05 22:59:27,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:27,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841331610] [2021-06-05 22:59:27,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:27,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:27,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:27,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841331610] [2021-06-05 22:59:27,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841331610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:27,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410209038] [2021-06-05 22:59:27,138 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:27,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:59:27,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:27,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:59:27,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:27,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:27,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410209038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:27,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:27,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 22:59:27,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250477374] [2021-06-05 22:59:27,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:59:27,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:27,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:59:27,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:59:27,246 INFO L87 Difference]: Start difference. First operand 90624 states and 330690 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:28,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:28,788 INFO L93 Difference]: Finished difference Result 137171 states and 502327 transitions. [2021-06-05 22:59:28,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:59:28,788 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:59:28,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:29,453 INFO L225 Difference]: With dead ends: 137171 [2021-06-05 22:59:29,454 INFO L226 Difference]: Without dead ends: 137155 [2021-06-05 22:59:29,454 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:59:29,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137155 states. [2021-06-05 22:59:31,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137155 to 75753. [2021-06-05 22:59:31,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75753 states, 75752 states have (on average 3.641699229063259) internal successors, (275866), 75752 states have internal predecessors, (275866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:32,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75753 states to 75753 states and 275866 transitions. [2021-06-05 22:59:32,044 INFO L78 Accepts]: Start accepts. Automaton has 75753 states and 275866 transitions. Word has length 25 [2021-06-05 22:59:32,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:32,045 INFO L482 AbstractCegarLoop]: Abstraction has 75753 states and 275866 transitions. [2021-06-05 22:59:32,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:32,045 INFO L276 IsEmpty]: Start isEmpty. Operand 75753 states and 275866 transitions. [2021-06-05 22:59:32,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:59:32,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:32,169 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:32,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:32,370 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:32,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:32,370 INFO L82 PathProgramCache]: Analyzing trace with hash 2025324127, now seen corresponding path program 61 times [2021-06-05 22:59:32,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:32,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114949968] [2021-06-05 22:59:32,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:32,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:32,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:32,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114949968] [2021-06-05 22:59:32,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114949968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:32,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986984591] [2021-06-05 22:59:32,466 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:32,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:59:32,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:32,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986984591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:32,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:32,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:59:32,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313335719] [2021-06-05 22:59:32,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:59:32,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:32,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:59:32,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:59:32,603 INFO L87 Difference]: Start difference. First operand 75753 states and 275866 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:33,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:33,068 INFO L93 Difference]: Finished difference Result 76022 states and 276650 transitions. [2021-06-05 22:59:33,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:59:33,069 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:59:33,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:33,260 INFO L225 Difference]: With dead ends: 76022 [2021-06-05 22:59:33,260 INFO L226 Difference]: Without dead ends: 75973 [2021-06-05 22:59:33,260 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:59:33,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75973 states. [2021-06-05 22:59:34,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75973 to 75785. [2021-06-05 22:59:34,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75785 states, 75784 states have (on average 3.6417317639607303) internal successors, (275985), 75784 states have internal predecessors, (275985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:35,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75785 states to 75785 states and 275985 transitions. [2021-06-05 22:59:35,004 INFO L78 Accepts]: Start accepts. Automaton has 75785 states and 275985 transitions. Word has length 25 [2021-06-05 22:59:35,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:35,004 INFO L482 AbstractCegarLoop]: Abstraction has 75785 states and 275985 transitions. [2021-06-05 22:59:35,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:35,004 INFO L276 IsEmpty]: Start isEmpty. Operand 75785 states and 275985 transitions. [2021-06-05 22:59:35,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:59:35,491 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:35,491 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:35,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:35,691 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:35,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:35,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1144885067, now seen corresponding path program 62 times [2021-06-05 22:59:35,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:35,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711216877] [2021-06-05 22:59:35,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:35,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:35,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:35,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711216877] [2021-06-05 22:59:35,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711216877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:35,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255390991] [2021-06-05 22:59:35,759 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:35,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:59:35,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:35,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:59:35,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:35,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255390991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:35,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:35,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:59:35,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198502271] [2021-06-05 22:59:35,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:59:35,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:35,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:59:35,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:59:35,863 INFO L87 Difference]: Start difference. First operand 75785 states and 275985 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:36,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:36,388 INFO L93 Difference]: Finished difference Result 76818 states and 279184 transitions. [2021-06-05 22:59:36,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:59:36,388 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:59:36,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:36,608 INFO L225 Difference]: With dead ends: 76818 [2021-06-05 22:59:36,608 INFO L226 Difference]: Without dead ends: 76793 [2021-06-05 22:59:36,608 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:59:36,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76793 states. [2021-06-05 22:59:38,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76793 to 75828. [2021-06-05 22:59:38,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75828 states, 75827 states have (on average 3.6418821791710076) internal successors, (276153), 75827 states have internal predecessors, (276153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:38,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75828 states to 75828 states and 276153 transitions. [2021-06-05 22:59:38,351 INFO L78 Accepts]: Start accepts. Automaton has 75828 states and 276153 transitions. Word has length 25 [2021-06-05 22:59:38,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:38,351 INFO L482 AbstractCegarLoop]: Abstraction has 75828 states and 276153 transitions. [2021-06-05 22:59:38,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:38,351 INFO L276 IsEmpty]: Start isEmpty. Operand 75828 states and 276153 transitions. [2021-06-05 22:59:38,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:59:38,795 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:38,795 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:39,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:39,009 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:39,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:39,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1821384809, now seen corresponding path program 63 times [2021-06-05 22:59:39,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:39,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707342775] [2021-06-05 22:59:39,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:39,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:39,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:39,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707342775] [2021-06-05 22:59:39,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707342775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:39,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239775332] [2021-06-05 22:59:39,085 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:39,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:59:39,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:39,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:59:39,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:39,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239775332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:39,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:39,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:59:39,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482781665] [2021-06-05 22:59:39,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:59:39,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:39,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:59:39,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:59:39,235 INFO L87 Difference]: Start difference. First operand 75828 states and 276153 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-06-05 22:59:39,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:39,796 INFO L93 Difference]: Finished difference Result 76411 states and 277746 transitions. [2021-06-05 22:59:39,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:59:39,797 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 25 [2021-06-05 22:59:39,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:39,990 INFO L225 Difference]: With dead ends: 76411 [2021-06-05 22:59:39,990 INFO L226 Difference]: Without dead ends: 76386 [2021-06-05 22:59:39,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 165.8ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:59:40,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76386 states. [2021-06-05 22:59:41,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76386 to 75829. [2021-06-05 22:59:41,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75829 states, 75828 states have (on average 3.641966028380018) internal successors, (276163), 75828 states have internal predecessors, (276163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:41,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75829 states to 75829 states and 276163 transitions. [2021-06-05 22:59:41,650 INFO L78 Accepts]: Start accepts. Automaton has 75829 states and 276163 transitions. Word has length 25 [2021-06-05 22:59:41,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:41,650 INFO L482 AbstractCegarLoop]: Abstraction has 75829 states and 276163 transitions. [2021-06-05 22:59:41,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-06-05 22:59:41,650 INFO L276 IsEmpty]: Start isEmpty. Operand 75829 states and 276163 transitions. [2021-06-05 22:59:42,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:59:42,076 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:42,077 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:42,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:42,289 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:42,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:42,289 INFO L82 PathProgramCache]: Analyzing trace with hash -484157037, now seen corresponding path program 64 times [2021-06-05 22:59:42,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:42,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930558611] [2021-06-05 22:59:42,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:42,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:42,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:42,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930558611] [2021-06-05 22:59:42,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930558611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:42,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140910703] [2021-06-05 22:59:42,320 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:42,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:59:42,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:42,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:59:42,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:42,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:42,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140910703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:42,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:42,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-06-05 22:59:42,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308730437] [2021-06-05 22:59:42,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:59:42,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:42,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:59:42,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:59:42,432 INFO L87 Difference]: Start difference. First operand 75829 states and 276163 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-06-05 22:59:42,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:42,889 INFO L93 Difference]: Finished difference Result 81206 states and 294898 transitions. [2021-06-05 22:59:42,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:59:42,889 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 25 [2021-06-05 22:59:42,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:43,096 INFO L225 Difference]: With dead ends: 81206 [2021-06-05 22:59:43,097 INFO L226 Difference]: Without dead ends: 81196 [2021-06-05 22:59:43,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:59:43,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81196 states. [2021-06-05 22:59:44,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81196 to 77254. [2021-06-05 22:59:44,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77254 states, 77253 states have (on average 3.640311703105381) internal successors, (281225), 77253 states have internal predecessors, (281225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:44,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77254 states to 77254 states and 281225 transitions. [2021-06-05 22:59:44,853 INFO L78 Accepts]: Start accepts. Automaton has 77254 states and 281225 transitions. Word has length 25 [2021-06-05 22:59:44,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:44,853 INFO L482 AbstractCegarLoop]: Abstraction has 77254 states and 281225 transitions. [2021-06-05 22:59:44,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-06-05 22:59:44,853 INFO L276 IsEmpty]: Start isEmpty. Operand 77254 states and 281225 transitions. [2021-06-05 22:59:44,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:59:44,960 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:44,960 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:45,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 22:59:45,160 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:45,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:45,161 INFO L82 PathProgramCache]: Analyzing trace with hash 697625119, now seen corresponding path program 65 times [2021-06-05 22:59:45,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:45,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825561690] [2021-06-05 22:59:45,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:45,491 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 22:59:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:45,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:45,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825561690] [2021-06-05 22:59:45,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825561690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:45,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516434974] [2021-06-05 22:59:45,581 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:45,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:59:45,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:45,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:59:45,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:45,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:45,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516434974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:45,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:45,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:59:45,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299470260] [2021-06-05 22:59:45,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:59:45,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:45,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:59:45,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:59:45,728 INFO L87 Difference]: Start difference. First operand 77254 states and 281225 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:46,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:46,255 INFO L93 Difference]: Finished difference Result 77680 states and 282481 transitions. [2021-06-05 22:59:46,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:59:46,256 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:59:46,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:46,473 INFO L225 Difference]: With dead ends: 77680 [2021-06-05 22:59:46,473 INFO L226 Difference]: Without dead ends: 77600 [2021-06-05 22:59:46,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 476.8ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:59:46,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77600 states. [2021-06-05 22:59:47,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77600 to 77302. [2021-06-05 22:59:47,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77302 states, 77301 states have (on average 3.6403280682009287) internal successors, (281401), 77301 states have internal predecessors, (281401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:48,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77302 states to 77302 states and 281401 transitions. [2021-06-05 22:59:48,138 INFO L78 Accepts]: Start accepts. Automaton has 77302 states and 281401 transitions. Word has length 25 [2021-06-05 22:59:48,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:48,138 INFO L482 AbstractCegarLoop]: Abstraction has 77302 states and 281401 transitions. [2021-06-05 22:59:48,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:48,138 INFO L276 IsEmpty]: Start isEmpty. Operand 77302 states and 281401 transitions. [2021-06-05 22:59:48,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:59:48,236 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:48,236 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:48,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-05 22:59:48,441 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:48,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:48,441 INFO L82 PathProgramCache]: Analyzing trace with hash -182813941, now seen corresponding path program 66 times [2021-06-05 22:59:48,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:48,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878466375] [2021-06-05 22:59:48,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:48,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:48,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:48,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878466375] [2021-06-05 22:59:48,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878466375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:48,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688290541] [2021-06-05 22:59:48,832 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:48,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:59:48,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:48,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:59:48,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:48,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:48,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688290541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:48,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:48,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:59:48,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439844568] [2021-06-05 22:59:48,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:59:48,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:48,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:59:48,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:59:48,963 INFO L87 Difference]: Start difference. First operand 77302 states and 281401 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:49,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:49,482 INFO L93 Difference]: Finished difference Result 78459 states and 284976 transitions. [2021-06-05 22:59:49,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:59:49,482 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:59:49,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:49,700 INFO L225 Difference]: With dead ends: 78459 [2021-06-05 22:59:49,700 INFO L226 Difference]: Without dead ends: 78434 [2021-06-05 22:59:49,700 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 447.7ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:59:49,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78434 states. [2021-06-05 22:59:51,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78434 to 77307. [2021-06-05 22:59:51,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77307 states, 77306 states have (on average 3.640351331073914) internal successors, (281421), 77306 states have internal predecessors, (281421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:51,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77307 states to 77307 states and 281421 transitions. [2021-06-05 22:59:51,376 INFO L78 Accepts]: Start accepts. Automaton has 77307 states and 281421 transitions. Word has length 25 [2021-06-05 22:59:51,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:51,376 INFO L482 AbstractCegarLoop]: Abstraction has 77307 states and 281421 transitions. [2021-06-05 22:59:51,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:51,376 INFO L276 IsEmpty]: Start isEmpty. Operand 77307 states and 281421 transitions. [2021-06-05 22:59:51,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:59:51,486 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:51,486 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:51,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:51,687 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:51,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:51,687 INFO L82 PathProgramCache]: Analyzing trace with hash -780291045, now seen corresponding path program 67 times [2021-06-05 22:59:51,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:51,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883795913] [2021-06-05 22:59:51,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:52,064 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:52,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:52,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883795913] [2021-06-05 22:59:52,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883795913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:52,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433183101] [2021-06-05 22:59:52,064 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:52,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:59:52,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:52,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433183101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:52,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:52,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:59:52,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528237302] [2021-06-05 22:59:52,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:59:52,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:52,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:59:52,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:59:52,225 INFO L87 Difference]: Start difference. First operand 77307 states and 281421 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:52,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:52,715 INFO L93 Difference]: Finished difference Result 77563 states and 282160 transitions. [2021-06-05 22:59:52,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:59:52,715 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:59:52,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:52,916 INFO L225 Difference]: With dead ends: 77563 [2021-06-05 22:59:52,917 INFO L226 Difference]: Without dead ends: 77530 [2021-06-05 22:59:52,917 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 424.2ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:59:52,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77530 states. [2021-06-05 22:59:54,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77530 to 77315. [2021-06-05 22:59:54,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77315 states, 77314 states have (on average 3.640336808340016) internal successors, (281449), 77314 states have internal predecessors, (281449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:54,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77315 states to 77315 states and 281449 transitions. [2021-06-05 22:59:54,578 INFO L78 Accepts]: Start accepts. Automaton has 77315 states and 281449 transitions. Word has length 25 [2021-06-05 22:59:54,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:54,578 INFO L482 AbstractCegarLoop]: Abstraction has 77315 states and 281449 transitions. [2021-06-05 22:59:54,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:54,578 INFO L276 IsEmpty]: Start isEmpty. Operand 77315 states and 281449 transitions. [2021-06-05 22:59:54,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:59:54,689 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:54,689 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:54,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 22:59:54,889 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:54,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:54,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1817699061, now seen corresponding path program 68 times [2021-06-05 22:59:54,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:54,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864771031] [2021-06-05 22:59:54,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:54,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:54,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864771031] [2021-06-05 22:59:54,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864771031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:54,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33392972] [2021-06-05 22:59:54,984 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:55,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:59:55,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:55,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:59:55,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:55,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33392972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:55,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:55,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:59:55,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59154055] [2021-06-05 22:59:55,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:59:55,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:55,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:59:55,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:59:55,459 INFO L87 Difference]: Start difference. First operand 77315 states and 281449 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:56,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:56,005 INFO L93 Difference]: Finished difference Result 77659 states and 282390 transitions. [2021-06-05 22:59:56,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:59:56,005 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:59:56,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:56,207 INFO L225 Difference]: With dead ends: 77659 [2021-06-05 22:59:56,207 INFO L226 Difference]: Without dead ends: 77589 [2021-06-05 22:59:56,207 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 503.0ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:59:56,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77589 states. [2021-06-05 22:59:57,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77589 to 77279. [2021-06-05 22:59:57,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77279 states, 77278 states have (on average 3.63971634876679) internal successors, (281270), 77278 states have internal predecessors, (281270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:57,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77279 states to 77279 states and 281270 transitions. [2021-06-05 22:59:57,864 INFO L78 Accepts]: Start accepts. Automaton has 77279 states and 281270 transitions. Word has length 25 [2021-06-05 22:59:57,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:57,864 INFO L482 AbstractCegarLoop]: Abstraction has 77279 states and 281270 transitions. [2021-06-05 22:59:57,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:57,864 INFO L276 IsEmpty]: Start isEmpty. Operand 77279 states and 281270 transitions. [2021-06-05 22:59:57,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:59:57,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:57,972 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:58,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:58,172 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:58,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:58,173 INFO L82 PathProgramCache]: Analyzing trace with hash -376478069, now seen corresponding path program 69 times [2021-06-05 22:59:58,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:58,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377563413] [2021-06-05 22:59:58,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:58,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:58,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:58,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377563413] [2021-06-05 22:59:58,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377563413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:58,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766044815] [2021-06-05 22:59:58,279 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:58,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:59:58,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:58,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:59:58,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:58,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:58,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766044815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:58,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:58,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:59:58,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681935383] [2021-06-05 22:59:58,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:59:58,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:58,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:59:58,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:59:58,834 INFO L87 Difference]: Start difference. First operand 77279 states and 281270 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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) [2021-06-05 22:59:59,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:59,507 INFO L93 Difference]: Finished difference Result 78113 states and 283706 transitions. [2021-06-05 22:59:59,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:59:59,507 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 25 [2021-06-05 22:59:59,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:59,709 INFO L225 Difference]: With dead ends: 78113 [2021-06-05 22:59:59,709 INFO L226 Difference]: Without dead ends: 78039 [2021-06-05 22:59:59,709 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 261.3ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:59:59,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78039 states. [2021-06-05 23:00:01,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78039 to 77471. [2021-06-05 23:00:01,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77471 states, 77470 states have (on average 3.638763392280883) internal successors, (281895), 77470 states have internal predecessors, (281895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77471 states to 77471 states and 281895 transitions. [2021-06-05 23:00:01,402 INFO L78 Accepts]: Start accepts. Automaton has 77471 states and 281895 transitions. Word has length 25 [2021-06-05 23:00:01,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:01,402 INFO L482 AbstractCegarLoop]: Abstraction has 77471 states and 281895 transitions. [2021-06-05 23:00:01,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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) [2021-06-05 23:00:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 77471 states and 281895 transitions. [2021-06-05 23:00:01,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:01,872 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:01,872 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:02,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:02,105 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:02,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:02,105 INFO L82 PathProgramCache]: Analyzing trace with hash -181794737, now seen corresponding path program 70 times [2021-06-05 23:00:02,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:02,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092682728] [2021-06-05 23:00:02,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:02,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:02,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092682728] [2021-06-05 23:00:02,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092682728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:02,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004623218] [2021-06-05 23:00:02,202 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:02,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:00:02,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:02,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:00:02,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:02,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:02,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004623218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:02,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:02,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 23:00:02,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127037330] [2021-06-05 23:00:02,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:00:02,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:02,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:00:02,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:00:02,340 INFO L87 Difference]: Start difference. First operand 77471 states and 281895 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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) [2021-06-05 23:00:03,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:03,016 INFO L93 Difference]: Finished difference Result 77694 states and 282349 transitions. [2021-06-05 23:00:03,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:00:03,017 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 25 [2021-06-05 23:00:03,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:03,220 INFO L225 Difference]: With dead ends: 77694 [2021-06-05 23:00:03,221 INFO L226 Difference]: Without dead ends: 77515 [2021-06-05 23:00:03,221 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 215.4ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:00:03,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77515 states. [2021-06-05 23:00:04,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77515 to 77439. [2021-06-05 23:00:05,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77439 states, 77438 states have (on average 3.6384075001937033) internal successors, (281751), 77438 states have internal predecessors, (281751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:05,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77439 states to 77439 states and 281751 transitions. [2021-06-05 23:00:05,246 INFO L78 Accepts]: Start accepts. Automaton has 77439 states and 281751 transitions. Word has length 25 [2021-06-05 23:00:05,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:05,246 INFO L482 AbstractCegarLoop]: Abstraction has 77439 states and 281751 transitions. [2021-06-05 23:00:05,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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) [2021-06-05 23:00:05,246 INFO L276 IsEmpty]: Start isEmpty. Operand 77439 states and 281751 transitions. [2021-06-05 23:00:05,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:05,716 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:05,716 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:05,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:05,916 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:05,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:05,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1465003531, now seen corresponding path program 71 times [2021-06-05 23:00:05,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:05,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752305930] [2021-06-05 23:00:05,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:05,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:05,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:05,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752305930] [2021-06-05 23:00:05,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752305930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:05,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042200283] [2021-06-05 23:00:05,991 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:06,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:00:06,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:06,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:00:06,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:06,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:06,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042200283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:06,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:06,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 23:00:06,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037699036] [2021-06-05 23:00:06,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:00:06,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:06,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:00:06,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:00:06,145 INFO L87 Difference]: Start difference. First operand 77439 states and 281751 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:07,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:07,075 INFO L93 Difference]: Finished difference Result 79339 states and 287695 transitions. [2021-06-05 23:00:07,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:00:07,076 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:00:07,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:07,293 INFO L225 Difference]: With dead ends: 79339 [2021-06-05 23:00:07,293 INFO L226 Difference]: Without dead ends: 79274 [2021-06-05 23:00:07,293 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 325.9ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:00:07,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79274 states. [2021-06-05 23:00:08,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79274 to 77568. [2021-06-05 23:00:08,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77568 states, 77567 states have (on average 3.638802583572911) internal successors, (282251), 77567 states have internal predecessors, (282251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:09,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77568 states to 77568 states and 282251 transitions. [2021-06-05 23:00:09,540 INFO L78 Accepts]: Start accepts. Automaton has 77568 states and 282251 transitions. Word has length 25 [2021-06-05 23:00:09,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:09,540 INFO L482 AbstractCegarLoop]: Abstraction has 77568 states and 282251 transitions. [2021-06-05 23:00:09,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:09,540 INFO L276 IsEmpty]: Start isEmpty. Operand 77568 states and 282251 transitions. [2021-06-05 23:00:09,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:09,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:09,649 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:09,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:09,850 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:09,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:09,850 INFO L82 PathProgramCache]: Analyzing trace with hash 53335819, now seen corresponding path program 72 times [2021-06-05 23:00:09,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:09,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875989454] [2021-06-05 23:00:09,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:09,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:09,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:09,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875989454] [2021-06-05 23:00:09,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875989454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:09,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326053737] [2021-06-05 23:00:09,951 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:09,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:00:09,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:09,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:00:09,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:10,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326053737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:10,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:10,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 23:00:10,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280841368] [2021-06-05 23:00:10,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:00:10,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:10,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:00:10,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:00:10,107 INFO L87 Difference]: Start difference. First operand 77568 states and 282251 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:10,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:10,798 INFO L93 Difference]: Finished difference Result 94772 states and 343263 transitions. [2021-06-05 23:00:10,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:00:10,798 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:00:10,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:11,041 INFO L225 Difference]: With dead ends: 94772 [2021-06-05 23:00:11,041 INFO L226 Difference]: Without dead ends: 94731 [2021-06-05 23:00:11,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 252.8ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:00:11,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94731 states. [2021-06-05 23:00:13,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94731 to 77763. [2021-06-05 23:00:13,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77763 states, 77762 states have (on average 3.638486664437643) internal successors, (282936), 77762 states have internal predecessors, (282936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:13,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77763 states to 77763 states and 282936 transitions. [2021-06-05 23:00:13,362 INFO L78 Accepts]: Start accepts. Automaton has 77763 states and 282936 transitions. Word has length 25 [2021-06-05 23:00:13,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:13,362 INFO L482 AbstractCegarLoop]: Abstraction has 77763 states and 282936 transitions. [2021-06-05 23:00:13,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:13,362 INFO L276 IsEmpty]: Start isEmpty. Operand 77763 states and 282936 transitions. [2021-06-05 23:00:13,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:13,480 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:13,480 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:13,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 23:00:13,682 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:13,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:13,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1031893263, now seen corresponding path program 73 times [2021-06-05 23:00:13,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:13,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555153051] [2021-06-05 23:00:13,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:13,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:13,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:13,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555153051] [2021-06-05 23:00:13,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555153051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:13,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245311559] [2021-06-05 23:00:13,802 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:13,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:13,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:00:13,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:13,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245311559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:13,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:13,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:00:13,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639906081] [2021-06-05 23:00:13,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:00:13,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:13,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:00:13,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:00:13,965 INFO L87 Difference]: Start difference. First operand 77763 states and 282936 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:15,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:15,237 INFO L93 Difference]: Finished difference Result 94989 states and 343844 transitions. [2021-06-05 23:00:15,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:00:15,238 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:00:15,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:15,551 INFO L225 Difference]: With dead ends: 94989 [2021-06-05 23:00:15,552 INFO L226 Difference]: Without dead ends: 94948 [2021-06-05 23:00:15,552 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 359.6ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:00:15,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94948 states. [2021-06-05 23:00:17,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94948 to 77792. [2021-06-05 23:00:17,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77792 states, 77791 states have (on average 3.638647144271188) internal successors, (283054), 77791 states have internal predecessors, (283054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:17,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77792 states to 77792 states and 283054 transitions. [2021-06-05 23:00:17,385 INFO L78 Accepts]: Start accepts. Automaton has 77792 states and 283054 transitions. Word has length 25 [2021-06-05 23:00:17,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:17,385 INFO L482 AbstractCegarLoop]: Abstraction has 77792 states and 283054 transitions. [2021-06-05 23:00:17,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:17,385 INFO L276 IsEmpty]: Start isEmpty. Operand 77792 states and 283054 transitions. [2021-06-05 23:00:17,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:17,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:17,507 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:17,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:17,707 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:17,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:17,707 INFO L82 PathProgramCache]: Analyzing trace with hash 232853259, now seen corresponding path program 74 times [2021-06-05 23:00:17,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:17,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982306087] [2021-06-05 23:00:17,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:17,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:17,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982306087] [2021-06-05 23:00:17,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982306087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:17,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755705556] [2021-06-05 23:00:17,818 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:17,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:00:17,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:17,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:00:17,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:18,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755705556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:18,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:18,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 23:00:18,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163660385] [2021-06-05 23:00:18,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:00:18,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:18,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:00:18,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:00:18,013 INFO L87 Difference]: Start difference. First operand 77792 states and 283054 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-06-05 23:00:19,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:19,783 INFO L93 Difference]: Finished difference Result 89830 states and 327389 transitions. [2021-06-05 23:00:19,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:00:19,783 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-06-05 23:00:19,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:20,029 INFO L225 Difference]: With dead ends: 89830 [2021-06-05 23:00:20,030 INFO L226 Difference]: Without dead ends: 89585 [2021-06-05 23:00:20,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 722.0ms TimeCoverageRelationStatistics Valid=384, Invalid=1422, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:00:20,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89585 states. [2021-06-05 23:00:21,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89585 to 77799. [2021-06-05 23:00:21,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77799 states, 77798 states have (on average 3.638962441193861) internal successors, (283104), 77798 states have internal predecessors, (283104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:22,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77799 states to 77799 states and 283104 transitions. [2021-06-05 23:00:22,076 INFO L78 Accepts]: Start accepts. Automaton has 77799 states and 283104 transitions. Word has length 25 [2021-06-05 23:00:22,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:22,076 INFO L482 AbstractCegarLoop]: Abstraction has 77799 states and 283104 transitions. [2021-06-05 23:00:22,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-06-05 23:00:22,076 INFO L276 IsEmpty]: Start isEmpty. Operand 77799 states and 283104 transitions. [2021-06-05 23:00:22,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:22,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:22,610 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:22,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:22,825 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:22,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:22,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1883882647, now seen corresponding path program 75 times [2021-06-05 23:00:22,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:22,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380674628] [2021-06-05 23:00:22,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:22,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:22,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380674628] [2021-06-05 23:00:22,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380674628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:22,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541523852] [2021-06-05 23:00:22,917 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:22,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:00:22,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:22,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:00:22,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:23,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541523852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:23,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:23,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 23:00:23,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941206878] [2021-06-05 23:00:23,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:00:23,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:23,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:00:23,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:00:23,114 INFO L87 Difference]: Start difference. First operand 77799 states and 283104 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:23,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:23,913 INFO L93 Difference]: Finished difference Result 94982 states and 344217 transitions. [2021-06-05 23:00:23,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:00:23,913 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:00:23,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:24,160 INFO L225 Difference]: With dead ends: 94982 [2021-06-05 23:00:24,161 INFO L226 Difference]: Without dead ends: 94949 [2021-06-05 23:00:24,161 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 324.8ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:00:24,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94949 states. [2021-06-05 23:00:26,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94949 to 77835. [2021-06-05 23:00:26,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77835 states, 77834 states have (on average 3.639579104247501) internal successors, (283283), 77834 states have internal predecessors, (283283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:26,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77835 states to 77835 states and 283283 transitions. [2021-06-05 23:00:26,367 INFO L78 Accepts]: Start accepts. Automaton has 77835 states and 283283 transitions. Word has length 25 [2021-06-05 23:00:26,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:26,367 INFO L482 AbstractCegarLoop]: Abstraction has 77835 states and 283283 transitions. [2021-06-05 23:00:26,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:26,367 INFO L276 IsEmpty]: Start isEmpty. Operand 77835 states and 283283 transitions. [2021-06-05 23:00:26,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:26,474 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:26,474 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:26,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:26,675 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:26,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:26,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1432527205, now seen corresponding path program 76 times [2021-06-05 23:00:26,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:26,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985490256] [2021-06-05 23:00:26,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:26,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:26,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:26,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985490256] [2021-06-05 23:00:26,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985490256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:26,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750055649] [2021-06-05 23:00:26,782 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:26,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:00:26,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:26,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:00:26,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:26,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750055649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:26,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:26,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 23:00:26,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973947402] [2021-06-05 23:00:26,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:00:26,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:26,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:00:26,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:00:26,957 INFO L87 Difference]: Start difference. First operand 77835 states and 283283 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:27,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:27,796 INFO L93 Difference]: Finished difference Result 95030 states and 344348 transitions. [2021-06-05 23:00:27,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:00:27,797 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:00:27,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:28,454 INFO L225 Difference]: With dead ends: 95030 [2021-06-05 23:00:28,454 INFO L226 Difference]: Without dead ends: 95001 [2021-06-05 23:00:28,454 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 380.2ms TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:00:28,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95001 states. [2021-06-05 23:00:29,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95001 to 77848. [2021-06-05 23:00:30,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77848 states, 77847 states have (on average 3.6396136010379334) internal successors, (283333), 77847 states have internal predecessors, (283333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:30,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77848 states to 77848 states and 283333 transitions. [2021-06-05 23:00:30,278 INFO L78 Accepts]: Start accepts. Automaton has 77848 states and 283333 transitions. Word has length 25 [2021-06-05 23:00:30,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:30,278 INFO L482 AbstractCegarLoop]: Abstraction has 77848 states and 283333 transitions. [2021-06-05 23:00:30,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:30,278 INFO L276 IsEmpty]: Start isEmpty. Operand 77848 states and 283333 transitions. [2021-06-05 23:00:30,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:30,384 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:30,384 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:30,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:30,586 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:30,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:30,587 INFO L82 PathProgramCache]: Analyzing trace with hash 2063400087, now seen corresponding path program 77 times [2021-06-05 23:00:30,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:30,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446882911] [2021-06-05 23:00:30,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:30,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:30,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446882911] [2021-06-05 23:00:30,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446882911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:30,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841345744] [2021-06-05 23:00:30,677 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:30,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:00:30,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:30,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:00:30,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:30,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:30,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841345744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:30,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:30,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:00:30,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211238369] [2021-06-05 23:00:30,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:00:30,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:30,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:00:30,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:00:30,863 INFO L87 Difference]: Start difference. First operand 77848 states and 283333 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) [2021-06-05 23:00:32,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:32,393 INFO L93 Difference]: Finished difference Result 88722 states and 324271 transitions. [2021-06-05 23:00:32,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:00:32,394 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 25 [2021-06-05 23:00:32,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:32,636 INFO L225 Difference]: With dead ends: 88722 [2021-06-05 23:00:32,636 INFO L226 Difference]: Without dead ends: 88697 [2021-06-05 23:00:32,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 634.1ms TimeCoverageRelationStatistics Valid=353, Invalid=1053, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:00:32,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88697 states. [2021-06-05 23:00:34,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88697 to 77835. [2021-06-05 23:00:34,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77835 states, 77834 states have (on average 3.639591952103194) internal successors, (283284), 77834 states have internal predecessors, (283284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:34,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77835 states to 77835 states and 283284 transitions. [2021-06-05 23:00:34,487 INFO L78 Accepts]: Start accepts. Automaton has 77835 states and 283284 transitions. Word has length 25 [2021-06-05 23:00:34,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:34,488 INFO L482 AbstractCegarLoop]: Abstraction has 77835 states and 283284 transitions. [2021-06-05 23:00:34,488 INFO L483 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) [2021-06-05 23:00:34,488 INFO L276 IsEmpty]: Start isEmpty. Operand 77835 states and 283284 transitions. [2021-06-05 23:00:34,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:34,596 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:34,597 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:34,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:34,801 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:34,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:34,801 INFO L82 PathProgramCache]: Analyzing trace with hash 781968495, now seen corresponding path program 78 times [2021-06-05 23:00:34,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:34,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64615620] [2021-06-05 23:00:34,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:34,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:34,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:34,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64615620] [2021-06-05 23:00:34,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64615620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:34,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240066765] [2021-06-05 23:00:34,903 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:34,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:00:34,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:34,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:00:34,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:35,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240066765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:35,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:35,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 23:00:35,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412801669] [2021-06-05 23:00:35,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:00:35,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:35,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:00:35,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:00:35,085 INFO L87 Difference]: Start difference. First operand 77835 states and 283284 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:35,898 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-06-05 23:00:36,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:36,403 INFO L93 Difference]: Finished difference Result 94397 states and 342391 transitions. [2021-06-05 23:00:36,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:00:36,404 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:00:36,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:36,683 INFO L225 Difference]: With dead ends: 94397 [2021-06-05 23:00:36,683 INFO L226 Difference]: Without dead ends: 94360 [2021-06-05 23:00:36,683 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 878.6ms TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:00:36,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94360 states. [2021-06-05 23:00:38,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94360 to 77898. [2021-06-05 23:00:38,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77898 states, 77897 states have (on average 3.6398449234245223) internal successors, (283533), 77897 states have internal predecessors, (283533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:38,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77898 states to 77898 states and 283533 transitions. [2021-06-05 23:00:38,629 INFO L78 Accepts]: Start accepts. Automaton has 77898 states and 283533 transitions. Word has length 25 [2021-06-05 23:00:38,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:38,629 INFO L482 AbstractCegarLoop]: Abstraction has 77898 states and 283533 transitions. [2021-06-05 23:00:38,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:38,629 INFO L276 IsEmpty]: Start isEmpty. Operand 77898 states and 283533 transitions. [2021-06-05 23:00:39,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:39,185 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:39,185 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:39,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:39,401 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:39,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:39,401 INFO L82 PathProgramCache]: Analyzing trace with hash -17071509, now seen corresponding path program 79 times [2021-06-05 23:00:39,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:39,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637133404] [2021-06-05 23:00:39,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:39,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:39,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637133404] [2021-06-05 23:00:39,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637133404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:39,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043612343] [2021-06-05 23:00:39,499 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:39,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:00:39,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:39,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043612343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:39,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:39,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:00:39,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593358647] [2021-06-05 23:00:39,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:00:39,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:39,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:00:39,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:00:39,715 INFO L87 Difference]: Start difference. First operand 77898 states and 283533 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) [2021-06-05 23:00:40,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:40,989 INFO L93 Difference]: Finished difference Result 106020 states and 385942 transitions. [2021-06-05 23:00:40,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:00:40,990 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 25 [2021-06-05 23:00:40,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:41,296 INFO L225 Difference]: With dead ends: 106020 [2021-06-05 23:00:41,296 INFO L226 Difference]: Without dead ends: 105968 [2021-06-05 23:00:41,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 731.4ms TimeCoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:00:41,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105968 states. [2021-06-05 23:00:43,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105968 to 77888. [2021-06-05 23:00:43,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77888 states, 77887 states have (on average 3.639901395611591) internal successors, (283501), 77887 states have internal predecessors, (283501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:43,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77888 states to 77888 states and 283501 transitions. [2021-06-05 23:00:43,596 INFO L78 Accepts]: Start accepts. Automaton has 77888 states and 283501 transitions. Word has length 25 [2021-06-05 23:00:43,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:43,596 INFO L482 AbstractCegarLoop]: Abstraction has 77888 states and 283501 transitions. [2021-06-05 23:00:43,596 INFO L483 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) [2021-06-05 23:00:43,596 INFO L276 IsEmpty]: Start isEmpty. Operand 77888 states and 283501 transitions. [2021-06-05 23:00:43,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:43,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:43,733 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:43,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 23:00:43,937 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:43,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:43,937 INFO L82 PathProgramCache]: Analyzing trace with hash -98470565, now seen corresponding path program 80 times [2021-06-05 23:00:43,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:43,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846418447] [2021-06-05 23:00:43,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:44,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:44,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:44,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846418447] [2021-06-05 23:00:44,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846418447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:44,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977075722] [2021-06-05 23:00:44,015 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:44,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:00:44,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:44,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:00:44,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:44,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977075722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:44,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:44,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:00:44,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573243392] [2021-06-05 23:00:44,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:00:44,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:44,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:00:44,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:00:44,227 INFO L87 Difference]: Start difference. First operand 77888 states and 283501 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) [2021-06-05 23:00:45,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:45,813 INFO L93 Difference]: Finished difference Result 96396 states and 348721 transitions. [2021-06-05 23:00:45,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:00:45,814 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 25 [2021-06-05 23:00:45,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:46,103 INFO L225 Difference]: With dead ends: 96396 [2021-06-05 23:00:46,104 INFO L226 Difference]: Without dead ends: 96342 [2021-06-05 23:00:46,104 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 591.3ms TimeCoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:00:46,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96342 states. [2021-06-05 23:00:47,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96342 to 77888. [2021-06-05 23:00:47,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77888 states, 77887 states have (on average 3.6401581778730727) internal successors, (283521), 77887 states have internal predecessors, (283521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:48,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77888 states to 77888 states and 283521 transitions. [2021-06-05 23:00:48,080 INFO L78 Accepts]: Start accepts. Automaton has 77888 states and 283521 transitions. Word has length 25 [2021-06-05 23:00:48,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:48,080 INFO L482 AbstractCegarLoop]: Abstraction has 77888 states and 283521 transitions. [2021-06-05 23:00:48,080 INFO L483 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) [2021-06-05 23:00:48,080 INFO L276 IsEmpty]: Start isEmpty. Operand 77888 states and 283521 transitions. [2021-06-05 23:00:48,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:48,199 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:48,199 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:48,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:48,401 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:48,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:48,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1506823447, now seen corresponding path program 81 times [2021-06-05 23:00:48,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:48,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972491215] [2021-06-05 23:00:48,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:48,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:48,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972491215] [2021-06-05 23:00:48,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972491215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:48,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904212538] [2021-06-05 23:00:48,502 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:48,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:00:48,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:48,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:00:48,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:48,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:48,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904212538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:48,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:48,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 23:00:48,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748661654] [2021-06-05 23:00:48,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:00:48,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:48,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:00:48,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:00:48,686 INFO L87 Difference]: Start difference. First operand 77888 states and 283521 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:49,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:49,713 INFO L93 Difference]: Finished difference Result 85565 states and 309594 transitions. [2021-06-05 23:00:49,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:00:49,714 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:00:49,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:49,938 INFO L225 Difference]: With dead ends: 85565 [2021-06-05 23:00:49,939 INFO L226 Difference]: Without dead ends: 85370 [2021-06-05 23:00:49,939 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:00:50,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85370 states. [2021-06-05 23:00:51,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85370 to 78997. [2021-06-05 23:00:51,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78997 states, 78996 states have (on average 3.6391083092814824) internal successors, (287475), 78996 states have internal predecessors, (287475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:51,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78997 states to 78997 states and 287475 transitions. [2021-06-05 23:00:51,780 INFO L78 Accepts]: Start accepts. Automaton has 78997 states and 287475 transitions. Word has length 25 [2021-06-05 23:00:51,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:51,780 INFO L482 AbstractCegarLoop]: Abstraction has 78997 states and 287475 transitions. [2021-06-05 23:00:51,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:51,781 INFO L276 IsEmpty]: Start isEmpty. Operand 78997 states and 287475 transitions. [2021-06-05 23:00:52,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:52,382 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:52,383 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:52,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-06-05 23:00:52,583 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:52,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:52,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1345964487, now seen corresponding path program 82 times [2021-06-05 23:00:52,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:52,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504100626] [2021-06-05 23:00:52,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:52,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:52,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504100626] [2021-06-05 23:00:52,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504100626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:52,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93319497] [2021-06-05 23:00:52,673 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:52,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:00:52,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:52,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:00:52,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:52,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:52,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93319497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:52,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:52,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 23:00:52,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240402243] [2021-06-05 23:00:52,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:00:52,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:52,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:00:52,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:00:52,830 INFO L87 Difference]: Start difference. First operand 78997 states and 287475 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-06-05 23:00:53,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:53,476 INFO L93 Difference]: Finished difference Result 79701 states and 289399 transitions. [2021-06-05 23:00:53,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:00:53,476 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 25 [2021-06-05 23:00:53,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:53,751 INFO L225 Difference]: With dead ends: 79701 [2021-06-05 23:00:53,751 INFO L226 Difference]: Without dead ends: 79594 [2021-06-05 23:00:53,751 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:00:53,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79594 states. [2021-06-05 23:00:55,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79594 to 79080. [2021-06-05 23:00:55,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79080 states, 79079 states have (on average 3.634719710669078) internal successors, (287430), 79079 states have internal predecessors, (287430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:55,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79080 states to 79080 states and 287430 transitions. [2021-06-05 23:00:55,500 INFO L78 Accepts]: Start accepts. Automaton has 79080 states and 287430 transitions. Word has length 25 [2021-06-05 23:00:55,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:55,501 INFO L482 AbstractCegarLoop]: Abstraction has 79080 states and 287430 transitions. [2021-06-05 23:00:55,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-06-05 23:00:55,501 INFO L276 IsEmpty]: Start isEmpty. Operand 79080 states and 287430 transitions. [2021-06-05 23:00:56,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:00:56,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:56,005 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:56,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 23:00:56,228 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:56,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:56,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1425295639, now seen corresponding path program 83 times [2021-06-05 23:00:56,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:56,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398125296] [2021-06-05 23:00:56,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:56,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:56,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398125296] [2021-06-05 23:00:56,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398125296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:56,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954570815] [2021-06-05 23:00:56,292 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:56,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:00:56,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:56,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:00:56,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:56,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:56,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954570815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:56,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:56,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 23:00:56,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026060038] [2021-06-05 23:00:56,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:00:56,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:56,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:00:56,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:00:56,460 INFO L87 Difference]: Start difference. First operand 79080 states and 287430 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:57,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:57,743 INFO L93 Difference]: Finished difference Result 93002 states and 336576 transitions. [2021-06-05 23:00:57,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:00:57,744 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:00:57,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:58,026 INFO L225 Difference]: With dead ends: 93002 [2021-06-05 23:00:58,026 INFO L226 Difference]: Without dead ends: 92906 [2021-06-05 23:00:58,028 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 576.3ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:00:58,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92906 states. [2021-06-05 23:00:59,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92906 to 82584. [2021-06-05 23:00:59,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82584 states, 82583 states have (on average 3.6524829565406924) internal successors, (301633), 82583 states have internal predecessors, (301633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:00,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82584 states to 82584 states and 301633 transitions. [2021-06-05 23:01:00,238 INFO L78 Accepts]: Start accepts. Automaton has 82584 states and 301633 transitions. Word has length 25 [2021-06-05 23:01:00,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:00,239 INFO L482 AbstractCegarLoop]: Abstraction has 82584 states and 301633 transitions. [2021-06-05 23:01:00,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:00,239 INFO L276 IsEmpty]: Start isEmpty. Operand 82584 states and 301633 transitions. [2021-06-05 23:01:00,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:01:00,368 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:00,368 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:00,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 23:01:00,569 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:00,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:00,569 INFO L82 PathProgramCache]: Analyzing trace with hash 13627927, now seen corresponding path program 84 times [2021-06-05 23:01:00,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:00,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999626924] [2021-06-05 23:01:00,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:00,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:00,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999626924] [2021-06-05 23:01:00,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999626924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:00,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715389586] [2021-06-05 23:01:00,677 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:00,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 23:01:00,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:00,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:01:00,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:00,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715389586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:00,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:00,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 23:01:00,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72338570] [2021-06-05 23:01:00,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:01:00,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:00,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:01:00,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:01:00,848 INFO L87 Difference]: Start difference. First operand 82584 states and 301633 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:02,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:02,137 INFO L93 Difference]: Finished difference Result 101778 states and 369627 transitions. [2021-06-05 23:01:02,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:01:02,137 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:01:02,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:02,453 INFO L225 Difference]: With dead ends: 101778 [2021-06-05 23:01:02,454 INFO L226 Difference]: Without dead ends: 101745 [2021-06-05 23:01:02,454 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 400.9ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:01:02,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101745 states. [2021-06-05 23:01:03,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101745 to 82622. [2021-06-05 23:01:04,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82622 states, 82621 states have (on average 3.6528485494002734) internal successors, (301802), 82621 states have internal predecessors, (301802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:04,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82622 states to 82622 states and 301802 transitions. [2021-06-05 23:01:04,312 INFO L78 Accepts]: Start accepts. Automaton has 82622 states and 301802 transitions. Word has length 25 [2021-06-05 23:01:04,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:04,312 INFO L482 AbstractCegarLoop]: Abstraction has 82622 states and 301802 transitions. [2021-06-05 23:01:04,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:04,312 INFO L276 IsEmpty]: Start isEmpty. Operand 82622 states and 301802 transitions. [2021-06-05 23:01:04,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:01:04,424 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:04,424 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:04,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:04,632 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:04,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:04,633 INFO L82 PathProgramCache]: Analyzing trace with hash 992185371, now seen corresponding path program 85 times [2021-06-05 23:01:04,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:04,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046731959] [2021-06-05 23:01:04,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:04,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:04,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046731959] [2021-06-05 23:01:04,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046731959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:04,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230245494] [2021-06-05 23:01:04,735 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:04,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:01:04,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:04,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230245494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:04,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:04,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:01:04,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320718417] [2021-06-05 23:01:04,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:01:04,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:04,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:01:04,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:01:04,924 INFO L87 Difference]: Start difference. First operand 82622 states and 301802 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:05,637 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 9 [2021-06-05 23:01:06,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:06,291 INFO L93 Difference]: Finished difference Result 103177 states and 374373 transitions. [2021-06-05 23:01:06,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:01:06,291 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:01:06,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:06,600 INFO L225 Difference]: With dead ends: 103177 [2021-06-05 23:01:06,600 INFO L226 Difference]: Without dead ends: 103066 [2021-06-05 23:01:06,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 804.3ms TimeCoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:01:06,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103066 states. [2021-06-05 23:01:08,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103066 to 82700. [2021-06-05 23:01:08,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82700 states, 82699 states have (on average 3.653224343704277) internal successors, (302118), 82699 states have internal predecessors, (302118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:09,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82700 states to 82700 states and 302118 transitions. [2021-06-05 23:01:09,185 INFO L78 Accepts]: Start accepts. Automaton has 82700 states and 302118 transitions. Word has length 25 [2021-06-05 23:01:09,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:09,185 INFO L482 AbstractCegarLoop]: Abstraction has 82700 states and 302118 transitions. [2021-06-05 23:01:09,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:09,185 INFO L276 IsEmpty]: Start isEmpty. Operand 82700 states and 302118 transitions. [2021-06-05 23:01:09,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:01:09,326 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:09,326 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:09,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 23:01:09,529 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:09,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:09,529 INFO L82 PathProgramCache]: Analyzing trace with hash 193145367, now seen corresponding path program 86 times [2021-06-05 23:01:09,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:09,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794823386] [2021-06-05 23:01:09,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:09,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:09,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794823386] [2021-06-05 23:01:09,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794823386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:09,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524509980] [2021-06-05 23:01:09,632 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:09,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:01:09,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:09,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:01:09,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:09,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524509980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:09,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:09,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 23:01:09,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457140831] [2021-06-05 23:01:09,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:01:09,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:09,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:01:09,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:01:09,828 INFO L87 Difference]: Start difference. First operand 82700 states and 302118 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-06-05 23:01:10,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:10,790 INFO L93 Difference]: Finished difference Result 96794 states and 354161 transitions. [2021-06-05 23:01:10,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:01:10,791 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-06-05 23:01:10,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:11,055 INFO L225 Difference]: With dead ends: 96794 [2021-06-05 23:01:11,055 INFO L226 Difference]: Without dead ends: 96755 [2021-06-05 23:01:11,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 482.1ms TimeCoverageRelationStatistics Valid=269, Invalid=853, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:01:11,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96755 states. [2021-06-05 23:01:12,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96755 to 82707. [2021-06-05 23:01:13,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82707 states, 82706 states have (on average 3.6533987860614707) internal successors, (302158), 82706 states have internal predecessors, (302158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:13,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82707 states to 82707 states and 302158 transitions. [2021-06-05 23:01:13,258 INFO L78 Accepts]: Start accepts. Automaton has 82707 states and 302158 transitions. Word has length 25 [2021-06-05 23:01:13,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:13,258 INFO L482 AbstractCegarLoop]: Abstraction has 82707 states and 302158 transitions. [2021-06-05 23:01:13,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-06-05 23:01:13,259 INFO L276 IsEmpty]: Start isEmpty. Operand 82707 states and 302158 transitions. [2021-06-05 23:01:13,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:01:13,375 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:13,375 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:13,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 23:01:13,575 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:13,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:13,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1088286225, now seen corresponding path program 87 times [2021-06-05 23:01:13,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:13,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292639808] [2021-06-05 23:01:13,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:13,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:13,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:13,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292639808] [2021-06-05 23:01:13,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292639808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:13,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918104648] [2021-06-05 23:01:13,674 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:13,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 23:01:13,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:13,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:01:13,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:13,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918104648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:13,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:13,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:01:13,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064341119] [2021-06-05 23:01:13,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:01:13,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:13,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:01:13,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:01:13,843 INFO L87 Difference]: Start difference. First operand 82707 states and 302158 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:15,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:15,410 INFO L93 Difference]: Finished difference Result 101984 states and 370229 transitions. [2021-06-05 23:01:15,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:01:15,411 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:01:15,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:15,722 INFO L225 Difference]: With dead ends: 101984 [2021-06-05 23:01:15,722 INFO L226 Difference]: Without dead ends: 101951 [2021-06-05 23:01:15,723 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 532.6ms TimeCoverageRelationStatistics Valid=236, Invalid=820, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:01:15,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101951 states. [2021-06-05 23:01:17,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101951 to 82749. [2021-06-05 23:01:17,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82749 states, 82748 states have (on average 3.6533209261855273) internal successors, (302305), 82748 states have internal predecessors, (302305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:17,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82749 states to 82749 states and 302305 transitions. [2021-06-05 23:01:17,802 INFO L78 Accepts]: Start accepts. Automaton has 82749 states and 302305 transitions. Word has length 25 [2021-06-05 23:01:17,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:17,802 INFO L482 AbstractCegarLoop]: Abstraction has 82749 states and 302305 transitions. [2021-06-05 23:01:17,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:17,802 INFO L276 IsEmpty]: Start isEmpty. Operand 82749 states and 302305 transitions. [2021-06-05 23:01:18,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:01:18,457 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:18,457 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:18,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:18,681 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:18,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:18,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1887326229, now seen corresponding path program 88 times [2021-06-05 23:01:18,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:18,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015416888] [2021-06-05 23:01:18,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:18,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:18,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:18,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015416888] [2021-06-05 23:01:18,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015416888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:18,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97996968] [2021-06-05 23:01:18,783 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:18,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:01:18,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:18,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:01:18,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:18,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97996968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:18,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:18,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 23:01:18,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600699656] [2021-06-05 23:01:18,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:01:18,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:18,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:01:18,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:01:18,957 INFO L87 Difference]: Start difference. First operand 82749 states and 302305 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-06-05 23:01:20,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:20,101 INFO L93 Difference]: Finished difference Result 115207 states and 419837 transitions. [2021-06-05 23:01:20,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:01:20,101 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-06-05 23:01:20,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:20,432 INFO L225 Difference]: With dead ends: 115207 [2021-06-05 23:01:20,432 INFO L226 Difference]: Without dead ends: 115157 [2021-06-05 23:01:20,433 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 516.1ms TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:01:20,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115157 states. [2021-06-05 23:01:22,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115157 to 82759. [2021-06-05 23:01:22,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82759 states, 82758 states have (on average 3.653821986998236) internal successors, (302383), 82758 states have internal predecessors, (302383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:22,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82759 states to 82759 states and 302383 transitions. [2021-06-05 23:01:22,843 INFO L78 Accepts]: Start accepts. Automaton has 82759 states and 302383 transitions. Word has length 25 [2021-06-05 23:01:22,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:22,843 INFO L482 AbstractCegarLoop]: Abstraction has 82759 states and 302383 transitions. [2021-06-05 23:01:22,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-06-05 23:01:22,843 INFO L276 IsEmpty]: Start isEmpty. Operand 82759 states and 302383 transitions. [2021-06-05 23:01:22,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:01:22,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:22,961 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:23,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 23:01:23,162 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:23,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:23,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1968725285, now seen corresponding path program 89 times [2021-06-05 23:01:23,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:23,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364856271] [2021-06-05 23:01:23,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:23,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:23,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:23,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364856271] [2021-06-05 23:01:23,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364856271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:23,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55167233] [2021-06-05 23:01:23,239 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:23,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:01:23,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:23,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:01:23,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:23,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55167233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:23,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:23,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 23:01:23,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649303574] [2021-06-05 23:01:23,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:01:23,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:23,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:01:23,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:01:23,416 INFO L87 Difference]: Start difference. First operand 82759 states and 302383 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-06-05 23:01:24,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:24,940 INFO L93 Difference]: Finished difference Result 101895 states and 369939 transitions. [2021-06-05 23:01:24,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:01:24,940 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-06-05 23:01:24,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:25,239 INFO L225 Difference]: With dead ends: 101895 [2021-06-05 23:01:25,240 INFO L226 Difference]: Without dead ends: 101841 [2021-06-05 23:01:25,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 534.5ms TimeCoverageRelationStatistics Valid=335, Invalid=1147, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:01:25,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101841 states. [2021-06-05 23:01:26,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101841 to 82803. [2021-06-05 23:01:27,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82803 states, 82802 states have (on average 3.6542112509359677) internal successors, (302576), 82802 states have internal predecessors, (302576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:27,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82803 states to 82803 states and 302576 transitions. [2021-06-05 23:01:27,262 INFO L78 Accepts]: Start accepts. Automaton has 82803 states and 302576 transitions. Word has length 25 [2021-06-05 23:01:27,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:27,262 INFO L482 AbstractCegarLoop]: Abstraction has 82803 states and 302576 transitions. [2021-06-05 23:01:27,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-06-05 23:01:27,263 INFO L276 IsEmpty]: Start isEmpty. Operand 82803 states and 302576 transitions. [2021-06-05 23:01:27,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:01:27,382 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:27,382 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:27,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-06-05 23:01:27,582 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:27,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:27,583 INFO L82 PathProgramCache]: Analyzing trace with hash 118188467, now seen corresponding path program 90 times [2021-06-05 23:01:27,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:27,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572078921] [2021-06-05 23:01:27,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:28,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:28,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572078921] [2021-06-05 23:01:28,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572078921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:28,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189439922] [2021-06-05 23:01:28,153 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:28,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:01:28,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:28,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:01:28,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:28,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189439922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:28,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:28,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:01:28,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758270459] [2021-06-05 23:01:28,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:01:28,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:28,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:01:28,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:01:28,390 INFO L87 Difference]: Start difference. First operand 82803 states and 302576 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:29,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:29,408 INFO L93 Difference]: Finished difference Result 100879 states and 366869 transitions. [2021-06-05 23:01:29,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:01:29,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:01:29,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:29,698 INFO L225 Difference]: With dead ends: 100879 [2021-06-05 23:01:29,698 INFO L226 Difference]: Without dead ends: 100846 [2021-06-05 23:01:29,699 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 992.9ms TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:01:29,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100846 states. [2021-06-05 23:01:31,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100846 to 82884. [2021-06-05 23:01:31,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82884 states, 82883 states have (on average 3.6542958145820013) internal successors, (302879), 82883 states have internal predecessors, (302879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:32,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82884 states to 82884 states and 302879 transitions. [2021-06-05 23:01:32,024 INFO L78 Accepts]: Start accepts. Automaton has 82884 states and 302879 transitions. Word has length 25 [2021-06-05 23:01:32,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:32,024 INFO L482 AbstractCegarLoop]: Abstraction has 82884 states and 302879 transitions. [2021-06-05 23:01:32,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:32,024 INFO L276 IsEmpty]: Start isEmpty. Operand 82884 states and 302879 transitions. [2021-06-05 23:01:32,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:01:32,143 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:32,143 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:32,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:32,344 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:32,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:32,344 INFO L82 PathProgramCache]: Analyzing trace with hash -680851537, now seen corresponding path program 91 times [2021-06-05 23:01:32,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:32,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969354470] [2021-06-05 23:01:32,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:32,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:32,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969354470] [2021-06-05 23:01:32,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969354470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:32,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277193558] [2021-06-05 23:01:32,446 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:32,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:01:32,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:32,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277193558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:32,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:32,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 23:01:32,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900482345] [2021-06-05 23:01:32,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:01:32,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:32,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:01:32,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:01:32,669 INFO L87 Difference]: Start difference. First operand 82884 states and 302879 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-06-05 23:01:34,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:34,195 INFO L93 Difference]: Finished difference Result 114377 states and 417122 transitions. [2021-06-05 23:01:34,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:01:34,195 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-06-05 23:01:34,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:34,509 INFO L225 Difference]: With dead ends: 114377 [2021-06-05 23:01:34,509 INFO L226 Difference]: Without dead ends: 114327 [2021-06-05 23:01:34,509 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 588.0ms TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:01:34,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114327 states. [2021-06-05 23:01:36,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114327 to 82862. [2021-06-05 23:01:36,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82862 states, 82861 states have (on average 3.6543609176814185) internal successors, (302804), 82861 states have internal predecessors, (302804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:36,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82862 states to 82862 states and 302804 transitions. [2021-06-05 23:01:36,601 INFO L78 Accepts]: Start accepts. Automaton has 82862 states and 302804 transitions. Word has length 25 [2021-06-05 23:01:36,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:36,601 INFO L482 AbstractCegarLoop]: Abstraction has 82862 states and 302804 transitions. [2021-06-05 23:01:36,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-06-05 23:01:36,601 INFO L276 IsEmpty]: Start isEmpty. Operand 82862 states and 302804 transitions. [2021-06-05 23:01:37,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:01:37,221 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:37,221 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:37,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 23:01:37,457 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:37,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:37,457 INFO L82 PathProgramCache]: Analyzing trace with hash -762250593, now seen corresponding path program 92 times [2021-06-05 23:01:37,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:37,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4846008] [2021-06-05 23:01:37,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:37,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:37,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:37,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4846008] [2021-06-05 23:01:37,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4846008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:37,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953503174] [2021-06-05 23:01:37,550 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:37,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:01:37,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:37,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:01:37,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:37,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953503174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:37,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:37,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 23:01:37,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129615483] [2021-06-05 23:01:37,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:01:37,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:37,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:01:37,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:01:37,734 INFO L87 Difference]: Start difference. First operand 82862 states and 302804 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-06-05 23:01:38,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:38,622 INFO L93 Difference]: Finished difference Result 104310 states and 378454 transitions. [2021-06-05 23:01:38,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:01:38,622 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-06-05 23:01:38,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:38,928 INFO L225 Difference]: With dead ends: 104310 [2021-06-05 23:01:38,928 INFO L226 Difference]: Without dead ends: 104256 [2021-06-05 23:01:38,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 424.4ms TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:01:39,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104256 states. [2021-06-05 23:01:40,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104256 to 82924. [2021-06-05 23:01:41,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82924 states, 82923 states have (on average 3.6555599773283647) internal successors, (303130), 82923 states have internal predecessors, (303130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:41,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82924 states to 82924 states and 303130 transitions. [2021-06-05 23:01:41,327 INFO L78 Accepts]: Start accepts. Automaton has 82924 states and 303130 transitions. Word has length 25 [2021-06-05 23:01:41,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:41,328 INFO L482 AbstractCegarLoop]: Abstraction has 82924 states and 303130 transitions. [2021-06-05 23:01:41,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-06-05 23:01:41,328 INFO L276 IsEmpty]: Start isEmpty. Operand 82924 states and 303130 transitions. [2021-06-05 23:01:41,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:01:41,448 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:41,448 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:41,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 23:01:41,648 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:41,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:41,649 INFO L82 PathProgramCache]: Analyzing trace with hash -348634661, now seen corresponding path program 93 times [2021-06-05 23:01:41,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:41,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198221135] [2021-06-05 23:01:41,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:41,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:41,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198221135] [2021-06-05 23:01:41,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198221135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:41,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556939628] [2021-06-05 23:01:41,739 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:41,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:01:41,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:41,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:01:41,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:41,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556939628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:41,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:41,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 23:01:41,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727446145] [2021-06-05 23:01:41,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:01:41,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:41,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:01:41,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:01:41,933 INFO L87 Difference]: Start difference. First operand 82924 states and 303130 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-06-05 23:01:43,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:43,508 INFO L93 Difference]: Finished difference Result 104844 states and 380478 transitions. [2021-06-05 23:01:43,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:01:43,508 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-06-05 23:01:43,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:43,807 INFO L225 Difference]: With dead ends: 104844 [2021-06-05 23:01:43,807 INFO L226 Difference]: Without dead ends: 104794 [2021-06-05 23:01:43,807 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 574.0ms TimeCoverageRelationStatistics Valid=310, Invalid=1172, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:01:43,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104794 states. [2021-06-05 23:01:45,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104794 to 82938. [2021-06-05 23:01:45,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82938 states, 82937 states have (on average 3.656293331082629) internal successors, (303242), 82937 states have internal predecessors, (303242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:45,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82938 states to 82938 states and 303242 transitions. [2021-06-05 23:01:45,864 INFO L78 Accepts]: Start accepts. Automaton has 82938 states and 303242 transitions. Word has length 25 [2021-06-05 23:01:45,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:45,864 INFO L482 AbstractCegarLoop]: Abstraction has 82938 states and 303242 transitions. [2021-06-05 23:01:45,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-06-05 23:01:45,865 INFO L276 IsEmpty]: Start isEmpty. Operand 82938 states and 303242 transitions. [2021-06-05 23:01:45,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:01:45,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:45,984 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:46,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:46,185 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:46,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:46,185 INFO L82 PathProgramCache]: Analyzing trace with hash -540119201, now seen corresponding path program 94 times [2021-06-05 23:01:46,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:46,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694545817] [2021-06-05 23:01:46,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:46,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:46,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694545817] [2021-06-05 23:01:46,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694545817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:46,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789796562] [2021-06-05 23:01:46,717 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:46,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:01:46,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:46,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:01:46,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:46,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789796562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:46,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:46,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 23:01:46,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104753751] [2021-06-05 23:01:46,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:01:46,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:46,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:01:46,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:01:46,926 INFO L87 Difference]: Start difference. First operand 82938 states and 303242 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:47,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:47,577 INFO L93 Difference]: Finished difference Result 83638 states and 305189 transitions. [2021-06-05 23:01:47,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:01:47,577 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:01:47,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:47,812 INFO L225 Difference]: With dead ends: 83638 [2021-06-05 23:01:47,812 INFO L226 Difference]: Without dead ends: 83581 [2021-06-05 23:01:47,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 645.5ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:01:47,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83581 states. [2021-06-05 23:01:49,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83581 to 83002. [2021-06-05 23:01:49,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83002 states, 83001 states have (on average 3.6559680003855375) internal successors, (303449), 83001 states have internal predecessors, (303449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:50,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83002 states to 83002 states and 303449 transitions. [2021-06-05 23:01:50,083 INFO L78 Accepts]: Start accepts. Automaton has 83002 states and 303449 transitions. Word has length 25 [2021-06-05 23:01:50,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:50,083 INFO L482 AbstractCegarLoop]: Abstraction has 83002 states and 303449 transitions. [2021-06-05 23:01:50,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:50,083 INFO L276 IsEmpty]: Start isEmpty. Operand 83002 states and 303449 transitions. [2021-06-05 23:01:50,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:01:50,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:50,213 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:50,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 23:01:50,413 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:50,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:50,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1951786913, now seen corresponding path program 95 times [2021-06-05 23:01:50,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:50,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65385155] [2021-06-05 23:01:50,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:50,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:50,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:50,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:50,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65385155] [2021-06-05 23:01:50,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65385155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:50,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349037104] [2021-06-05 23:01:50,499 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:50,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:01:50,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:50,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:01:50,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:50,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:50,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349037104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:50,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:50,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 23:01:50,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093534109] [2021-06-05 23:01:50,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:01:50,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:50,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:01:50,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:01:50,646 INFO L87 Difference]: Start difference. First operand 83002 states and 303449 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:51,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:51,296 INFO L93 Difference]: Finished difference Result 101871 states and 370301 transitions. [2021-06-05 23:01:51,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:01:51,296 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:01:51,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:51,570 INFO L225 Difference]: With dead ends: 101871 [2021-06-05 23:01:51,570 INFO L226 Difference]: Without dead ends: 101820 [2021-06-05 23:01:51,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 219.3ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:01:51,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101820 states. [2021-06-05 23:01:53,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101820 to 83375. [2021-06-05 23:01:53,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83375 states, 83374 states have (on average 3.6553122076426705) internal successors, (304758), 83374 states have internal predecessors, (304758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:53,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83375 states to 83375 states and 304758 transitions. [2021-06-05 23:01:53,793 INFO L78 Accepts]: Start accepts. Automaton has 83375 states and 304758 transitions. Word has length 25 [2021-06-05 23:01:53,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:53,794 INFO L482 AbstractCegarLoop]: Abstraction has 83375 states and 304758 transitions. [2021-06-05 23:01:53,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:53,794 INFO L276 IsEmpty]: Start isEmpty. Operand 83375 states and 304758 transitions. [2021-06-05 23:01:53,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:01:53,908 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:53,908 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:54,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-06-05 23:01:54,109 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:54,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:54,109 INFO L82 PathProgramCache]: Analyzing trace with hash -973229469, now seen corresponding path program 96 times [2021-06-05 23:01:54,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:54,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669804185] [2021-06-05 23:01:54,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:54,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:54,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669804185] [2021-06-05 23:01:54,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669804185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:54,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081066342] [2021-06-05 23:01:54,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:54,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:01:54,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:54,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:01:54,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:54,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081066342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:54,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:54,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 23:01:54,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344479863] [2021-06-05 23:01:54,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:01:54,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:54,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:01:54,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:01:54,413 INFO L87 Difference]: Start difference. First operand 83375 states and 304758 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:55,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:55,710 INFO L93 Difference]: Finished difference Result 118493 states and 424280 transitions. [2021-06-05 23:01:55,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:01:55,710 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:01:55,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:56,028 INFO L225 Difference]: With dead ends: 118493 [2021-06-05 23:01:56,028 INFO L226 Difference]: Without dead ends: 118321 [2021-06-05 23:01:56,028 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 312.0ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:01:56,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118321 states. [2021-06-05 23:01:57,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118321 to 83375. [2021-06-05 23:01:57,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83375 states, 83374 states have (on average 3.6537769568450598) internal successors, (304630), 83374 states have internal predecessors, (304630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:58,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83375 states to 83375 states and 304630 transitions. [2021-06-05 23:01:58,044 INFO L78 Accepts]: Start accepts. Automaton has 83375 states and 304630 transitions. Word has length 25 [2021-06-05 23:01:58,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:58,044 INFO L482 AbstractCegarLoop]: Abstraction has 83375 states and 304630 transitions. [2021-06-05 23:01:58,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:58,044 INFO L276 IsEmpty]: Start isEmpty. Operand 83375 states and 304630 transitions. [2021-06-05 23:01:58,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:01:58,644 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:58,644 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:58,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:58,867 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:58,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:58,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1772269473, now seen corresponding path program 97 times [2021-06-05 23:01:58,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:58,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483371779] [2021-06-05 23:01:58,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:58,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:58,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483371779] [2021-06-05 23:01:58,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483371779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:58,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604770147] [2021-06-05 23:01:58,977 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:58,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:58,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:01:58,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:59,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604770147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:59,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:59,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:01:59,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003208068] [2021-06-05 23:01:59,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:01:59,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:59,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:01:59,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:01:59,157 INFO L87 Difference]: Start difference. First operand 83375 states and 304630 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) [2021-06-05 23:02:00,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:00,537 INFO L93 Difference]: Finished difference Result 107765 states and 385439 transitions. [2021-06-05 23:02:00,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:02:00,543 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 25 [2021-06-05 23:02:00,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:00,827 INFO L225 Difference]: With dead ends: 107765 [2021-06-05 23:02:00,827 INFO L226 Difference]: Without dead ends: 107423 [2021-06-05 23:02:00,828 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 688.2ms TimeCoverageRelationStatistics Valid=428, Invalid=1294, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:02:01,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107423 states. [2021-06-05 23:02:03,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107423 to 83439. [2021-06-05 23:02:03,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83439 states, 83438 states have (on average 3.6545938301493326) internal successors, (304932), 83438 states have internal predecessors, (304932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:03,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83439 states to 83439 states and 304932 transitions. [2021-06-05 23:02:03,449 INFO L78 Accepts]: Start accepts. Automaton has 83439 states and 304932 transitions. Word has length 25 [2021-06-05 23:02:03,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:03,450 INFO L482 AbstractCegarLoop]: Abstraction has 83439 states and 304932 transitions. [2021-06-05 23:02:03,450 INFO L483 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) [2021-06-05 23:02:03,450 INFO L276 IsEmpty]: Start isEmpty. Operand 83439 states and 304932 transitions. [2021-06-05 23:02:03,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:02:03,572 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:03,572 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:03,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 23:02:03,777 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:03,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:03,777 INFO L82 PathProgramCache]: Analyzing trace with hash -305853537, now seen corresponding path program 98 times [2021-06-05 23:02:03,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:03,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847737924] [2021-06-05 23:02:03,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:03,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:03,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:03,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847737924] [2021-06-05 23:02:03,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847737924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:03,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835195064] [2021-06-05 23:02:03,843 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:03,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:02:03,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:03,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:02:03,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:03,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:03,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835195064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:03,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:03,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 23:02:03,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482283916] [2021-06-05 23:02:03,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 23:02:03,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:03,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 23:02:03,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:02:03,966 INFO L87 Difference]: Start difference. First operand 83439 states and 304932 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:04,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:04,455 INFO L93 Difference]: Finished difference Result 85157 states and 310455 transitions. [2021-06-05 23:02:04,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:02:04,455 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:02:04,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:05,206 INFO L225 Difference]: With dead ends: 85157 [2021-06-05 23:02:05,206 INFO L226 Difference]: Without dead ends: 85092 [2021-06-05 23:02:05,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 140.1ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:02:05,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85092 states. [2021-06-05 23:02:06,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85092 to 84734. [2021-06-05 23:02:06,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84734 states, 84733 states have (on average 3.650643786954315) internal successors, (309330), 84733 states have internal predecessors, (309330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:07,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84734 states to 84734 states and 309330 transitions. [2021-06-05 23:02:07,026 INFO L78 Accepts]: Start accepts. Automaton has 84734 states and 309330 transitions. Word has length 25 [2021-06-05 23:02:07,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:07,026 INFO L482 AbstractCegarLoop]: Abstraction has 84734 states and 309330 transitions. [2021-06-05 23:02:07,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:07,026 INFO L276 IsEmpty]: Start isEmpty. Operand 84734 states and 309330 transitions. [2021-06-05 23:02:07,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:02:07,154 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:07,154 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:07,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-06-05 23:02:07,354 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:07,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:07,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1461906909, now seen corresponding path program 99 times [2021-06-05 23:02:07,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:07,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468557086] [2021-06-05 23:02:07,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:07,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:07,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468557086] [2021-06-05 23:02:07,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468557086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:07,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360391432] [2021-06-05 23:02:07,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:07,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:02:07,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:07,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:02:07,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:07,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360391432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:07,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:07,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-06-05 23:02:07,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764276078] [2021-06-05 23:02:07,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:02:07,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:07,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:02:07,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:02:07,585 INFO L87 Difference]: Start difference. First operand 84734 states and 309330 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:08,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:08,762 INFO L93 Difference]: Finished difference Result 87116 states and 316831 transitions. [2021-06-05 23:02:08,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:02:08,762 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:02:08,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:09,023 INFO L225 Difference]: With dead ends: 87116 [2021-06-05 23:02:09,023 INFO L226 Difference]: Without dead ends: 86937 [2021-06-05 23:02:09,024 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 268.4ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:02:09,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86937 states. [2021-06-05 23:02:10,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86937 to 84105. [2021-06-05 23:02:10,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84105 states, 84104 states have (on average 3.6505279178160372) internal successors, (307024), 84104 states have internal predecessors, (307024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:10,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84105 states to 84105 states and 307024 transitions. [2021-06-05 23:02:10,880 INFO L78 Accepts]: Start accepts. Automaton has 84105 states and 307024 transitions. Word has length 25 [2021-06-05 23:02:10,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:10,880 INFO L482 AbstractCegarLoop]: Abstraction has 84105 states and 307024 transitions. [2021-06-05 23:02:10,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:10,880 INFO L276 IsEmpty]: Start isEmpty. Operand 84105 states and 307024 transitions. [2021-06-05 23:02:10,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:02:10,998 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:10,998 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:11,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:11,198 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:11,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:11,198 INFO L82 PathProgramCache]: Analyzing trace with hash -426128515, now seen corresponding path program 100 times [2021-06-05 23:02:11,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:11,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685558521] [2021-06-05 23:02:11,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:11,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:11,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:11,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685558521] [2021-06-05 23:02:11,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685558521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:11,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422954196] [2021-06-05 23:02:11,296 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:11,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:02:11,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:11,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:02:11,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:11,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422954196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:11,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:11,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 23:02:11,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199677768] [2021-06-05 23:02:11,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:02:11,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:11,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:02:11,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:02:11,447 INFO L87 Difference]: Start difference. First operand 84105 states and 307024 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:12,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:12,419 INFO L93 Difference]: Finished difference Result 84705 states and 308613 transitions. [2021-06-05 23:02:12,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:02:12,420 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:02:12,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:12,632 INFO L225 Difference]: With dead ends: 84705 [2021-06-05 23:02:12,633 INFO L226 Difference]: Without dead ends: 84664 [2021-06-05 23:02:12,633 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 218.1ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:02:12,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84664 states. [2021-06-05 23:02:14,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84664 to 84321. [2021-06-05 23:02:14,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84321 states, 84320 states have (on average 3.6487073055028465) internal successors, (307659), 84320 states have internal predecessors, (307659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:14,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84321 states to 84321 states and 307659 transitions. [2021-06-05 23:02:14,429 INFO L78 Accepts]: Start accepts. Automaton has 84321 states and 307659 transitions. Word has length 25 [2021-06-05 23:02:14,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:14,429 INFO L482 AbstractCegarLoop]: Abstraction has 84321 states and 307659 transitions. [2021-06-05 23:02:14,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:14,430 INFO L276 IsEmpty]: Start isEmpty. Operand 84321 states and 307659 transitions. [2021-06-05 23:02:14,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:02:14,550 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:14,550 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:14,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:14,750 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:14,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:14,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1484388057, now seen corresponding path program 101 times [2021-06-05 23:02:14,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:14,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416127760] [2021-06-05 23:02:14,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:14,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:14,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:14,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416127760] [2021-06-05 23:02:14,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416127760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:14,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567086930] [2021-06-05 23:02:14,853 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:14,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:02:14,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:14,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:02:14,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:15,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567086930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:15,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:15,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 23:02:15,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786697867] [2021-06-05 23:02:15,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:02:15,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:15,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:02:15,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:02:15,440 INFO L87 Difference]: Start difference. First operand 84321 states and 307659 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:15,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:15,991 INFO L93 Difference]: Finished difference Result 84472 states and 308027 transitions. [2021-06-05 23:02:15,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:02:15,991 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:02:15,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:16,205 INFO L225 Difference]: With dead ends: 84472 [2021-06-05 23:02:16,205 INFO L226 Difference]: Without dead ends: 84409 [2021-06-05 23:02:16,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 258.3ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:02:16,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84409 states. [2021-06-05 23:02:17,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84409 to 84320. [2021-06-05 23:02:17,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84320 states, 84319 states have (on average 3.6487031392687297) internal successors, (307655), 84319 states have internal predecessors, (307655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:18,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84320 states to 84320 states and 307655 transitions. [2021-06-05 23:02:18,413 INFO L78 Accepts]: Start accepts. Automaton has 84320 states and 307655 transitions. Word has length 25 [2021-06-05 23:02:18,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:18,413 INFO L482 AbstractCegarLoop]: Abstraction has 84320 states and 307655 transitions. [2021-06-05 23:02:18,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:18,413 INFO L276 IsEmpty]: Start isEmpty. Operand 84320 states and 307655 transitions. [2021-06-05 23:02:18,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:02:18,563 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:18,564 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:18,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:18,787 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:18,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:18,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1814796211, now seen corresponding path program 102 times [2021-06-05 23:02:18,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:18,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734902328] [2021-06-05 23:02:18,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:18,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:18,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:18,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734902328] [2021-06-05 23:02:18,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734902328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:18,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035133240] [2021-06-05 23:02:18,880 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:18,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:02:18,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:18,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:02:18,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:19,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:19,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035133240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:19,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:19,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 23:02:19,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401643854] [2021-06-05 23:02:19,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:02:19,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:19,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:02:19,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:02:19,036 INFO L87 Difference]: Start difference. First operand 84320 states and 307655 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:19,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:19,766 INFO L93 Difference]: Finished difference Result 102467 states and 372249 transitions. [2021-06-05 23:02:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:02:19,766 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:02:19,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:20,048 INFO L225 Difference]: With dead ends: 102467 [2021-06-05 23:02:20,048 INFO L226 Difference]: Without dead ends: 102393 [2021-06-05 23:02:20,048 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 260.1ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:02:20,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102393 states. [2021-06-05 23:02:21,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102393 to 84329. [2021-06-05 23:02:22,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84329 states, 84328 states have (on average 3.648728773361161) internal successors, (307690), 84328 states have internal predecessors, (307690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:22,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84329 states to 84329 states and 307690 transitions. [2021-06-05 23:02:22,292 INFO L78 Accepts]: Start accepts. Automaton has 84329 states and 307690 transitions. Word has length 25 [2021-06-05 23:02:22,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:22,292 INFO L482 AbstractCegarLoop]: Abstraction has 84329 states and 307690 transitions. [2021-06-05 23:02:22,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:22,292 INFO L276 IsEmpty]: Start isEmpty. Operand 84329 states and 307690 transitions. [2021-06-05 23:02:22,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:02:22,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:22,408 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:22,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:22,608 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:22,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:22,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1015756207, now seen corresponding path program 103 times [2021-06-05 23:02:22,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:22,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787239085] [2021-06-05 23:02:22,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:22,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:22,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787239085] [2021-06-05 23:02:22,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787239085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:22,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809845430] [2021-06-05 23:02:22,698 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:22,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:22,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:02:22,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:22,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809845430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:22,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:22,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 23:02:22,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908981434] [2021-06-05 23:02:22,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:02:22,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:22,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:02:22,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:02:22,907 INFO L87 Difference]: Start difference. First operand 84329 states and 307690 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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) [2021-06-05 23:02:24,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:24,258 INFO L93 Difference]: Finished difference Result 114923 states and 419277 transitions. [2021-06-05 23:02:24,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:02:24,259 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 25 [2021-06-05 23:02:24,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:24,583 INFO L225 Difference]: With dead ends: 114923 [2021-06-05 23:02:24,583 INFO L226 Difference]: Without dead ends: 114877 [2021-06-05 23:02:24,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 404.9ms TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:02:24,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114877 states. [2021-06-05 23:02:26,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114877 to 84322. [2021-06-05 23:02:26,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84322 states, 84321 states have (on average 3.6487233310800393) internal successors, (307664), 84321 states have internal predecessors, (307664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:26,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84322 states to 84322 states and 307664 transitions. [2021-06-05 23:02:26,648 INFO L78 Accepts]: Start accepts. Automaton has 84322 states and 307664 transitions. Word has length 25 [2021-06-05 23:02:26,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:26,648 INFO L482 AbstractCegarLoop]: Abstraction has 84322 states and 307664 transitions. [2021-06-05 23:02:26,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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) [2021-06-05 23:02:26,648 INFO L276 IsEmpty]: Start isEmpty. Operand 84322 states and 307664 transitions. [2021-06-05 23:02:27,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:02:27,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:27,218 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:27,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 23:02:27,433 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:27,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:27,433 INFO L82 PathProgramCache]: Analyzing trace with hash 777388195, now seen corresponding path program 104 times [2021-06-05 23:02:27,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:27,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040947867] [2021-06-05 23:02:27,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:27,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:27,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:27,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040947867] [2021-06-05 23:02:27,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040947867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:27,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980899257] [2021-06-05 23:02:27,527 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:27,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:02:27,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:27,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:02:27,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:27,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980899257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:27,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:27,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 23:02:27,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013714322] [2021-06-05 23:02:27,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:02:27,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:27,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:02:27,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:02:27,655 INFO L87 Difference]: Start difference. First operand 84322 states and 307664 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:28,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:28,212 INFO L93 Difference]: Finished difference Result 84652 states and 308467 transitions. [2021-06-05 23:02:28,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:02:28,213 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:02:28,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:28,456 INFO L225 Difference]: With dead ends: 84652 [2021-06-05 23:02:28,456 INFO L226 Difference]: Without dead ends: 84561 [2021-06-05 23:02:28,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 181.0ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:02:28,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84561 states. [2021-06-05 23:02:30,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84561 to 84306. [2021-06-05 23:02:30,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84306 states, 84305 states have (on average 3.647316292034873) internal successors, (307487), 84305 states have internal predecessors, (307487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:30,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84306 states to 84306 states and 307487 transitions. [2021-06-05 23:02:30,776 INFO L78 Accepts]: Start accepts. Automaton has 84306 states and 307487 transitions. Word has length 25 [2021-06-05 23:02:30,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:30,776 INFO L482 AbstractCegarLoop]: Abstraction has 84306 states and 307487 transitions. [2021-06-05 23:02:30,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:30,776 INFO L276 IsEmpty]: Start isEmpty. Operand 84306 states and 307487 transitions. [2021-06-05 23:02:30,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:02:30,891 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:30,891 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:31,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:31,092 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:31,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:31,092 INFO L82 PathProgramCache]: Analyzing trace with hash 664777499, now seen corresponding path program 105 times [2021-06-05 23:02:31,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:31,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985728922] [2021-06-05 23:02:31,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:31,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:31,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:31,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:31,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985728922] [2021-06-05 23:02:31,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985728922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:31,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773338398] [2021-06-05 23:02:31,187 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:31,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:02:31,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:31,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:02:31,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:02:31,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773338398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:31,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:31,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 23:02:31,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827575213] [2021-06-05 23:02:31,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 23:02:31,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:31,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 23:02:31,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:02:31,315 INFO L87 Difference]: Start difference. First operand 84306 states and 307487 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:31,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:31,961 INFO L93 Difference]: Finished difference Result 103449 states and 375574 transitions. [2021-06-05 23:02:31,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:02:31,961 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:02:31,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:32,240 INFO L225 Difference]: With dead ends: 103449 [2021-06-05 23:02:32,240 INFO L226 Difference]: Without dead ends: 103317 [2021-06-05 23:02:32,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 212.8ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:02:32,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103317 states. [2021-06-05 23:02:34,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103317 to 85017. [2021-06-05 23:02:34,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85017 states, 85016 states have (on average 3.644808036134375) internal successors, (309867), 85016 states have internal predecessors, (309867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:34,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85017 states to 85017 states and 309867 transitions. [2021-06-05 23:02:34,488 INFO L78 Accepts]: Start accepts. Automaton has 85017 states and 309867 transitions. Word has length 25 [2021-06-05 23:02:34,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:34,488 INFO L482 AbstractCegarLoop]: Abstraction has 85017 states and 309867 transitions. [2021-06-05 23:02:34,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:34,488 INFO L276 IsEmpty]: Start isEmpty. Operand 85017 states and 309867 transitions. [2021-06-05 23:02:34,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:02:34,617 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:34,617 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:34,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:34,817 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:34,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:34,817 INFO L82 PathProgramCache]: Analyzing trace with hash -134262505, now seen corresponding path program 106 times [2021-06-05 23:02:34,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:34,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104756558] [2021-06-05 23:02:34,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:34,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:34,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:34,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104756558] [2021-06-05 23:02:34,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104756558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:34,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907709174] [2021-06-05 23:02:34,911 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:34,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:02:34,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:34,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:02:34,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:02:35,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907709174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:35,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:35,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 23:02:35,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749519309] [2021-06-05 23:02:35,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:02:35,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:35,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:02:35,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:02:35,051 INFO L87 Difference]: Start difference. First operand 85017 states and 309867 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) [2021-06-05 23:02:36,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:36,364 INFO L93 Difference]: Finished difference Result 116231 states and 423805 transitions. [2021-06-05 23:02:36,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:02:36,365 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 25 [2021-06-05 23:02:36,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:36,690 INFO L225 Difference]: With dead ends: 116231 [2021-06-05 23:02:36,690 INFO L226 Difference]: Without dead ends: 116185 [2021-06-05 23:02:36,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 342.6ms TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:02:36,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116185 states. [2021-06-05 23:02:38,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116185 to 85004. [2021-06-05 23:02:38,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85004 states, 85003 states have (on average 3.644706657412091) internal successors, (309811), 85003 states have internal predecessors, (309811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:38,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85004 states to 85004 states and 309811 transitions. [2021-06-05 23:02:38,747 INFO L78 Accepts]: Start accepts. Automaton has 85004 states and 309811 transitions. Word has length 25 [2021-06-05 23:02:38,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:38,747 INFO L482 AbstractCegarLoop]: Abstraction has 85004 states and 309811 transitions. [2021-06-05 23:02:38,747 INFO L483 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) [2021-06-05 23:02:38,747 INFO L276 IsEmpty]: Start isEmpty. Operand 85004 states and 309811 transitions. [2021-06-05 23:02:39,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:02:39,320 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:39,320 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:39,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-05 23:02:39,543 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:39,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:39,543 INFO L82 PathProgramCache]: Analyzing trace with hash -394386371, now seen corresponding path program 107 times [2021-06-05 23:02:39,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:39,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996643223] [2021-06-05 23:02:39,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:39,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:39,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996643223] [2021-06-05 23:02:39,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996643223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:39,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488684482] [2021-06-05 23:02:39,634 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:39,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:02:39,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:39,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:02:39,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:02:39,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488684482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:39,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:39,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 23:02:39,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951802215] [2021-06-05 23:02:39,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:02:39,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:39,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:02:39,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:02:39,740 INFO L87 Difference]: Start difference. First operand 85004 states and 309811 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:40,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:40,268 INFO L93 Difference]: Finished difference Result 85225 states and 310318 transitions. [2021-06-05 23:02:40,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:02:40,268 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:02:40,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:40,484 INFO L225 Difference]: With dead ends: 85225 [2021-06-05 23:02:40,485 INFO L226 Difference]: Without dead ends: 85188 [2021-06-05 23:02:40,485 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:02:40,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85188 states. [2021-06-05 23:02:42,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85188 to 84839. [2021-06-05 23:02:42,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84839 states, 84838 states have (on average 3.645795516160211) internal successors, (309302), 84838 states have internal predecessors, (309302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:42,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84839 states to 84839 states and 309302 transitions. [2021-06-05 23:02:42,799 INFO L78 Accepts]: Start accepts. Automaton has 84839 states and 309302 transitions. Word has length 25 [2021-06-05 23:02:42,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:42,799 INFO L482 AbstractCegarLoop]: Abstraction has 84839 states and 309302 transitions. [2021-06-05 23:02:42,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:42,799 INFO L276 IsEmpty]: Start isEmpty. Operand 84839 states and 309302 transitions. [2021-06-05 23:02:42,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:02:42,920 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:42,920 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:43,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:43,121 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:43,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:43,121 INFO L82 PathProgramCache]: Analyzing trace with hash -372630517, now seen corresponding path program 108 times [2021-06-05 23:02:43,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:43,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846533362] [2021-06-05 23:02:43,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:43,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:43,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:43,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846533362] [2021-06-05 23:02:43,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846533362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:43,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168374884] [2021-06-05 23:02:43,218 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:43,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:02:43,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:43,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:02:43,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:43,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:02:43,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168374884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:43,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:43,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 23:02:43,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413572264] [2021-06-05 23:02:43,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:02:43,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:43,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:02:43,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:02:43,322 INFO L87 Difference]: Start difference. First operand 84839 states and 309302 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:43,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:43,803 INFO L93 Difference]: Finished difference Result 84942 states and 309502 transitions. [2021-06-05 23:02:43,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:02:43,803 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:02:43,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:44,040 INFO L225 Difference]: With dead ends: 84942 [2021-06-05 23:02:44,040 INFO L226 Difference]: Without dead ends: 84847 [2021-06-05 23:02:44,040 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:02:44,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84847 states. [2021-06-05 23:02:45,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84847 to 84780. [2021-06-05 23:02:46,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84780 states, 84779 states have (on average 3.643850481841022) internal successors, (308922), 84779 states have internal predecessors, (308922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:46,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84780 states to 84780 states and 308922 transitions. [2021-06-05 23:02:46,322 INFO L78 Accepts]: Start accepts. Automaton has 84780 states and 308922 transitions. Word has length 25 [2021-06-05 23:02:46,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:46,323 INFO L482 AbstractCegarLoop]: Abstraction has 84780 states and 308922 transitions. [2021-06-05 23:02:46,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:46,323 INFO L276 IsEmpty]: Start isEmpty. Operand 84780 states and 308922 transitions. [2021-06-05 23:02:46,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:02:46,443 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:46,443 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:46,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:46,643 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:46,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:46,644 INFO L82 PathProgramCache]: Analyzing trace with hash 445651607, now seen corresponding path program 109 times [2021-06-05 23:02:46,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:46,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586757556] [2021-06-05 23:02:46,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:46,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:46,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:46,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586757556] [2021-06-05 23:02:46,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586757556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:46,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645957082] [2021-06-05 23:02:46,726 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:46,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:02:46,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:46,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:46,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645957082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:46,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:46,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:02:46,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419796504] [2021-06-05 23:02:46,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:02:46,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:46,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:02:46,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:02:46,900 INFO L87 Difference]: Start difference. First operand 84780 states and 308922 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) [2021-06-05 23:02:47,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:47,668 INFO L93 Difference]: Finished difference Result 98741 states and 357653 transitions. [2021-06-05 23:02:47,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:02:47,669 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 25 [2021-06-05 23:02:47,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:48,424 INFO L225 Difference]: With dead ends: 98741 [2021-06-05 23:02:48,424 INFO L226 Difference]: Without dead ends: 98669 [2021-06-05 23:02:48,424 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 304.5ms TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:02:48,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98669 states. [2021-06-05 23:02:49,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98669 to 86019. [2021-06-05 23:02:49,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86019 states, 86018 states have (on average 3.643783859192262) internal successors, (313431), 86018 states have internal predecessors, (313431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:50,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86019 states to 86019 states and 313431 transitions. [2021-06-05 23:02:50,190 INFO L78 Accepts]: Start accepts. Automaton has 86019 states and 313431 transitions. Word has length 25 [2021-06-05 23:02:50,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:50,190 INFO L482 AbstractCegarLoop]: Abstraction has 86019 states and 313431 transitions. [2021-06-05 23:02:50,190 INFO L483 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) [2021-06-05 23:02:50,190 INFO L276 IsEmpty]: Start isEmpty. Operand 86019 states and 313431 transitions. [2021-06-05 23:02:50,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:02:50,314 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:50,314 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:50,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:50,515 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:50,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:50,515 INFO L82 PathProgramCache]: Analyzing trace with hash -743631491, now seen corresponding path program 110 times [2021-06-05 23:02:50,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:50,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134969121] [2021-06-05 23:02:50,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:50,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:50,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134969121] [2021-06-05 23:02:50,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134969121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:50,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573735969] [2021-06-05 23:02:50,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:50,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:02:50,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:50,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:02:50,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:50,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573735969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:50,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:50,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 23:02:50,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735743511] [2021-06-05 23:02:50,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 23:02:50,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:50,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 23:02:50,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:02:50,703 INFO L87 Difference]: Start difference. First operand 86019 states and 313431 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:51,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:51,782 INFO L93 Difference]: Finished difference Result 86639 states and 315121 transitions. [2021-06-05 23:02:51,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:02:51,783 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:02:51,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:52,038 INFO L225 Difference]: With dead ends: 86639 [2021-06-05 23:02:52,038 INFO L226 Difference]: Without dead ends: 86578 [2021-06-05 23:02:52,038 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:02:52,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86578 states. [2021-06-05 23:02:53,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86578 to 86023. [2021-06-05 23:02:53,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86023 states, 86022 states have (on average 3.6426960544976867) internal successors, (313352), 86022 states have internal predecessors, (313352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:53,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86023 states to 86023 states and 313352 transitions. [2021-06-05 23:02:53,884 INFO L78 Accepts]: Start accepts. Automaton has 86023 states and 313352 transitions. Word has length 25 [2021-06-05 23:02:53,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:53,885 INFO L482 AbstractCegarLoop]: Abstraction has 86023 states and 313352 transitions. [2021-06-05 23:02:53,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:53,885 INFO L276 IsEmpty]: Start isEmpty. Operand 86023 states and 313352 transitions. [2021-06-05 23:02:54,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:02:54,012 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:54,012 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:54,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 23:02:54,212 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:54,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:54,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1565279795, now seen corresponding path program 25 times [2021-06-05 23:02:54,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:54,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770332352] [2021-06-05 23:02:54,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:54,247 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:54,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:54,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770332352] [2021-06-05 23:02:54,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770332352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:54,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644492481] [2021-06-05 23:02:54,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:54,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 23:02:54,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:54,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644492481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:54,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:54,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:02:54,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4247169] [2021-06-05 23:02:54,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:02:54,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:54,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:02:54,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:02:54,335 INFO L87 Difference]: Start difference. First operand 86023 states and 313352 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-06-05 23:02:55,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:55,736 INFO L93 Difference]: Finished difference Result 182520 states and 664068 transitions. [2021-06-05 23:02:55,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:02:55,736 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 25 [2021-06-05 23:02:55,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:56,251 INFO L225 Difference]: With dead ends: 182520 [2021-06-05 23:02:56,251 INFO L226 Difference]: Without dead ends: 182506 [2021-06-05 23:02:56,251 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:02:56,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182506 states. [2021-06-05 23:02:59,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182506 to 178615. [2021-06-05 23:03:00,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178615 states, 178614 states have (on average 3.650077821447367) internal successors, (651955), 178614 states have internal predecessors, (651955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:00,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178615 states to 178615 states and 651955 transitions. [2021-06-05 23:03:00,662 INFO L78 Accepts]: Start accepts. Automaton has 178615 states and 651955 transitions. Word has length 25 [2021-06-05 23:03:00,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:00,662 INFO L482 AbstractCegarLoop]: Abstraction has 178615 states and 651955 transitions. [2021-06-05 23:03:00,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-06-05 23:03:00,663 INFO L276 IsEmpty]: Start isEmpty. Operand 178615 states and 651955 transitions. [2021-06-05 23:03:00,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:03:00,869 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:00,869 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:01,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 23:03:01,069 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:01,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:01,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1079475691, now seen corresponding path program 26 times [2021-06-05 23:03:01,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:01,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497364813] [2021-06-05 23:03:01,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:01,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:01,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497364813] [2021-06-05 23:03:01,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497364813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:01,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131869329] [2021-06-05 23:03:01,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:01,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:03:01,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:01,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 23:03:01,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:01,928 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:01,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131869329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:01,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:01,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:03:01,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040527471] [2021-06-05 23:03:01,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:03:01,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:01,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:03:01,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:03:01,929 INFO L87 Difference]: Start difference. First operand 178615 states and 651955 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-06-05 23:03:04,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:04,332 INFO L93 Difference]: Finished difference Result 310258 states and 1130711 transitions. [2021-06-05 23:03:04,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:03:04,332 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 25 [2021-06-05 23:03:04,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:06,016 INFO L225 Difference]: With dead ends: 310258 [2021-06-05 23:03:06,016 INFO L226 Difference]: Without dead ends: 310258 [2021-06-05 23:03:06,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:03:06,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310258 states. [2021-06-05 23:03:11,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310258 to 307681. [2021-06-05 23:03:11,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307681 states, 307680 states have (on average 3.6506727769110765) internal successors, (1123239), 307680 states have internal predecessors, (1123239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:13,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307681 states to 307681 states and 1123239 transitions. [2021-06-05 23:03:13,933 INFO L78 Accepts]: Start accepts. Automaton has 307681 states and 1123239 transitions. Word has length 25 [2021-06-05 23:03:13,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:13,934 INFO L482 AbstractCegarLoop]: Abstraction has 307681 states and 1123239 transitions. [2021-06-05 23:03:13,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-06-05 23:03:13,934 INFO L276 IsEmpty]: Start isEmpty. Operand 307681 states and 1123239 transitions. [2021-06-05 23:03:14,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:03:14,248 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:14,248 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:14,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-05 23:03:14,449 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:14,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:14,449 INFO L82 PathProgramCache]: Analyzing trace with hash -373421423, now seen corresponding path program 27 times [2021-06-05 23:03:14,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:14,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401087247] [2021-06-05 23:03:14,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:14,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:14,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:14,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401087247] [2021-06-05 23:03:14,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401087247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:14,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603564526] [2021-06-05 23:03:14,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:14,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:03:14,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:14,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 23:03:14,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:14,565 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:14,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603564526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:14,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:14,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 23:03:14,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929619802] [2021-06-05 23:03:14,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:03:14,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:14,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:03:14,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:03:14,566 INFO L87 Difference]: Start difference. First operand 307681 states and 1123239 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:17,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:17,621 INFO L93 Difference]: Finished difference Result 315768 states and 1151589 transitions. [2021-06-05 23:03:17,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:03:17,622 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:03:17,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:18,736 INFO L225 Difference]: With dead ends: 315768 [2021-06-05 23:03:18,736 INFO L226 Difference]: Without dead ends: 315768 [2021-06-05 23:03:18,736 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:03:19,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315768 states. [2021-06-05 23:03:25,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315768 to 307781. [2021-06-05 23:03:25,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307781 states, 307780 states have (on average 3.6506400675807393) internal successors, (1123594), 307780 states have internal predecessors, (1123594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:27,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307781 states to 307781 states and 1123594 transitions. [2021-06-05 23:03:27,526 INFO L78 Accepts]: Start accepts. Automaton has 307781 states and 1123594 transitions. Word has length 25 [2021-06-05 23:03:27,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:27,526 INFO L482 AbstractCegarLoop]: Abstraction has 307781 states and 1123594 transitions. [2021-06-05 23:03:27,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:27,526 INFO L276 IsEmpty]: Start isEmpty. Operand 307781 states and 1123594 transitions. [2021-06-05 23:03:27,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:03:27,932 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:27,932 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:28,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:28,133 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:28,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:28,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1675135705, now seen corresponding path program 28 times [2021-06-05 23:03:28,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:28,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409787990] [2021-06-05 23:03:28,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:28,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:28,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409787990] [2021-06-05 23:03:28,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409787990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:28,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232789181] [2021-06-05 23:03:28,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:28,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:03:28,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:28,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 23:03:28,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:28,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232789181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:28,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:28,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:03:28,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953039297] [2021-06-05 23:03:28,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:03:28,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:28,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:03:28,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:03:28,251 INFO L87 Difference]: Start difference. First operand 307781 states and 1123594 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:30,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:30,972 INFO L93 Difference]: Finished difference Result 404675 states and 1471493 transitions. [2021-06-05 23:03:30,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:03:30,973 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:03:30,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:33,250 INFO L225 Difference]: With dead ends: 404675 [2021-06-05 23:03:33,250 INFO L226 Difference]: Without dead ends: 404675 [2021-06-05 23:03:33,250 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:03:33,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404675 states. [2021-06-05 23:03:40,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404675 to 328058. [2021-06-05 23:03:40,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328058 states, 328057 states have (on average 3.6505454844737346) internal successors, (1197587), 328057 states have internal predecessors, (1197587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:42,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328058 states to 328058 states and 1197587 transitions. [2021-06-05 23:03:42,763 INFO L78 Accepts]: Start accepts. Automaton has 328058 states and 1197587 transitions. Word has length 25 [2021-06-05 23:03:42,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:42,763 INFO L482 AbstractCegarLoop]: Abstraction has 328058 states and 1197587 transitions. [2021-06-05 23:03:42,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:42,763 INFO L276 IsEmpty]: Start isEmpty. Operand 328058 states and 1197587 transitions. [2021-06-05 23:03:43,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:03:43,101 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:43,101 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:43,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-06-05 23:03:43,305 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:43,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:43,305 INFO L82 PathProgramCache]: Analyzing trace with hash 910634069, now seen corresponding path program 29 times [2021-06-05 23:03:43,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:43,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136926379] [2021-06-05 23:03:43,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:43,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:43,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:43,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136926379] [2021-06-05 23:03:43,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136926379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:43,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254240113] [2021-06-05 23:03:43,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:43,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:03:43,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:43,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 23:03:43,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:43,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254240113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:43,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:43,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:03:43,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774024392] [2021-06-05 23:03:43,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:03:43,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:43,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:03:43,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:03:43,419 INFO L87 Difference]: Start difference. First operand 328058 states and 1197587 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-06-05 23:03:48,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:48,769 INFO L93 Difference]: Finished difference Result 638146 states and 2324169 transitions. [2021-06-05 23:03:48,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:03:48,770 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 25 [2021-06-05 23:03:48,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:51,192 INFO L225 Difference]: With dead ends: 638146 [2021-06-05 23:03:51,192 INFO L226 Difference]: Without dead ends: 638146 [2021-06-05 23:03:51,193 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:03:52,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638146 states. [2021-06-05 23:04:05,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638146 to 633057. [2021-06-05 23:04:06,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633057 states, 633056 states have (on average 3.6415419804882982) internal successors, (2305300), 633056 states have internal predecessors, (2305300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:13,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633057 states to 633057 states and 2305300 transitions. [2021-06-05 23:04:13,379 INFO L78 Accepts]: Start accepts. Automaton has 633057 states and 2305300 transitions. Word has length 25 [2021-06-05 23:04:13,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:13,379 INFO L482 AbstractCegarLoop]: Abstraction has 633057 states and 2305300 transitions. [2021-06-05 23:04:13,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-06-05 23:04:13,379 INFO L276 IsEmpty]: Start isEmpty. Operand 633057 states and 2305300 transitions. [2021-06-05 23:04:13,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:04:13,925 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:13,925 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:14,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:14,133 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:14,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:14,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1396438173, now seen corresponding path program 30 times [2021-06-05 23:04:14,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:14,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241698675] [2021-06-05 23:04:14,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:14,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:14,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241698675] [2021-06-05 23:04:14,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241698675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:14,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752490686] [2021-06-05 23:04:14,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:14,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:04:14,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:04:14,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 23:04:14,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:14,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752490686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:14,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:14,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:04:14,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338741992] [2021-06-05 23:04:14,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:04:14,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:14,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:04:14,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:04:14,251 INFO L87 Difference]: Start difference. First operand 633057 states and 2305300 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-06-05 23:04:20,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:20,259 INFO L93 Difference]: Finished difference Result 745515 states and 2707335 transitions. [2021-06-05 23:04:20,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:04:20,260 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 25 [2021-06-05 23:04:20,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:04:23,946 INFO L225 Difference]: With dead ends: 745515 [2021-06-05 23:04:23,946 INFO L226 Difference]: Without dead ends: 745515 [2021-06-05 23:04:23,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:04:25,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745515 states. [2021-06-05 23:04:38,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745515 to 684267. [2021-06-05 23:04:39,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684267 states, 684266 states have (on average 3.6362379542458636) internal successors, (2488154), 684266 states have internal predecessors, (2488154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:47,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684267 states to 684267 states and 2488154 transitions. [2021-06-05 23:04:47,486 INFO L78 Accepts]: Start accepts. Automaton has 684267 states and 2488154 transitions. Word has length 25 [2021-06-05 23:04:47,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:04:47,486 INFO L482 AbstractCegarLoop]: Abstraction has 684267 states and 2488154 transitions. [2021-06-05 23:04:47,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-06-05 23:04:47,486 INFO L276 IsEmpty]: Start isEmpty. Operand 684267 states and 2488154 transitions. [2021-06-05 23:04:48,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:04:48,519 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:04:48,519 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:04:48,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:48,731 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:04:48,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:04:48,732 INFO L82 PathProgramCache]: Analyzing trace with hash 759971319, now seen corresponding path program 31 times [2021-06-05 23:04:48,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:04:48,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035501348] [2021-06-05 23:04:48,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:04:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:48,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:04:48,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035501348] [2021-06-05 23:04:48,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035501348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:48,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475523550] [2021-06-05 23:04:48,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:04:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:04:48,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 23:04:48,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:04:48,869 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:04:48,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475523550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:04:48,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:04:48,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 23:04:48,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860316532] [2021-06-05 23:04:48,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:04:48,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:04:48,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:04:48,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:04:48,870 INFO L87 Difference]: Start difference. First operand 684267 states and 2488154 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:04:57,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:04:57,090 INFO L93 Difference]: Finished difference Result 688116 states and 2501277 transitions. [2021-06-05 23:04:57,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:04:57,090 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:04:57,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:02,291 INFO L225 Difference]: With dead ends: 688116 [2021-06-05 23:05:02,291 INFO L226 Difference]: Without dead ends: 688116 [2021-06-05 23:05:02,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:05:03,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688116 states. [2021-06-05 23:05:19,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688116 to 684289. [2021-06-05 23:05:20,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684289 states, 684288 states have (on average 3.6362189604377106) internal successors, (2488221), 684288 states have internal predecessors, (2488221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684289 states to 684289 states and 2488221 transitions. [2021-06-05 23:05:28,235 INFO L78 Accepts]: Start accepts. Automaton has 684289 states and 2488221 transitions. Word has length 25 [2021-06-05 23:05:28,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:05:28,235 INFO L482 AbstractCegarLoop]: Abstraction has 684289 states and 2488221 transitions. [2021-06-05 23:05:28,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:28,235 INFO L276 IsEmpty]: Start isEmpty. Operand 684289 states and 2488221 transitions. [2021-06-05 23:05:29,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:05:29,382 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:05:29,382 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:05:29,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2021-06-05 23:05:29,606 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:05:29,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:05:29,606 INFO L82 PathProgramCache]: Analyzing trace with hash -326436511, now seen corresponding path program 111 times [2021-06-05 23:05:29,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:05:29,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816283028] [2021-06-05 23:05:29,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:05:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:05:29,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:29,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:05:29,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816283028] [2021-06-05 23:05:29,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816283028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:29,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905901267] [2021-06-05 23:05:29,684 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:05:29,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:05:29,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:05:29,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:05:29,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:05:29,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:05:29,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905901267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:05:29,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:05:29,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 23:05:29,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957488179] [2021-06-05 23:05:29,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:05:29,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:05:29,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:05:29,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:05:29,819 INFO L87 Difference]: Start difference. First operand 684289 states and 2488221 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:05:35,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:05:35,999 INFO L93 Difference]: Finished difference Result 687113 states and 2497284 transitions. [2021-06-05 23:05:36,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:05:36,000 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:05:36,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:05:38,752 INFO L225 Difference]: With dead ends: 687113 [2021-06-05 23:05:38,752 INFO L226 Difference]: Without dead ends: 687038 [2021-06-05 23:05:38,752 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 217.4ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:05:40,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687038 states. [2021-06-05 23:05:57,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687038 to 684882. [2021-06-05 23:05:58,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684882 states, 684881 states have (on average 3.6360594030203788) internal successors, (2490268), 684881 states have internal predecessors, (2490268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:03,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684882 states to 684882 states and 2490268 transitions. [2021-06-05 23:06:03,796 INFO L78 Accepts]: Start accepts. Automaton has 684882 states and 2490268 transitions. Word has length 25 [2021-06-05 23:06:03,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:03,796 INFO L482 AbstractCegarLoop]: Abstraction has 684882 states and 2490268 transitions. [2021-06-05 23:06:03,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:03,796 INFO L276 IsEmpty]: Start isEmpty. Operand 684882 states and 2490268 transitions. [2021-06-05 23:06:04,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:06:04,427 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:04,427 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:04,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:04,628 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:04,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:04,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1241517999, now seen corresponding path program 112 times [2021-06-05 23:06:04,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:04,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596309363] [2021-06-05 23:06:04,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:04,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:04,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596309363] [2021-06-05 23:06:04,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596309363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:04,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301711979] [2021-06-05 23:06:04,715 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:04,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:06:04,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:06:04,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:06:04,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:04,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301711979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:04,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:04,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 23:06:04,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358830742] [2021-06-05 23:06:04,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 23:06:04,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:04,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 23:06:04,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:06:04,837 INFO L87 Difference]: Start difference. First operand 684882 states and 2490268 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:11,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:11,115 INFO L93 Difference]: Finished difference Result 690033 states and 2507264 transitions. [2021-06-05 23:06:11,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:06:11,115 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:06:11,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:13,652 INFO L225 Difference]: With dead ends: 690033 [2021-06-05 23:06:13,652 INFO L226 Difference]: Without dead ends: 690008 [2021-06-05 23:06:13,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 319.7ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:06:15,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690008 states. [2021-06-05 23:06:32,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690008 to 685088. [2021-06-05 23:06:34,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685088 states, 685087 states have (on average 3.6364344966405726) internal successors, (2491274), 685087 states have internal predecessors, (2491274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:39,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685088 states to 685088 states and 2491274 transitions. [2021-06-05 23:06:39,151 INFO L78 Accepts]: Start accepts. Automaton has 685088 states and 2491274 transitions. Word has length 25 [2021-06-05 23:06:39,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:06:39,151 INFO L482 AbstractCegarLoop]: Abstraction has 685088 states and 2491274 transitions. [2021-06-05 23:06:39,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:39,151 INFO L276 IsEmpty]: Start isEmpty. Operand 685088 states and 2491274 transitions. [2021-06-05 23:06:39,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:06:39,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:06:39,790 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:06:39,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:39,991 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:06:39,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:06:39,991 INFO L82 PathProgramCache]: Analyzing trace with hash 2103761757, now seen corresponding path program 113 times [2021-06-05 23:06:39,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:06:39,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074561046] [2021-06-05 23:06:39,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:06:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:06:40,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:40,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:06:40,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074561046] [2021-06-05 23:06:40,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074561046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:40,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981271114] [2021-06-05 23:06:40,025 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:06:40,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:06:40,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:06:40,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 23:06:40,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:06:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:06:40,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981271114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:06:40,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:06:40,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-06-05 23:06:40,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053311180] [2021-06-05 23:06:40,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:06:40,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:06:40,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:06:40,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:06:40,117 INFO L87 Difference]: Start difference. First operand 685088 states and 2491274 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:06:49,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:06:49,272 INFO L93 Difference]: Finished difference Result 1083545 states and 3960729 transitions. [2021-06-05 23:06:49,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:06:49,273 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:06:49,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:06:58,144 INFO L225 Difference]: With dead ends: 1083545 [2021-06-05 23:06:58,144 INFO L226 Difference]: Without dead ends: 1083519 [2021-06-05 23:06:58,144 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:06:59,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083519 states. [2021-06-05 23:07:22,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083519 to 953614. [2021-06-05 23:07:23,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953614 states, 953613 states have (on average 3.6471136614119146) internal successors, (3477935), 953613 states have internal predecessors, (3477935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 23:07:27,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-06-05 23:07:27,617 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 23:07:27,619 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 23:07:27,620 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 23:07:27,620 INFO L202 PluginConnector]: Adding new model mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 11:07:27 BasicIcfg [2021-06-05 23:07:27,620 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 23:07:27,620 INFO L168 Benchmark]: Toolchain (without parser) took 616708.71 ms. Allocated memory was 341.8 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 321.3 MB in the beginning and 8.7 GB in the end (delta: -8.4 GB). Peak memory consumption was 8.5 GB. Max. memory is 16.0 GB. [2021-06-05 23:07:27,621 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 341.8 MB. Free memory was 322.4 MB in the beginning and 322.3 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:07:27,621 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.55 ms. Allocated memory is still 341.8 MB. Free memory was 321.2 MB in the beginning and 319.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:07:27,621 INFO L168 Benchmark]: Boogie Preprocessor took 16.59 ms. Allocated memory is still 341.8 MB. Free memory was 319.8 MB in the beginning and 318.8 MB in the end (delta: 931.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 23:07:27,621 INFO L168 Benchmark]: RCFGBuilder took 229.52 ms. Allocated memory is still 341.8 MB. Free memory was 318.8 MB in the beginning and 306.7 MB in the end (delta: 12.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 23:07:27,621 INFO L168 Benchmark]: TraceAbstraction took 616427.93 ms. Allocated memory was 341.8 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 306.2 MB in the beginning and 8.7 GB in the end (delta: -8.4 GB). Peak memory consumption was 8.4 GB. Max. memory is 16.0 GB. [2021-06-05 23:07:27,621 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 0.13 ms. Allocated memory is still 341.8 MB. Free memory was 322.4 MB in the beginning and 322.3 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 29.55 ms. Allocated memory is still 341.8 MB. Free memory was 321.2 MB in the beginning and 319.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.59 ms. Allocated memory is still 341.8 MB. Free memory was 319.8 MB in the beginning and 318.8 MB in the end (delta: 931.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 229.52 ms. Allocated memory is still 341.8 MB. Free memory was 318.8 MB in the beginning and 306.7 MB in the end (delta: 12.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 616427.93 ms. Allocated memory was 341.8 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 306.2 MB in the beginning and 8.7 GB in the end (delta: -8.4 GB). Peak memory consumption was 8.4 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (549530 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 39 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 616354.4ms, OverallIterations: 171, TraceHistogramMax: 3, EmptinessCheckTime: 20713.8ms, AutomataDifference: 184144.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6583 SDtfs, 18356 SDslu, 31172 SDs, 0 SdLazy, 39886 SolverSat, 6095 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20724.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5989 GetRequests, 3080 SyntacticMatches, 311 SemanticMatches, 2598 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14374 ImplicationChecksByTransitivity, 33448.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=685088occurred in iteration=170, InterpolantAutomatonStates: 2543, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 340463.4ms AutomataMinimizationTime, 171 MinimizatonAttempts, 1187080 StatesRemovedByMinimization, 170 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 520.9ms SsaConstructionTime, 2392.9ms SatisfiabilityAnalysisTime, 29530.6ms InterpolantComputationTime, 7899 NumberOfCodeBlocks, 7892 NumberOfCodeBlocksAsserted, 560 NumberOfCheckSat, 7562 ConstructedInterpolants, 0 QuantifiedInterpolants, 55958 SizeOfPredicates, 266 NumberOfNonLiveVariables, 10162 ConjunctsInSsa, 2243 ConjunctsInUnsatCore, 337 InterpolantComputations, 7 PerfectInterpolantSequences, 305/2676 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