java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:41:54,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:41:54,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:41:54,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:41:54,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:41:54,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:41:54,346 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:41:54,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:41:54,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:41:54,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:41:54,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:41:54,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:41:54,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:41:54,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:41:54,367 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:41:54,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:41:54,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:41:54,374 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:41:54,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:41:54,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:41:54,384 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:41:54,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:41:54,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:41:54,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:41:54,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:41:54,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:41:54,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:41:54,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:41:54,399 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:41:54,401 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:41:54,401 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:41:54,402 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:41:54,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:41:54,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:41:54,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:41:54,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:41:54,405 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:41:54,423 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:41:54,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:41:54,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:41:54,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:41:54,426 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:41:54,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:41:54,427 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:41:54,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:41:54,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:41:54,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:41:54,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:41:54,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:41:54,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:41:54,429 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:41:54,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:41:54,429 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:41:54,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:41:54,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:41:54,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:41:54,430 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:41:54,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:41:54,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:41:54,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:41:54,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:41:54,431 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:41:54,431 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:41:54,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:41:54,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:41:54,432 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:41:54,706 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:41:54,723 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:41:54,727 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:41:54,728 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:41:54,729 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:41:54,730 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-1.i [2019-10-14 21:41:54,803 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efece2210/599a9bfc1a0f48d5a03c4febf0535bca/FLAG06668ba68 [2019-10-14 21:41:55,266 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:41:55,267 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-1.i [2019-10-14 21:41:55,274 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efece2210/599a9bfc1a0f48d5a03c4febf0535bca/FLAG06668ba68 [2019-10-14 21:41:55,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efece2210/599a9bfc1a0f48d5a03c4febf0535bca [2019-10-14 21:41:55,670 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:41:55,671 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:41:55,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:41:55,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:41:55,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:41:55,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:41:55" (1/1) ... [2019-10-14 21:41:55,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5370fc2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:55, skipping insertion in model container [2019-10-14 21:41:55,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:41:55" (1/1) ... [2019-10-14 21:41:55,690 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:41:55,711 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:41:55,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:41:55,896 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:41:55,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:41:56,027 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:41:56,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:56 WrapperNode [2019-10-14 21:41:56,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:41:56,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:41:56,028 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:41:56,028 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:41:56,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:56" (1/1) ... [2019-10-14 21:41:56,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:56" (1/1) ... [2019-10-14 21:41:56,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:56" (1/1) ... [2019-10-14 21:41:56,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:56" (1/1) ... [2019-10-14 21:41:56,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:56" (1/1) ... [2019-10-14 21:41:56,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:56" (1/1) ... [2019-10-14 21:41:56,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:56" (1/1) ... [2019-10-14 21:41:56,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:41:56,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:41:56,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:41:56,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:41:56,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:56" (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 [2019-10-14 21:41:56,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:41:56,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:41:56,144 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:41:56,144 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2019-10-14 21:41:56,144 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2019-10-14 21:41:56,144 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:41:56,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:41:56,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:41:56,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:41:56,145 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2019-10-14 21:41:56,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:41:56,147 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2019-10-14 21:41:56,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:41:56,148 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:41:56,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:41:56,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:41:56,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:41:56,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:41:56,532 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:41:56,533 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-14 21:41:56,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:56 BoogieIcfgContainer [2019-10-14 21:41:56,534 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:41:56,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:41:56,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:41:56,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:41:56,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:41:55" (1/3) ... [2019-10-14 21:41:56,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b2d1808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:56, skipping insertion in model container [2019-10-14 21:41:56,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:56" (2/3) ... [2019-10-14 21:41:56,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b2d1808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:56, skipping insertion in model container [2019-10-14 21:41:56,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:56" (3/3) ... [2019-10-14 21:41:56,546 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-1.i [2019-10-14 21:41:56,562 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:41:56,570 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:41:56,581 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:41:56,602 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:41:56,603 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:41:56,603 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:41:56,603 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:41:56,603 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:41:56,603 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:41:56,603 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:41:56,603 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:41:56,621 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2019-10-14 21:41:56,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 21:41:56,627 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:56,628 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:56,630 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:56,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:56,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1780536170, now seen corresponding path program 1 times [2019-10-14 21:41:56,644 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:56,644 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687942198] [2019-10-14 21:41:56,644 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:56,645 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:56,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:56,844 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687942198] [2019-10-14 21:41:56,845 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:56,845 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:41:56,846 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857871556] [2019-10-14 21:41:56,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:41:56,853 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:56,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:41:56,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:41:56,874 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 4 states. [2019-10-14 21:41:57,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:57,255 INFO L93 Difference]: Finished difference Result 129 states and 190 transitions. [2019-10-14 21:41:57,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:41:57,258 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-14 21:41:57,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:57,279 INFO L225 Difference]: With dead ends: 129 [2019-10-14 21:41:57,279 INFO L226 Difference]: Without dead ends: 75 [2019-10-14 21:41:57,288 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:41:57,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-14 21:41:57,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 50. [2019-10-14 21:41:57,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-14 21:41:57,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2019-10-14 21:41:57,355 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 14 [2019-10-14 21:41:57,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:57,356 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2019-10-14 21:41:57,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:41:57,356 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2019-10-14 21:41:57,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:41:57,360 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:57,361 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:57,361 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:57,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:57,363 INFO L82 PathProgramCache]: Analyzing trace with hash 2111973388, now seen corresponding path program 1 times [2019-10-14 21:41:57,363 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:57,363 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901133712] [2019-10-14 21:41:57,364 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:57,364 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:57,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:57,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:57,447 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901133712] [2019-10-14 21:41:57,448 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329244915] [2019-10-14 21:41:57,448 INFO L94 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 [2019-10-14 21:41:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:57,505 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:41:57,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:57,554 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:57,555 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:41:57,555 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025588317] [2019-10-14 21:41:57,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:41:57,561 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:57,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:41:57,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:41:57,562 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 6 states. [2019-10-14 21:41:57,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:57,815 INFO L93 Difference]: Finished difference Result 142 states and 182 transitions. [2019-10-14 21:41:57,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:41:57,815 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-10-14 21:41:57,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:57,818 INFO L225 Difference]: With dead ends: 142 [2019-10-14 21:41:57,818 INFO L226 Difference]: Without dead ends: 101 [2019-10-14 21:41:57,819 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:41:57,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-14 21:41:57,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 52. [2019-10-14 21:41:57,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 21:41:57,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2019-10-14 21:41:57,831 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 16 [2019-10-14 21:41:57,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:57,832 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2019-10-14 21:41:57,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:41:57,832 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2019-10-14 21:41:57,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 21:41:57,833 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:57,833 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:58,038 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:58,042 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:58,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:58,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1499407314, now seen corresponding path program 2 times [2019-10-14 21:41:58,042 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:58,042 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565469354] [2019-10-14 21:41:58,043 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:58,043 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:58,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:58,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:58,141 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565469354] [2019-10-14 21:41:58,141 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974481576] [2019-10-14 21:41:58,141 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:58,190 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 21:41:58,190 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:58,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:41:58,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:58,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:41:58,220 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:41:58,221 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2019-10-14 21:41:58,221 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025532105] [2019-10-14 21:41:58,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:41:58,222 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:58,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:41:58,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:41:58,223 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 4 states. [2019-10-14 21:41:58,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:58,265 INFO L93 Difference]: Finished difference Result 96 states and 117 transitions. [2019-10-14 21:41:58,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:41:58,267 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-14 21:41:58,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:58,268 INFO L225 Difference]: With dead ends: 96 [2019-10-14 21:41:58,268 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 21:41:58,271 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:41:58,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 21:41:58,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2019-10-14 21:41:58,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 21:41:58,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2019-10-14 21:41:58,283 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 18 [2019-10-14 21:41:58,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:58,284 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2019-10-14 21:41:58,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:41:58,284 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2019-10-14 21:41:58,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 21:41:58,287 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:58,287 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:58,490 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:58,490 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:58,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:58,491 INFO L82 PathProgramCache]: Analyzing trace with hash 723083025, now seen corresponding path program 1 times [2019-10-14 21:41:58,492 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:58,492 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534274151] [2019-10-14 21:41:58,493 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:58,493 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:58,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:41:58,607 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534274151] [2019-10-14 21:41:58,607 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:58,607 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 21:41:58,608 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181481788] [2019-10-14 21:41:58,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:41:58,608 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:58,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:41:58,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:41:58,609 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 5 states. [2019-10-14 21:41:58,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:58,757 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2019-10-14 21:41:58,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:58,758 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2019-10-14 21:41:58,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:58,759 INFO L225 Difference]: With dead ends: 98 [2019-10-14 21:41:58,759 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 21:41:58,760 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:41:58,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 21:41:58,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2019-10-14 21:41:58,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:41:58,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2019-10-14 21:41:58,769 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 39 [2019-10-14 21:41:58,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:58,770 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2019-10-14 21:41:58,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:41:58,770 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2019-10-14 21:41:58,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 21:41:58,772 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:58,772 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:58,772 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:58,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:58,773 INFO L82 PathProgramCache]: Analyzing trace with hash -648100369, now seen corresponding path program 1 times [2019-10-14 21:41:58,773 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:58,773 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447255122] [2019-10-14 21:41:58,773 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:58,774 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:58,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:58,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:58,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:41:58,897 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447255122] [2019-10-14 21:41:58,898 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077175091] [2019-10-14 21:41:58,898 INFO L94 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 [2019-10-14 21:41:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:58,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:58,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:59,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:41:59,009 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:59,010 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2019-10-14 21:41:59,010 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044645693] [2019-10-14 21:41:59,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:41:59,011 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:59,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:41:59,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:41:59,013 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 8 states. [2019-10-14 21:41:59,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:59,252 INFO L93 Difference]: Finished difference Result 116 states and 140 transitions. [2019-10-14 21:41:59,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:41:59,254 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2019-10-14 21:41:59,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:59,256 INFO L225 Difference]: With dead ends: 116 [2019-10-14 21:41:59,256 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 21:41:59,261 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:41:59,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 21:41:59,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2019-10-14 21:41:59,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-14 21:41:59,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2019-10-14 21:41:59,273 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 41 [2019-10-14 21:41:59,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:59,273 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2019-10-14 21:41:59,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:41:59,274 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2019-10-14 21:41:59,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 21:41:59,275 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:59,280 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:59,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:59,484 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:59,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:59,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1873779725, now seen corresponding path program 2 times [2019-10-14 21:41:59,484 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:59,485 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000252259] [2019-10-14 21:41:59,485 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:59,485 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:59,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:59,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:59,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:41:59,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000252259] [2019-10-14 21:41:59,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002144947] [2019-10-14 21:41:59,590 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-10-14 21:41:59,650 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:41:59,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:59,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:41:59,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:59,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:41:59,692 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:59,692 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2019-10-14 21:41:59,692 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217562280] [2019-10-14 21:41:59,693 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:41:59,693 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:59,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:41:59,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:41:59,694 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 10 states. [2019-10-14 21:41:59,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:59,977 INFO L93 Difference]: Finished difference Result 147 states and 183 transitions. [2019-10-14 21:41:59,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:41:59,978 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2019-10-14 21:41:59,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:59,979 INFO L225 Difference]: With dead ends: 147 [2019-10-14 21:41:59,980 INFO L226 Difference]: Without dead ends: 105 [2019-10-14 21:41:59,981 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:41:59,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-14 21:41:59,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 67. [2019-10-14 21:41:59,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-14 21:41:59,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2019-10-14 21:41:59,992 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 43 [2019-10-14 21:41:59,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:59,993 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2019-10-14 21:41:59,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:41:59,993 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2019-10-14 21:41:59,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-14 21:41:59,995 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:59,995 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:00,198 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:00,199 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:00,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:00,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1764017907, now seen corresponding path program 1 times [2019-10-14 21:42:00,200 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:00,201 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99924609] [2019-10-14 21:42:00,201 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:00,201 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:00,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:00,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:00,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:00,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:42:00,313 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99924609] [2019-10-14 21:42:00,313 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:00,314 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 21:42:00,314 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922981841] [2019-10-14 21:42:00,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:42:00,315 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:00,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:42:00,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:42:00,315 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 6 states. [2019-10-14 21:42:00,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:00,438 INFO L93 Difference]: Finished difference Result 97 states and 114 transitions. [2019-10-14 21:42:00,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:42:00,439 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2019-10-14 21:42:00,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:00,440 INFO L225 Difference]: With dead ends: 97 [2019-10-14 21:42:00,440 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 21:42:00,441 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:42:00,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 21:42:00,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-10-14 21:42:00,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-14 21:42:00,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2019-10-14 21:42:00,448 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 57 [2019-10-14 21:42:00,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:00,449 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2019-10-14 21:42:00,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:42:00,449 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2019-10-14 21:42:00,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-14 21:42:00,450 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:00,451 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:00,451 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:00,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:00,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1023550559, now seen corresponding path program 3 times [2019-10-14 21:42:00,451 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:00,452 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340797330] [2019-10-14 21:42:00,452 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:00,452 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:00,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:00,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:00,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-14 21:42:00,635 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340797330] [2019-10-14 21:42:00,636 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785371433] [2019-10-14 21:42:00,636 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-10-14 21:42:00,694 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 21:42:00,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:00,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:42:00,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:00,820 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:42:00,821 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:42:00,821 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 17 [2019-10-14 21:42:00,821 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560829237] [2019-10-14 21:42:00,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:42:00,822 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:00,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:42:00,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:42:00,823 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 10 states. [2019-10-14 21:42:01,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:01,071 INFO L93 Difference]: Finished difference Result 120 states and 148 transitions. [2019-10-14 21:42:01,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:42:01,072 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2019-10-14 21:42:01,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:01,075 INFO L225 Difference]: With dead ends: 120 [2019-10-14 21:42:01,076 INFO L226 Difference]: Without dead ends: 102 [2019-10-14 21:42:01,076 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:42:01,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-10-14 21:42:01,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2019-10-14 21:42:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-14 21:42:01,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2019-10-14 21:42:01,087 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 62 [2019-10-14 21:42:01,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:01,088 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2019-10-14 21:42:01,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:42:01,088 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2019-10-14 21:42:01,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-14 21:42:01,089 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:01,089 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:01,298 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:01,298 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:01,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:01,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1822237910, now seen corresponding path program 1 times [2019-10-14 21:42:01,300 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:01,300 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488807976] [2019-10-14 21:42:01,301 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:01,301 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:01,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:01,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-14 21:42:01,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488807976] [2019-10-14 21:42:01,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626504880] [2019-10-14 21:42:01,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 21:42:01,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:01,487 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:42:01,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-14 21:42:01,518 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:01,518 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2019-10-14 21:42:01,518 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24630373] [2019-10-14 21:42:01,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:42:01,519 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:01,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:42:01,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:42:01,520 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand 10 states. [2019-10-14 21:42:01,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:01,724 INFO L93 Difference]: Finished difference Result 168 states and 204 transitions. [2019-10-14 21:42:01,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:42:01,724 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2019-10-14 21:42:01,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:01,726 INFO L225 Difference]: With dead ends: 168 [2019-10-14 21:42:01,726 INFO L226 Difference]: Without dead ends: 108 [2019-10-14 21:42:01,727 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:42:01,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-10-14 21:42:01,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 77. [2019-10-14 21:42:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-14 21:42:01,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2019-10-14 21:42:01,736 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 62 [2019-10-14 21:42:01,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:01,736 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2019-10-14 21:42:01,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:42:01,736 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2019-10-14 21:42:01,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-14 21:42:01,738 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:01,738 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:01,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:01,942 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:01,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:01,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1979313528, now seen corresponding path program 2 times [2019-10-14 21:42:01,943 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:01,944 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579116374] [2019-10-14 21:42:01,944 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:01,944 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:01,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:02,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:02,039 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-14 21:42:02,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579116374] [2019-10-14 21:42:02,040 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276280819] [2019-10-14 21:42:02,040 INFO L92 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 [2019-10-14 21:42:02,109 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:02,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:02,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:42:02,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:02,137 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-14 21:42:02,137 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:02,138 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2019-10-14 21:42:02,138 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485616012] [2019-10-14 21:42:02,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:42:02,139 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:02,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:42:02,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:42:02,139 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand 11 states. [2019-10-14 21:42:02,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:02,400 INFO L93 Difference]: Finished difference Result 176 states and 214 transitions. [2019-10-14 21:42:02,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:42:02,401 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2019-10-14 21:42:02,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:02,402 INFO L225 Difference]: With dead ends: 176 [2019-10-14 21:42:02,403 INFO L226 Difference]: Without dead ends: 116 [2019-10-14 21:42:02,404 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:42:02,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-10-14 21:42:02,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 79. [2019-10-14 21:42:02,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-14 21:42:02,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2019-10-14 21:42:02,412 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 64 [2019-10-14 21:42:02,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:02,412 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2019-10-14 21:42:02,412 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:42:02,412 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2019-10-14 21:42:02,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 21:42:02,413 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:02,413 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:02,617 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:02,617 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:02,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:02,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1689840230, now seen corresponding path program 3 times [2019-10-14 21:42:02,618 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:02,619 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749141305] [2019-10-14 21:42:02,619 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:02,619 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:02,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:02,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-14 21:42:02,758 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749141305] [2019-10-14 21:42:02,758 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157108668] [2019-10-14 21:42:02,758 INFO L92 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 [2019-10-14 21:42:02,837 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:42:02,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:02,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:42:02,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-14 21:42:02,904 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:02,905 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 14 [2019-10-14 21:42:02,905 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125217878] [2019-10-14 21:42:02,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:42:02,907 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:02,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:42:02,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:42:02,908 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand 14 states. [2019-10-14 21:42:03,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:03,241 INFO L93 Difference]: Finished difference Result 217 states and 268 transitions. [2019-10-14 21:42:03,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 21:42:03,242 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-10-14 21:42:03,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:03,244 INFO L225 Difference]: With dead ends: 217 [2019-10-14 21:42:03,244 INFO L226 Difference]: Without dead ends: 157 [2019-10-14 21:42:03,244 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:42:03,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-10-14 21:42:03,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 90. [2019-10-14 21:42:03,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-14 21:42:03,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2019-10-14 21:42:03,254 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 66 [2019-10-14 21:42:03,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:03,255 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2019-10-14 21:42:03,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:42:03,255 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2019-10-14 21:42:03,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-14 21:42:03,256 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:03,256 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:03,460 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:03,461 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:03,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:03,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1331963256, now seen corresponding path program 4 times [2019-10-14 21:42:03,461 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:03,461 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293373173] [2019-10-14 21:42:03,461 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:03,461 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:03,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:03,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:03,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:03,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:03,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-14 21:42:03,621 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293373173] [2019-10-14 21:42:03,622 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079907134] [2019-10-14 21:42:03,622 INFO L92 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 [2019-10-14 21:42:03,729 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:03,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:03,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:42:03,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:03,891 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:42:03,891 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:03,892 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-10-14 21:42:03,892 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156282543] [2019-10-14 21:42:03,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:42:03,893 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:03,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:42:03,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:42:03,894 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand 18 states. [2019-10-14 21:42:04,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:04,604 INFO L93 Difference]: Finished difference Result 215 states and 265 transitions. [2019-10-14 21:42:04,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 21:42:04,605 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2019-10-14 21:42:04,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:04,606 INFO L225 Difference]: With dead ends: 215 [2019-10-14 21:42:04,607 INFO L226 Difference]: Without dead ends: 146 [2019-10-14 21:42:04,608 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=326, Invalid=1396, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 21:42:04,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-10-14 21:42:04,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 87. [2019-10-14 21:42:04,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-10-14 21:42:04,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2019-10-14 21:42:04,618 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 85 [2019-10-14 21:42:04,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:04,618 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2019-10-14 21:42:04,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:42:04,618 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2019-10-14 21:42:04,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-14 21:42:04,619 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:04,619 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:04,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:04,832 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:04,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:04,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1358293311, now seen corresponding path program 5 times [2019-10-14 21:42:04,833 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:04,833 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14774443] [2019-10-14 21:42:04,833 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:04,833 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:04,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:04,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:04,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:04,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:04,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:42:04,980 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14774443] [2019-10-14 21:42:04,980 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124158554] [2019-10-14 21:42:04,980 INFO L92 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 [2019-10-14 21:42:05,167 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-10-14 21:42:05,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:05,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:42:05,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-10-14 21:42:05,229 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:05,229 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2019-10-14 21:42:05,229 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400748112] [2019-10-14 21:42:05,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:42:05,230 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:05,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:42:05,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:42:05,231 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 17 states. [2019-10-14 21:42:05,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:05,694 INFO L93 Difference]: Finished difference Result 224 states and 272 transitions. [2019-10-14 21:42:05,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:42:05,694 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 87 [2019-10-14 21:42:05,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:05,696 INFO L225 Difference]: With dead ends: 224 [2019-10-14 21:42:05,697 INFO L226 Difference]: Without dead ends: 160 [2019-10-14 21:42:05,698 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:42:05,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-10-14 21:42:05,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 98. [2019-10-14 21:42:05,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-14 21:42:05,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2019-10-14 21:42:05,708 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 87 [2019-10-14 21:42:05,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:05,708 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2019-10-14 21:42:05,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:42:05,708 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2019-10-14 21:42:05,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-14 21:42:05,709 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:05,710 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:05,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:05,915 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:05,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:05,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1301333860, now seen corresponding path program 6 times [2019-10-14 21:42:05,915 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:05,915 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85682958] [2019-10-14 21:42:05,916 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:05,916 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:05,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:06,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:06,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:06,067 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2019-10-14 21:42:06,067 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85682958] [2019-10-14 21:42:06,068 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688007742] [2019-10-14 21:42:06,068 INFO L92 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 [2019-10-14 21:42:06,494 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-14 21:42:06,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:06,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:42:06,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2019-10-14 21:42:06,602 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:06,603 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-10-14 21:42:06,603 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413153330] [2019-10-14 21:42:06,606 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:42:06,606 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:06,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:42:06,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:42:06,607 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand 19 states. [2019-10-14 21:42:07,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:07,173 INFO L93 Difference]: Finished difference Result 250 states and 304 transitions. [2019-10-14 21:42:07,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:42:07,173 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 106 [2019-10-14 21:42:07,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:07,175 INFO L225 Difference]: With dead ends: 250 [2019-10-14 21:42:07,175 INFO L226 Difference]: Without dead ends: 177 [2019-10-14 21:42:07,176 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:42:07,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-10-14 21:42:07,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 109. [2019-10-14 21:42:07,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-14 21:42:07,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2019-10-14 21:42:07,187 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 106 [2019-10-14 21:42:07,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:07,187 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2019-10-14 21:42:07,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:42:07,187 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2019-10-14 21:42:07,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-14 21:42:07,188 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:07,189 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:07,394 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:07,394 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:07,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:07,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1402588439, now seen corresponding path program 7 times [2019-10-14 21:42:07,395 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:07,396 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756781651] [2019-10-14 21:42:07,396 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:07,396 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:07,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:07,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:07,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-14 21:42:07,557 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756781651] [2019-10-14 21:42:07,558 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186751304] [2019-10-14 21:42:07,558 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-10-14 21:42:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:07,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:42:07,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-14 21:42:07,701 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:07,701 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2019-10-14 21:42:07,701 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034343149] [2019-10-14 21:42:07,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:42:07,702 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:07,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:42:07,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:42:07,702 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand 16 states. [2019-10-14 21:42:08,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:08,088 INFO L93 Difference]: Finished difference Result 260 states and 314 transitions. [2019-10-14 21:42:08,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:42:08,089 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 125 [2019-10-14 21:42:08,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:08,091 INFO L225 Difference]: With dead ends: 260 [2019-10-14 21:42:08,091 INFO L226 Difference]: Without dead ends: 178 [2019-10-14 21:42:08,092 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:42:08,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-10-14 21:42:08,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 111. [2019-10-14 21:42:08,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-14 21:42:08,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 127 transitions. [2019-10-14 21:42:08,102 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 127 transitions. Word has length 125 [2019-10-14 21:42:08,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:08,103 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 127 transitions. [2019-10-14 21:42:08,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:42:08,103 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 127 transitions. [2019-10-14 21:42:08,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-14 21:42:08,105 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:08,105 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:08,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:08,308 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:08,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:08,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1395161141, now seen corresponding path program 8 times [2019-10-14 21:42:08,309 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:08,309 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709503299] [2019-10-14 21:42:08,310 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:08,310 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:08,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:08,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-14 21:42:08,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709503299] [2019-10-14 21:42:08,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320080763] [2019-10-14 21:42:08,503 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-10-14 21:42:08,600 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:08,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:08,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:42:08,605 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:08,663 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-14 21:42:08,663 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:08,664 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2019-10-14 21:42:08,664 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836760943] [2019-10-14 21:42:08,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:42:08,665 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:08,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:42:08,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:42:08,665 INFO L87 Difference]: Start difference. First operand 111 states and 127 transitions. Second operand 17 states. [2019-10-14 21:42:08,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:08,962 INFO L93 Difference]: Finished difference Result 268 states and 324 transitions. [2019-10-14 21:42:08,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:42:08,962 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 127 [2019-10-14 21:42:08,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:08,964 INFO L225 Difference]: With dead ends: 268 [2019-10-14 21:42:08,964 INFO L226 Difference]: Without dead ends: 186 [2019-10-14 21:42:08,965 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:42:08,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-10-14 21:42:08,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 113. [2019-10-14 21:42:08,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-10-14 21:42:08,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2019-10-14 21:42:08,982 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 127 [2019-10-14 21:42:08,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:08,982 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2019-10-14 21:42:08,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:42:08,983 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2019-10-14 21:42:08,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-14 21:42:08,984 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:08,984 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:09,188 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:09,188 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:09,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:09,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1447504941, now seen corresponding path program 9 times [2019-10-14 21:42:09,189 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:09,190 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301981535] [2019-10-14 21:42:09,190 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:09,190 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:09,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:09,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:09,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:09,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-14 21:42:09,390 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301981535] [2019-10-14 21:42:09,390 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798859733] [2019-10-14 21:42:09,390 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-10-14 21:42:09,767 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:42:09,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:09,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:42:09,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2019-10-14 21:42:09,868 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:09,868 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 23 [2019-10-14 21:42:09,868 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301367575] [2019-10-14 21:42:09,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 21:42:09,869 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:09,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 21:42:09,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:42:09,870 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand 23 states. [2019-10-14 21:42:10,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:10,504 INFO L93 Difference]: Finished difference Result 292 states and 356 transitions. [2019-10-14 21:42:10,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 21:42:10,504 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 129 [2019-10-14 21:42:10,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:10,508 INFO L225 Difference]: With dead ends: 292 [2019-10-14 21:42:10,508 INFO L226 Difference]: Without dead ends: 210 [2019-10-14 21:42:10,509 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=648, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:42:10,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-10-14 21:42:10,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 124. [2019-10-14 21:42:10,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-10-14 21:42:10,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 142 transitions. [2019-10-14 21:42:10,521 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 142 transitions. Word has length 129 [2019-10-14 21:42:10,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:10,522 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 142 transitions. [2019-10-14 21:42:10,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 21:42:10,522 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 142 transitions. [2019-10-14 21:42:10,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-14 21:42:10,524 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:10,525 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:10,729 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:10,729 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:10,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:10,730 INFO L82 PathProgramCache]: Analyzing trace with hash -927924912, now seen corresponding path program 10 times [2019-10-14 21:42:10,731 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:10,731 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347492101] [2019-10-14 21:42:10,731 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:10,732 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:10,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:10,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:10,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:10,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:10,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:10,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:10,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2019-10-14 21:42:11,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347492101] [2019-10-14 21:42:11,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974122054] [2019-10-14 21:42:11,003 INFO L92 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 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 [2019-10-14 21:42:11,119 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:11,120 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:11,121 INFO L256 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:42:11,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2019-10-14 21:42:11,150 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:11,150 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 19 [2019-10-14 21:42:11,150 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598029462] [2019-10-14 21:42:11,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:42:11,151 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:11,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:42:11,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:42:11,151 INFO L87 Difference]: Start difference. First operand 124 states and 142 transitions. Second operand 19 states. [2019-10-14 21:42:11,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:11,650 INFO L93 Difference]: Finished difference Result 302 states and 366 transitions. [2019-10-14 21:42:11,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:42:11,656 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 148 [2019-10-14 21:42:11,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:11,658 INFO L225 Difference]: With dead ends: 302 [2019-10-14 21:42:11,658 INFO L226 Difference]: Without dead ends: 211 [2019-10-14 21:42:11,659 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:42:11,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-10-14 21:42:11,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 126. [2019-10-14 21:42:11,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-10-14 21:42:11,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 144 transitions. [2019-10-14 21:42:11,670 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 144 transitions. Word has length 148 [2019-10-14 21:42:11,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:11,670 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 144 transitions. [2019-10-14 21:42:11,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:42:11,670 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 144 transitions. [2019-10-14 21:42:11,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-14 21:42:11,673 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:11,674 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:11,877 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:11,878 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:11,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:11,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1140805518, now seen corresponding path program 11 times [2019-10-14 21:42:11,878 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:11,878 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455902075] [2019-10-14 21:42:11,878 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:11,878 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:11,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:12,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:12,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:12,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2019-10-14 21:42:12,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455902075] [2019-10-14 21:42:12,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860178871] [2019-10-14 21:42:12,115 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-10-14 21:42:23,205 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-10-14 21:42:23,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:23,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:42:23,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2019-10-14 21:42:23,245 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:23,246 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 20 [2019-10-14 21:42:23,246 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996929190] [2019-10-14 21:42:23,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:42:23,247 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:23,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:42:23,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:42:23,248 INFO L87 Difference]: Start difference. First operand 126 states and 144 transitions. Second operand 20 states. [2019-10-14 21:42:23,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:23,763 INFO L93 Difference]: Finished difference Result 310 states and 376 transitions. [2019-10-14 21:42:23,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:42:23,764 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 150 [2019-10-14 21:42:23,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:23,766 INFO L225 Difference]: With dead ends: 310 [2019-10-14 21:42:23,766 INFO L226 Difference]: Without dead ends: 219 [2019-10-14 21:42:23,767 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:42:23,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-10-14 21:42:23,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 128. [2019-10-14 21:42:23,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-10-14 21:42:23,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 146 transitions. [2019-10-14 21:42:23,785 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 146 transitions. Word has length 150 [2019-10-14 21:42:23,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:23,785 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 146 transitions. [2019-10-14 21:42:23,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:42:23,786 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 146 transitions. [2019-10-14 21:42:23,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-14 21:42:23,789 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:23,789 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:23,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:23,990 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:23,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:23,990 INFO L82 PathProgramCache]: Analyzing trace with hash 439362324, now seen corresponding path program 12 times [2019-10-14 21:42:23,990 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:23,991 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998742633] [2019-10-14 21:42:23,991 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:23,991 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:23,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:24,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:24,254 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2019-10-14 21:42:24,254 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998742633] [2019-10-14 21:42:24,255 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864549459] [2019-10-14 21:42:24,255 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-10-14 21:42:25,416 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 21:42:25,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:25,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:42:25,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 29 proven. 111 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2019-10-14 21:42:25,585 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:25,585 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 29 [2019-10-14 21:42:25,585 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580514209] [2019-10-14 21:42:25,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-14 21:42:25,586 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:25,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-14 21:42:25,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:42:25,587 INFO L87 Difference]: Start difference. First operand 128 states and 146 transitions. Second operand 29 states. [2019-10-14 21:42:26,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:26,452 INFO L93 Difference]: Finished difference Result 347 states and 426 transitions. [2019-10-14 21:42:26,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-14 21:42:26,452 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 152 [2019-10-14 21:42:26,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:26,454 INFO L225 Difference]: With dead ends: 347 [2019-10-14 21:42:26,454 INFO L226 Difference]: Without dead ends: 256 [2019-10-14 21:42:26,457 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=443, Invalid=963, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 21:42:26,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2019-10-14 21:42:26,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 141. [2019-10-14 21:42:26,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-10-14 21:42:26,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 161 transitions. [2019-10-14 21:42:26,474 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 161 transitions. Word has length 152 [2019-10-14 21:42:26,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:26,474 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 161 transitions. [2019-10-14 21:42:26,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-14 21:42:26,474 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 161 transitions. [2019-10-14 21:42:26,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-14 21:42:26,476 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:26,476 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:26,682 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:26,682 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:26,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:26,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1016744197, now seen corresponding path program 13 times [2019-10-14 21:42:26,683 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:26,684 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464739128] [2019-10-14 21:42:26,684 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:26,684 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:26,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:26,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:26,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:26,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:26,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:27,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2019-10-14 21:42:27,047 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464739128] [2019-10-14 21:42:27,047 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609650888] [2019-10-14 21:42:27,047 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-10-14 21:42:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:27,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 21:42:27,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2019-10-14 21:42:27,315 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:27,315 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 23 [2019-10-14 21:42:27,315 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765785789] [2019-10-14 21:42:27,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 21:42:27,318 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:27,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 21:42:27,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:42:27,319 INFO L87 Difference]: Start difference. First operand 141 states and 161 transitions. Second operand 23 states. [2019-10-14 21:42:28,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:28,104 INFO L93 Difference]: Finished difference Result 352 states and 428 transitions. [2019-10-14 21:42:28,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:42:28,111 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 173 [2019-10-14 21:42:28,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:28,112 INFO L225 Difference]: With dead ends: 352 [2019-10-14 21:42:28,113 INFO L226 Difference]: Without dead ends: 252 [2019-10-14 21:42:28,113 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:42:28,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-10-14 21:42:28,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 143. [2019-10-14 21:42:28,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-10-14 21:42:28,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 163 transitions. [2019-10-14 21:42:28,130 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 163 transitions. Word has length 173 [2019-10-14 21:42:28,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:28,130 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 163 transitions. [2019-10-14 21:42:28,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 21:42:28,131 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 163 transitions. [2019-10-14 21:42:28,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-14 21:42:28,133 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:28,133 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:28,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:28,339 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:28,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:28,339 INFO L82 PathProgramCache]: Analyzing trace with hash -2077818845, now seen corresponding path program 14 times [2019-10-14 21:42:28,340 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:28,340 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635910268] [2019-10-14 21:42:28,340 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:28,340 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:28,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:28,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:28,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:28,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:28,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2019-10-14 21:42:28,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635910268] [2019-10-14 21:42:28,724 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969496208] [2019-10-14 21:42:28,724 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-10-14 21:42:28,911 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:28,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:28,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-14 21:42:28,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:29,015 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2019-10-14 21:42:29,016 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:29,016 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 24 [2019-10-14 21:42:29,016 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560333911] [2019-10-14 21:42:29,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:42:29,017 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:29,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:42:29,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:42:29,018 INFO L87 Difference]: Start difference. First operand 143 states and 163 transitions. Second operand 24 states. [2019-10-14 21:42:29,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:29,573 INFO L93 Difference]: Finished difference Result 360 states and 438 transitions. [2019-10-14 21:42:29,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 21:42:29,576 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 175 [2019-10-14 21:42:29,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:29,578 INFO L225 Difference]: With dead ends: 360 [2019-10-14 21:42:29,578 INFO L226 Difference]: Without dead ends: 260 [2019-10-14 21:42:29,579 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=388, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:42:29,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-10-14 21:42:29,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 145. [2019-10-14 21:42:29,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-10-14 21:42:29,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 165 transitions. [2019-10-14 21:42:29,596 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 165 transitions. Word has length 175 [2019-10-14 21:42:29,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:29,597 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 165 transitions. [2019-10-14 21:42:29,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:42:29,597 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 165 transitions. [2019-10-14 21:42:29,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-14 21:42:29,599 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:29,600 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:29,804 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:29,804 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:29,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:29,805 INFO L82 PathProgramCache]: Analyzing trace with hash 459433921, now seen corresponding path program 15 times [2019-10-14 21:42:29,805 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:29,805 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545064837] [2019-10-14 21:42:29,806 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:29,806 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:29,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,148 INFO L134 CoverageAnalysis]: Checked inductivity of 726 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2019-10-14 21:42:30,148 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545064837] [2019-10-14 21:42:30,149 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515172014] [2019-10-14 21:42:30,149 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-10-14 21:42:31,103 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-14 21:42:31,103 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:31,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:42:31,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 726 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2019-10-14 21:42:31,332 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:31,332 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 10] total 32 [2019-10-14 21:42:31,332 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002032624] [2019-10-14 21:42:31,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 21:42:31,337 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:31,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 21:42:31,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=713, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:42:31,338 INFO L87 Difference]: Start difference. First operand 145 states and 165 transitions. Second operand 32 states. [2019-10-14 21:42:32,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:32,548 INFO L93 Difference]: Finished difference Result 384 states and 470 transitions. [2019-10-14 21:42:32,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 21:42:32,549 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 177 [2019-10-14 21:42:32,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:32,551 INFO L225 Difference]: With dead ends: 384 [2019-10-14 21:42:32,551 INFO L226 Difference]: Without dead ends: 284 [2019-10-14 21:42:32,552 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=546, Invalid=1176, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 21:42:32,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2019-10-14 21:42:32,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 156. [2019-10-14 21:42:32,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-10-14 21:42:32,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 178 transitions. [2019-10-14 21:42:32,576 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 178 transitions. Word has length 177 [2019-10-14 21:42:32,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:32,576 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 178 transitions. [2019-10-14 21:42:32,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 21:42:32,576 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 178 transitions. [2019-10-14 21:42:32,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-10-14 21:42:32,579 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:32,579 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:32,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:32,785 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:32,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:32,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1872656478, now seen corresponding path program 16 times [2019-10-14 21:42:32,786 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:32,786 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426436278] [2019-10-14 21:42:32,786 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:32,787 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:32,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2019-10-14 21:42:33,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426436278] [2019-10-14 21:42:33,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527609241] [2019-10-14 21:42:33,177 INFO L92 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 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 [2019-10-14 21:42:33,374 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:33,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:33,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:42:33,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2019-10-14 21:42:33,415 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:33,416 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 26 [2019-10-14 21:42:33,416 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138791043] [2019-10-14 21:42:33,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 21:42:33,417 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:33,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 21:42:33,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:42:33,417 INFO L87 Difference]: Start difference. First operand 156 states and 178 transitions. Second operand 26 states. [2019-10-14 21:42:34,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:34,244 INFO L93 Difference]: Finished difference Result 394 states and 480 transitions. [2019-10-14 21:42:34,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:42:34,245 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 196 [2019-10-14 21:42:34,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:34,247 INFO L225 Difference]: With dead ends: 394 [2019-10-14 21:42:34,247 INFO L226 Difference]: Without dead ends: 285 [2019-10-14 21:42:34,248 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:42:34,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2019-10-14 21:42:34,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 158. [2019-10-14 21:42:34,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-10-14 21:42:34,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 180 transitions. [2019-10-14 21:42:34,273 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 180 transitions. Word has length 196 [2019-10-14 21:42:34,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:34,274 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 180 transitions. [2019-10-14 21:42:34,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 21:42:34,274 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 180 transitions. [2019-10-14 21:42:34,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-10-14 21:42:34,276 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:34,277 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:34,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:34,481 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:34,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:34,481 INFO L82 PathProgramCache]: Analyzing trace with hash 816164548, now seen corresponding path program 17 times [2019-10-14 21:42:34,481 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:34,481 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751984375] [2019-10-14 21:42:34,481 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:34,482 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:34,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:35,011 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2019-10-14 21:42:35,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751984375] [2019-10-14 21:42:35,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831593591] [2019-10-14 21:42:35,012 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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