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/sorting_selectionsort_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:42:36,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:42:36,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:42:36,795 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:42:36,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:42:36,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:42:36,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:42:36,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:42:36,802 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:42:36,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:42:36,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:42:36,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:42:36,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:42:36,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:42:36,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:42:36,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:42:36,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:42:36,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:42:36,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:42:36,814 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:42:36,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:42:36,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:42:36,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:42:36,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:42:36,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:42:36,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:42:36,827 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:42:36,829 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:42:36,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:42:36,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:42:36,831 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:42:36,832 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:42:36,832 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:42:36,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:42:36,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:42:36,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:42:36,838 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 21:42:36,860 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:42:36,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:42:36,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:42:36,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:42:36,863 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:42:36,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:42:36,864 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:42:36,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:42:36,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:42:36,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:42:36,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:42:36,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:42:36,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:42:36,866 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:42:36,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:42:36,866 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:42:36,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:42:36,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:42:36,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:42:36,867 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:42:36,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:42:36,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:42:36,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:42:36,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:42:36,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:42:36,869 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:42:36,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:42:36,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:42:36,869 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:42:37,135 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:42:37,147 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:42:37,150 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:42:37,152 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:42:37,152 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:42:37,153 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-2.i [2019-10-14 21:42:37,226 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd03d98ec/f8d720b9e28844ae8c382ca4e547db16/FLAGa9b733cd6 [2019-10-14 21:42:37,713 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:42:37,714 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-2.i [2019-10-14 21:42:37,720 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd03d98ec/f8d720b9e28844ae8c382ca4e547db16/FLAGa9b733cd6 [2019-10-14 21:42:38,070 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd03d98ec/f8d720b9e28844ae8c382ca4e547db16 [2019-10-14 21:42:38,080 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:42:38,081 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:42:38,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:42:38,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:42:38,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:42:38,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:42:38" (1/1) ... [2019-10-14 21:42:38,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38b6abea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:38, skipping insertion in model container [2019-10-14 21:42:38,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:42:38" (1/1) ... [2019-10-14 21:42:38,098 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:42:38,118 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:42:38,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:42:38,338 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:42:38,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:42:38,466 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:42:38,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:38 WrapperNode [2019-10-14 21:42:38,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:42:38,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:42:38,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:42:38,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:42:38,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:38" (1/1) ... [2019-10-14 21:42:38,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:38" (1/1) ... [2019-10-14 21:42:38,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:38" (1/1) ... [2019-10-14 21:42:38,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:38" (1/1) ... [2019-10-14 21:42:38,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:38" (1/1) ... [2019-10-14 21:42:38,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:38" (1/1) ... [2019-10-14 21:42:38,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:38" (1/1) ... [2019-10-14 21:42:38,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:42:38,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:42:38,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:42:38,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:42:38,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:38" (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 21:42:38,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:42:38,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:42:38,585 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:42:38,585 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:42:38,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:42:38,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:42:38,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:42:38,586 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:42:38,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:42:38,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:42:38,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:42:38,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:42:38,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:42:38,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:42:38,923 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:42:38,923 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-14 21:42:38,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:42:38 BoogieIcfgContainer [2019-10-14 21:42:38,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:42:38,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:42:38,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:42:38,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:42:38,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:42:38" (1/3) ... [2019-10-14 21:42:38,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23954c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:42:38, skipping insertion in model container [2019-10-14 21:42:38,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:38" (2/3) ... [2019-10-14 21:42:38,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23954c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:42:38, skipping insertion in model container [2019-10-14 21:42:38,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:42:38" (3/3) ... [2019-10-14 21:42:38,935 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-2.i [2019-10-14 21:42:38,957 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:42:38,967 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:42:38,977 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:42:39,002 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:42:39,002 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:42:39,003 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:42:39,003 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:42:39,003 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:42:39,003 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:42:39,003 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:42:39,003 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:42:39,023 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2019-10-14 21:42:39,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:42:39,029 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:39,030 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:39,032 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:39,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:39,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1156372912, now seen corresponding path program 1 times [2019-10-14 21:42:39,044 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:39,044 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617488283] [2019-10-14 21:42:39,044 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:39,045 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:39,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:39,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:39,227 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 21:42:39,228 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617488283] [2019-10-14 21:42:39,229 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:39,229 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:42:39,229 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899356110] [2019-10-14 21:42:39,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:42:39,235 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:39,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:42:39,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:42:39,253 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2019-10-14 21:42:39,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:39,473 INFO L93 Difference]: Finished difference Result 82 states and 123 transitions. [2019-10-14 21:42:39,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:42:39,475 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-14 21:42:39,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:39,487 INFO L225 Difference]: With dead ends: 82 [2019-10-14 21:42:39,487 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 21:42:39,494 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:42:39,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 21:42:39,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-14 21:42:39,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 21:42:39,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2019-10-14 21:42:39,564 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 16 [2019-10-14 21:42:39,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:39,566 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2019-10-14 21:42:39,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:42:39,567 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2019-10-14 21:42:39,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:42:39,572 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:39,572 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:39,573 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:39,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:39,574 INFO L82 PathProgramCache]: Analyzing trace with hash -2078459264, now seen corresponding path program 1 times [2019-10-14 21:42:39,574 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:39,575 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667827379] [2019-10-14 21:42:39,575 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:39,576 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:39,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:39,692 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 21:42:39,696 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667827379] [2019-10-14 21:42:39,696 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:39,697 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:42:39,697 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131252222] [2019-10-14 21:42:39,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:39,702 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:39,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:39,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:39,703 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 4 states. [2019-10-14 21:42:39,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:39,829 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2019-10-14 21:42:39,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:39,830 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-14 21:42:39,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:39,831 INFO L225 Difference]: With dead ends: 74 [2019-10-14 21:42:39,832 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 21:42:39,833 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 21:42:39,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 21:42:39,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-14 21:42:39,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:42:39,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2019-10-14 21:42:39,842 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 16 [2019-10-14 21:42:39,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:39,842 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2019-10-14 21:42:39,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:39,842 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2019-10-14 21:42:39,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 21:42:39,843 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:39,843 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:39,844 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:39,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:39,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1609541534, now seen corresponding path program 1 times [2019-10-14 21:42:39,845 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:39,845 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685728754] [2019-10-14 21:42:39,845 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:39,845 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:39,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:39,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:39,904 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685728754] [2019-10-14 21:42:39,904 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:39,905 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:42:39,905 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715522971] [2019-10-14 21:42:39,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:39,906 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:39,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:39,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:39,907 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand 4 states. [2019-10-14 21:42:40,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:40,063 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2019-10-14 21:42:40,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:40,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-14 21:42:40,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:40,065 INFO L225 Difference]: With dead ends: 72 [2019-10-14 21:42:40,065 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 21:42:40,066 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 21:42:40,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 21:42:40,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2019-10-14 21:42:40,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-14 21:42:40,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2019-10-14 21:42:40,090 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 18 [2019-10-14 21:42:40,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:40,090 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2019-10-14 21:42:40,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:40,091 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2019-10-14 21:42:40,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:42:40,092 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:40,092 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:40,092 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:40,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:40,093 INFO L82 PathProgramCache]: Analyzing trace with hash -898844059, now seen corresponding path program 1 times [2019-10-14 21:42:40,093 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:40,093 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768627697] [2019-10-14 21:42:40,093 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:40,094 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:40,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:40,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:40,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768627697] [2019-10-14 21:42:40,152 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:40,154 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:42:40,155 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767040801] [2019-10-14 21:42:40,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:40,155 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:40,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:40,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:40,156 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 4 states. [2019-10-14 21:42:40,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:40,296 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2019-10-14 21:42:40,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:40,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-14 21:42:40,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:40,298 INFO L225 Difference]: With dead ends: 90 [2019-10-14 21:42:40,298 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 21:42:40,299 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 21:42:40,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 21:42:40,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2019-10-14 21:42:40,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:42:40,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2019-10-14 21:42:40,307 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 20 [2019-10-14 21:42:40,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:40,307 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2019-10-14 21:42:40,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:40,307 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2019-10-14 21:42:40,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:42:40,308 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:40,309 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:40,309 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:40,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:40,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1708190685, now seen corresponding path program 1 times [2019-10-14 21:42:40,310 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:40,310 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382729193] [2019-10-14 21:42:40,310 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:40,310 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:40,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:40,401 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 21:42:40,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382729193] [2019-10-14 21:42:40,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956865324] [2019-10-14 21:42:40,402 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 21:42:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:40,464 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:42:40,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:40,515 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 21:42:40,515 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:40,515 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:42:40,516 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336790477] [2019-10-14 21:42:40,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:42:40,517 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:40,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:42:40,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:42:40,517 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 6 states. [2019-10-14 21:42:40,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:40,623 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2019-10-14 21:42:40,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:42:40,624 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-10-14 21:42:40,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:40,625 INFO L225 Difference]: With dead ends: 86 [2019-10-14 21:42:40,625 INFO L226 Difference]: Without dead ends: 49 [2019-10-14 21:42:40,626 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 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 21:42:40,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-14 21:42:40,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-10-14 21:42:40,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-14 21:42:40,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2019-10-14 21:42:40,633 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 20 [2019-10-14 21:42:40,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:40,633 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2019-10-14 21:42:40,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:42:40,633 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2019-10-14 21:42:40,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:42:40,634 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:40,634 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] [2019-10-14 21:42:40,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:40,838 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:40,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:40,839 INFO L82 PathProgramCache]: Analyzing trace with hash 700215557, now seen corresponding path program 2 times [2019-10-14 21:42:40,839 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:40,839 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105457459] [2019-10-14 21:42:40,839 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:40,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:40,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:40,922 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 21:42:40,922 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105457459] [2019-10-14 21:42:40,923 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648267297] [2019-10-14 21:42:40,923 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 21:42:40,967 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 21:42:40,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:40,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:42:40,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:40,989 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 21:42:40,990 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:42:40,990 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2019-10-14 21:42:40,990 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472694009] [2019-10-14 21:42:40,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:40,991 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:40,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:40,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:42:40,992 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand 4 states. [2019-10-14 21:42:41,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:41,061 INFO L93 Difference]: Finished difference Result 108 states and 145 transitions. [2019-10-14 21:42:41,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:41,062 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-10-14 21:42:41,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:41,063 INFO L225 Difference]: With dead ends: 108 [2019-10-14 21:42:41,063 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 21:42:41,064 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:42:41,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 21:42:41,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 49. [2019-10-14 21:42:41,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 21:42:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2019-10-14 21:42:41,070 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 22 [2019-10-14 21:42:41,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:41,071 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2019-10-14 21:42:41,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:41,071 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2019-10-14 21:42:41,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:42:41,072 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:41,072 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] [2019-10-14 21:42:41,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:41,277 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:41,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:41,277 INFO L82 PathProgramCache]: Analyzing trace with hash -159559916, now seen corresponding path program 1 times [2019-10-14 21:42:41,277 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:41,277 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410609902] [2019-10-14 21:42:41,278 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,278 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:41,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410609902] [2019-10-14 21:42:41,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669414331] [2019-10-14 21:42:41,357 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 21:42:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,404 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:42:41,411 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:41,429 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:41,429 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:42:41,430 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117326959] [2019-10-14 21:42:41,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:42:41,430 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:41,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:42:41,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:42:41,431 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand 7 states. [2019-10-14 21:42:41,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:41,549 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2019-10-14 21:42:41,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:42:41,550 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-10-14 21:42:41,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:41,551 INFO L225 Difference]: With dead ends: 90 [2019-10-14 21:42:41,551 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 21:42:41,552 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:42:41,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 21:42:41,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-10-14 21:42:41,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 21:42:41,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2019-10-14 21:42:41,570 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 25 [2019-10-14 21:42:41,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:41,570 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2019-10-14 21:42:41,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:42:41,571 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2019-10-14 21:42:41,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:42:41,572 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:41,573 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] [2019-10-14 21:42:41,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:41,780 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:41,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:41,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1768902798, now seen corresponding path program 2 times [2019-10-14 21:42:41,781 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:41,781 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813123425] [2019-10-14 21:42:41,781 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,781 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:41,854 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813123425] [2019-10-14 21:42:41,864 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447291985] [2019-10-14 21:42:41,865 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 21:42:41,907 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 21:42:41,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:41,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:42:41,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:42:41,937 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:42:41,938 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2019-10-14 21:42:41,938 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927542631] [2019-10-14 21:42:41,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:41,939 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:41,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:41,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:42:41,940 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 4 states. [2019-10-14 21:42:41,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:41,991 INFO L93 Difference]: Finished difference Result 102 states and 135 transitions. [2019-10-14 21:42:41,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:41,992 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-10-14 21:42:41,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:41,993 INFO L225 Difference]: With dead ends: 102 [2019-10-14 21:42:41,993 INFO L226 Difference]: Without dead ends: 67 [2019-10-14 21:42:41,994 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:42:41,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-14 21:42:42,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2019-10-14 21:42:42,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 21:42:42,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 79 transitions. [2019-10-14 21:42:42,006 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 79 transitions. Word has length 27 [2019-10-14 21:42:42,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:42,007 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 79 transitions. [2019-10-14 21:42:42,007 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:42,007 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 79 transitions. [2019-10-14 21:42:42,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 21:42:42,013 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:42,013 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] [2019-10-14 21:42:42,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:42,217 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:42,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:42,218 INFO L82 PathProgramCache]: Analyzing trace with hash -485006498, now seen corresponding path program 1 times [2019-10-14 21:42:42,218 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:42,218 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818755593] [2019-10-14 21:42:42,218 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:42,218 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:42,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:42,316 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818755593] [2019-10-14 21:42:42,316 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806878630] [2019-10-14 21:42:42,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:42:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,374 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:42:42,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:42,393 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:42,393 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:42:42,393 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001631060] [2019-10-14 21:42:42,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:42:42,394 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:42,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:42:42,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:42:42,395 INFO L87 Difference]: Start difference. First operand 61 states and 79 transitions. Second operand 8 states. [2019-10-14 21:42:42,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:42,502 INFO L93 Difference]: Finished difference Result 112 states and 148 transitions. [2019-10-14 21:42:42,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:42:42,503 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2019-10-14 21:42:42,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:42,504 INFO L225 Difference]: With dead ends: 112 [2019-10-14 21:42:42,504 INFO L226 Difference]: Without dead ends: 64 [2019-10-14 21:42:42,505 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:42:42,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-14 21:42:42,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2019-10-14 21:42:42,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-14 21:42:42,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2019-10-14 21:42:42,515 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 28 [2019-10-14 21:42:42,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:42,515 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2019-10-14 21:42:42,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:42:42,516 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2019-10-14 21:42:42,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:42:42,519 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:42,519 INFO L380 BasicCegarLoop]: trace histogram [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 21:42:42,719 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:42,720 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:42,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:42,721 INFO L82 PathProgramCache]: Analyzing trace with hash 301121088, now seen corresponding path program 2 times [2019-10-14 21:42:42,721 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:42,722 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343463991] [2019-10-14 21:42:42,722 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:42,722 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:42,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:42,793 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343463991] [2019-10-14 21:42:42,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866801977] [2019-10-14 21:42:42,794 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 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 21:42:42,840 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 21:42:42,840 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:42,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:42:42,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:42,941 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:42,942 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 59 [2019-10-14 21:42:42,943 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:42,949 INFO L567 ElimStorePlain]: treesize reduction 25, result has 30.6 percent of original size [2019-10-14 21:42:42,949 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:42:42,949 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:1 [2019-10-14 21:42:42,968 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2019-10-14 21:42:42,968 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:42,970 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:42,971 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:42:42,971 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:23, output treesize:3 [2019-10-14 21:42:42,982 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-14 21:42:43,011 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:42:43,011 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2019-10-14 21:42:43,012 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753161032] [2019-10-14 21:42:43,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:42:43,016 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:43,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:42:43,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:42:43,016 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand 6 states. [2019-10-14 21:42:43,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:43,109 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2019-10-14 21:42:43,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:42:43,109 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-10-14 21:42:43,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:43,110 INFO L225 Difference]: With dead ends: 74 [2019-10-14 21:42:43,110 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 21:42:43,111 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:42:43,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 21:42:43,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2019-10-14 21:42:43,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-14 21:42:43,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 88 transitions. [2019-10-14 21:42:43,117 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 88 transitions. Word has length 30 [2019-10-14 21:42:43,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:43,117 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 88 transitions. [2019-10-14 21:42:43,118 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:42:43,118 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 88 transitions. [2019-10-14 21:42:43,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 21:42:43,119 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:43,119 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 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 21:42:43,323 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:43,324 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:43,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:43,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1931635784, now seen corresponding path program 1 times [2019-10-14 21:42:43,325 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:43,326 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468149665] [2019-10-14 21:42:43,326 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:43,326 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:43,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-14 21:42:43,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468149665] [2019-10-14 21:42:43,381 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:43,381 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 21:42:43,382 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113165310] [2019-10-14 21:42:43,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:42:43,382 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:43,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:42:43,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:42:43,383 INFO L87 Difference]: Start difference. First operand 69 states and 88 transitions. Second operand 5 states. [2019-10-14 21:42:43,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:43,524 INFO L93 Difference]: Finished difference Result 133 states and 174 transitions. [2019-10-14 21:42:43,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:42:43,525 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2019-10-14 21:42:43,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:43,527 INFO L225 Difference]: With dead ends: 133 [2019-10-14 21:42:43,527 INFO L226 Difference]: Without dead ends: 92 [2019-10-14 21:42:43,528 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 21:42:43,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-14 21:42:43,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2019-10-14 21:42:43,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 21:42:43,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 90 transitions. [2019-10-14 21:42:43,537 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 90 transitions. Word has length 35 [2019-10-14 21:42:43,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:43,537 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 90 transitions. [2019-10-14 21:42:43,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:42:43,537 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 90 transitions. [2019-10-14 21:42:43,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 21:42:43,538 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:43,538 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 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 21:42:43,539 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:43,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:43,539 INFO L82 PathProgramCache]: Analyzing trace with hash 210042451, now seen corresponding path program 1 times [2019-10-14 21:42:43,539 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:43,539 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653244129] [2019-10-14 21:42:43,539 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:43,540 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:43,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-14 21:42:43,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653244129] [2019-10-14 21:42:43,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551966327] [2019-10-14 21:42:43,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:43,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:42:43,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:42:43,713 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:43,713 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2019-10-14 21:42:43,713 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406614217] [2019-10-14 21:42:43,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:42:43,714 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:43,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:42:43,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:42:43,714 INFO L87 Difference]: Start difference. First operand 71 states and 90 transitions. Second operand 11 states. [2019-10-14 21:42:43,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:43,957 INFO L93 Difference]: Finished difference Result 145 states and 191 transitions. [2019-10-14 21:42:43,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:42:43,958 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2019-10-14 21:42:43,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:43,960 INFO L225 Difference]: With dead ends: 145 [2019-10-14 21:42:43,960 INFO L226 Difference]: Without dead ends: 89 [2019-10-14 21:42:43,961 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:42:43,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-14 21:42:43,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2019-10-14 21:42:43,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-10-14 21:42:43,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 98 transitions. [2019-10-14 21:42:43,968 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 98 transitions. Word has length 38 [2019-10-14 21:42:43,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:43,968 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 98 transitions. [2019-10-14 21:42:43,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:42:43,968 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 98 transitions. [2019-10-14 21:42:43,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 21:42:43,969 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:43,970 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 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] [2019-10-14 21:42:44,173 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:44,174 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:44,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:44,175 INFO L82 PathProgramCache]: Analyzing trace with hash 250442742, now seen corresponding path program 2 times [2019-10-14 21:42:44,175 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:44,175 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059550462] [2019-10-14 21:42:44,176 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:44,176 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:44,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:44,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:44,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:44,268 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-14 21:42:44,269 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059550462] [2019-10-14 21:42:44,271 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826097844] [2019-10-14 21:42:44,271 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 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 21:42:44,319 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:44,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:44,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:42:44,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:42:44,378 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:44,378 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-10-14 21:42:44,378 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309790781] [2019-10-14 21:42:44,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:42:44,379 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:44,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:42:44,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:42:44,380 INFO L87 Difference]: Start difference. First operand 78 states and 98 transitions. Second operand 14 states. [2019-10-14 21:42:44,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:44,943 INFO L93 Difference]: Finished difference Result 286 states and 395 transitions. [2019-10-14 21:42:44,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:42:44,943 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2019-10-14 21:42:44,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:44,945 INFO L225 Difference]: With dead ends: 286 [2019-10-14 21:42:44,945 INFO L226 Difference]: Without dead ends: 221 [2019-10-14 21:42:44,946 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:42:44,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-10-14 21:42:44,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 123. [2019-10-14 21:42:44,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-10-14 21:42:44,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 166 transitions. [2019-10-14 21:42:44,958 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 166 transitions. Word has length 43 [2019-10-14 21:42:44,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:44,959 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 166 transitions. [2019-10-14 21:42:44,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:42:44,959 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 166 transitions. [2019-10-14 21:42:44,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-14 21:42:44,960 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:44,960 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:45,168 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:45,169 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:45,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:45,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1573963401, now seen corresponding path program 3 times [2019-10-14 21:42:45,170 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:45,171 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638115635] [2019-10-14 21:42:45,171 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,171 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-14 21:42:45,276 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638115635] [2019-10-14 21:42:45,276 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17500805] [2019-10-14 21:42:45,276 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 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 21:42:45,324 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 21:42:45,325 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:45,326 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:42:45,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-14 21:42:45,408 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:45,408 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2019-10-14 21:42:45,408 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964226286] [2019-10-14 21:42:45,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:42:45,409 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:45,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:42:45,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:42:45,410 INFO L87 Difference]: Start difference. First operand 123 states and 166 transitions. Second operand 14 states. [2019-10-14 21:42:46,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:46,197 INFO L93 Difference]: Finished difference Result 407 states and 579 transitions. [2019-10-14 21:42:46,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 21:42:46,197 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2019-10-14 21:42:46,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:46,200 INFO L225 Difference]: With dead ends: 407 [2019-10-14 21:42:46,200 INFO L226 Difference]: Without dead ends: 323 [2019-10-14 21:42:46,201 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:42:46,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2019-10-14 21:42:46,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 135. [2019-10-14 21:42:46,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-10-14 21:42:46,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 184 transitions. [2019-10-14 21:42:46,218 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 184 transitions. Word has length 48 [2019-10-14 21:42:46,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:46,218 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 184 transitions. [2019-10-14 21:42:46,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:42:46,219 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 184 transitions. [2019-10-14 21:42:46,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 21:42:46,219 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:46,219 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:46,422 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:46,423 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:46,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:46,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1345507828, now seen corresponding path program 4 times [2019-10-14 21:42:46,424 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:46,424 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277755461] [2019-10-14 21:42:46,424 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:46,425 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:46,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-14 21:42:46,529 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277755461] [2019-10-14 21:42:46,529 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786550184] [2019-10-14 21:42:46,529 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 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 21:42:46,578 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:46,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:46,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:42:46,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-14 21:42:46,681 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:46,681 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2019-10-14 21:42:46,681 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750897690] [2019-10-14 21:42:46,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:42:46,682 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:46,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:42:46,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:42:46,683 INFO L87 Difference]: Start difference. First operand 135 states and 184 transitions. Second operand 17 states. [2019-10-14 21:42:47,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:47,407 INFO L93 Difference]: Finished difference Result 501 states and 714 transitions. [2019-10-14 21:42:47,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:42:47,407 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2019-10-14 21:42:47,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:47,411 INFO L225 Difference]: With dead ends: 501 [2019-10-14 21:42:47,412 INFO L226 Difference]: Without dead ends: 381 [2019-10-14 21:42:47,412 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:42:47,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2019-10-14 21:42:47,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 149. [2019-10-14 21:42:47,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-10-14 21:42:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 204 transitions. [2019-10-14 21:42:47,431 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 204 transitions. Word has length 51 [2019-10-14 21:42:47,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:47,432 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 204 transitions. [2019-10-14 21:42:47,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:42:47,432 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 204 transitions. [2019-10-14 21:42:47,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:42:47,433 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:47,433 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:47,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:47,642 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:47,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:47,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1590644551, now seen corresponding path program 5 times [2019-10-14 21:42:47,643 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:47,643 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822415519] [2019-10-14 21:42:47,643 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:47,643 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:47,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:47,754 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-14 21:42:47,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822415519] [2019-10-14 21:42:47,755 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274776682] [2019-10-14 21:42:47,755 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 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 21:42:47,863 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-10-14 21:42:47,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:47,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:42:47,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:47,956 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-14 21:42:47,956 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:47,956 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-10-14 21:42:47,957 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131836460] [2019-10-14 21:42:47,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:42:47,957 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:47,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:42:47,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:42:47,958 INFO L87 Difference]: Start difference. First operand 149 states and 204 transitions. Second operand 18 states. [2019-10-14 21:42:48,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:48,311 INFO L93 Difference]: Finished difference Result 296 states and 415 transitions. [2019-10-14 21:42:48,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:42:48,312 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 56 [2019-10-14 21:42:48,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:48,313 INFO L225 Difference]: With dead ends: 296 [2019-10-14 21:42:48,313 INFO L226 Difference]: Without dead ends: 168 [2019-10-14 21:42:48,314 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:42:48,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-10-14 21:42:48,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 157. [2019-10-14 21:42:48,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-10-14 21:42:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 214 transitions. [2019-10-14 21:42:48,326 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 214 transitions. Word has length 56 [2019-10-14 21:42:48,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:48,326 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 214 transitions. [2019-10-14 21:42:48,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:42:48,327 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 214 transitions. [2019-10-14 21:42:48,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-14 21:42:48,327 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:48,327 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:48,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:48,532 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:48,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:48,532 INFO L82 PathProgramCache]: Analyzing trace with hash -2103851952, now seen corresponding path program 6 times [2019-10-14 21:42:48,533 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:48,533 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938404343] [2019-10-14 21:42:48,533 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:48,534 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:48,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:48,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-14 21:42:48,693 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938404343] [2019-10-14 21:42:48,693 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975843869] [2019-10-14 21:42:48,693 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 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 21:42:48,798 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-14 21:42:48,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:48,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 21:42:48,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:48,931 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 15 proven. 51 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-14 21:42:48,931 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:48,931 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2019-10-14 21:42:48,932 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309770483] [2019-10-14 21:42:48,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:42:48,932 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:48,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:42:48,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:42:48,933 INFO L87 Difference]: Start difference. First operand 157 states and 214 transitions. Second operand 21 states. [2019-10-14 21:42:49,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:49,246 INFO L93 Difference]: Finished difference Result 269 states and 378 transitions. [2019-10-14 21:42:49,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:42:49,247 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2019-10-14 21:42:49,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:49,249 INFO L225 Difference]: With dead ends: 269 [2019-10-14 21:42:49,249 INFO L226 Difference]: Without dead ends: 173 [2019-10-14 21:42:49,250 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=256, Invalid=614, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:42:49,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-10-14 21:42:49,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 163. [2019-10-14 21:42:49,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-10-14 21:42:49,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 222 transitions. [2019-10-14 21:42:49,262 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 222 transitions. Word has length 61 [2019-10-14 21:42:49,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:49,262 INFO L462 AbstractCegarLoop]: Abstraction has 163 states and 222 transitions. [2019-10-14 21:42:49,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:42:49,263 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 222 transitions. [2019-10-14 21:42:49,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-14 21:42:49,263 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:49,263 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:49,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:49,468 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:49,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:49,468 INFO L82 PathProgramCache]: Analyzing trace with hash -559502213, now seen corresponding path program 7 times [2019-10-14 21:42:49,468 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:49,468 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970130800] [2019-10-14 21:42:49,468 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:49,469 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:49,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-14 21:42:49,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970130800] [2019-10-14 21:42:49,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167961059] [2019-10-14 21:42:49,601 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 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 21:42:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:42:49,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-14 21:42:49,799 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:49,799 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2019-10-14 21:42:49,799 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536566213] [2019-10-14 21:42:49,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:42:49,800 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:49,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:42:49,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:42:49,800 INFO L87 Difference]: Start difference. First operand 163 states and 222 transitions. Second operand 22 states. [2019-10-14 21:42:51,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:51,014 INFO L93 Difference]: Finished difference Result 760 states and 1094 transitions. [2019-10-14 21:42:51,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-14 21:42:51,014 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2019-10-14 21:42:51,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:51,018 INFO L225 Difference]: With dead ends: 760 [2019-10-14 21:42:51,018 INFO L226 Difference]: Without dead ends: 616 [2019-10-14 21:42:51,019 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=1080, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 21:42:51,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2019-10-14 21:42:51,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 189. [2019-10-14 21:42:51,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-10-14 21:42:51,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 262 transitions. [2019-10-14 21:42:51,044 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 262 transitions. Word has length 64 [2019-10-14 21:42:51,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:51,045 INFO L462 AbstractCegarLoop]: Abstraction has 189 states and 262 transitions. [2019-10-14 21:42:51,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:42:51,045 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 262 transitions. [2019-10-14 21:42:51,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-14 21:42:51,046 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:51,046 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:51,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:51,257 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:51,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:51,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1887853390, now seen corresponding path program 8 times [2019-10-14 21:42:51,258 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:51,258 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708850] [2019-10-14 21:42:51,258 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:51,258 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:51,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-14 21:42:51,408 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708850] [2019-10-14 21:42:51,408 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853700511] [2019-10-14 21:42:51,409 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 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 21:42:51,473 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:51,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:51,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:42:51,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-10-14 21:42:51,583 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:51,583 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2019-10-14 21:42:51,583 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232548453] [2019-10-14 21:42:51,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 21:42:51,597 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:51,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 21:42:51,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:42:51,597 INFO L87 Difference]: Start difference. First operand 189 states and 262 transitions. Second operand 23 states. [2019-10-14 21:42:51,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:51,997 INFO L93 Difference]: Finished difference Result 372 states and 527 transitions. [2019-10-14 21:42:51,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:42:51,998 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2019-10-14 21:42:51,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:52,000 INFO L225 Difference]: With dead ends: 372 [2019-10-14 21:42:52,000 INFO L226 Difference]: Without dead ends: 208 [2019-10-14 21:42:52,001 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 21:42:52,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-10-14 21:42:52,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 197. [2019-10-14 21:42:52,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2019-10-14 21:42:52,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 272 transitions. [2019-10-14 21:42:52,016 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 272 transitions. Word has length 69 [2019-10-14 21:42:52,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:52,017 INFO L462 AbstractCegarLoop]: Abstraction has 197 states and 272 transitions. [2019-10-14 21:42:52,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 21:42:52,017 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 272 transitions. [2019-10-14 21:42:52,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-14 21:42:52,018 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:52,018 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:52,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:52,223 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:52,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:52,224 INFO L82 PathProgramCache]: Analyzing trace with hash -158999393, now seen corresponding path program 9 times [2019-10-14 21:42:52,224 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:52,224 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069419109] [2019-10-14 21:42:52,224 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:52,224 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:52,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:52,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-14 21:42:52,405 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069419109] [2019-10-14 21:42:52,405 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281466777] [2019-10-14 21:42:52,406 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 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 21:42:52,562 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-14 21:42:52,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:52,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:42:52,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2019-10-14 21:42:52,791 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:52,791 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2019-10-14 21:42:52,794 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943408548] [2019-10-14 21:42:52,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:42:52,796 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:52,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:42:52,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:42:52,797 INFO L87 Difference]: Start difference. First operand 197 states and 272 transitions. Second operand 25 states. [2019-10-14 21:42:53,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:53,092 INFO L93 Difference]: Finished difference Result 327 states and 466 transitions. [2019-10-14 21:42:53,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:42:53,092 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 74 [2019-10-14 21:42:53,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:53,094 INFO L225 Difference]: With dead ends: 327 [2019-10-14 21:42:53,095 INFO L226 Difference]: Without dead ends: 213 [2019-10-14 21:42:53,095 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:42:53,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-10-14 21:42:53,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 203. [2019-10-14 21:42:53,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-10-14 21:42:53,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 280 transitions. [2019-10-14 21:42:53,108 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 280 transitions. Word has length 74 [2019-10-14 21:42:53,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:53,109 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 280 transitions. [2019-10-14 21:42:53,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:42:53,109 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 280 transitions. [2019-10-14 21:42:53,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-14 21:42:53,110 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:53,110 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:53,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:53,314 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:53,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:53,315 INFO L82 PathProgramCache]: Analyzing trace with hash -565740084, now seen corresponding path program 10 times [2019-10-14 21:42:53,315 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:53,315 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832526485] [2019-10-14 21:42:53,316 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:53,316 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:53,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:53,593 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 2 proven. 145 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-14 21:42:53,594 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832526485] [2019-10-14 21:42:53,594 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898398110] [2019-10-14 21:42:53,594 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 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 21:42:53,653 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:53,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:53,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:42:53,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:53,761 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-10-14 21:42:53,762 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:53,762 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2019-10-14 21:42:53,762 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439864964] [2019-10-14 21:42:53,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 21:42:53,763 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:53,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 21:42:53,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:42:53,763 INFO L87 Difference]: Start difference. First operand 203 states and 280 transitions. Second operand 26 states. [2019-10-14 21:42:54,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:54,194 INFO L93 Difference]: Finished difference Result 398 states and 561 transitions. [2019-10-14 21:42:54,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 21:42:54,195 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 77 [2019-10-14 21:42:54,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:54,196 INFO L225 Difference]: With dead ends: 398 [2019-10-14 21:42:54,197 INFO L226 Difference]: Without dead ends: 222 [2019-10-14 21:42:54,198 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:42:54,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-10-14 21:42:54,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 211. [2019-10-14 21:42:54,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-10-14 21:42:54,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 290 transitions. [2019-10-14 21:42:54,211 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 290 transitions. Word has length 77 [2019-10-14 21:42:54,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:54,212 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 290 transitions. [2019-10-14 21:42:54,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 21:42:54,212 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 290 transitions. [2019-10-14 21:42:54,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-14 21:42:54,213 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:54,213 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:54,425 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:54,425 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:54,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:54,425 INFO L82 PathProgramCache]: Analyzing trace with hash -205668511, now seen corresponding path program 11 times [2019-10-14 21:42:54,425 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:54,426 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184524636] [2019-10-14 21:42:54,426 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:54,426 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:54,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:54,595 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 2 proven. 176 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-10-14 21:42:54,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184524636] [2019-10-14 21:42:54,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690013263] [2019-10-14 21:42:54,595 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 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 21:42:54,780 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-14 21:42:54,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:54,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:42:54,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-14 21:42:54,987 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:54,988 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2019-10-14 21:42:54,988 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761939004] [2019-10-14 21:42:54,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-14 21:42:54,989 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:54,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-14 21:42:54,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:42:54,989 INFO L87 Difference]: Start difference. First operand 211 states and 290 transitions. Second operand 29 states. [2019-10-14 21:42:56,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:56,903 INFO L93 Difference]: Finished difference Result 1076 states and 1558 transitions. [2019-10-14 21:42:56,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-10-14 21:42:56,905 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 82 [2019-10-14 21:42:56,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:56,911 INFO L225 Difference]: With dead ends: 1076 [2019-10-14 21:42:56,911 INFO L226 Difference]: Without dead ends: 890 [2019-10-14 21:42:56,913 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2019-10-14 21:42:56,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2019-10-14 21:42:56,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 243. [2019-10-14 21:42:56,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2019-10-14 21:42:56,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 340 transitions. [2019-10-14 21:42:56,939 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 340 transitions. Word has length 82 [2019-10-14 21:42:56,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:56,939 INFO L462 AbstractCegarLoop]: Abstraction has 243 states and 340 transitions. [2019-10-14 21:42:56,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-14 21:42:56,939 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 340 transitions. [2019-10-14 21:42:56,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-14 21:42:56,940 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:56,940 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:57,144 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:57,145 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:57,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:57,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1169742632, now seen corresponding path program 12 times [2019-10-14 21:42:57,145 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:57,146 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075352385] [2019-10-14 21:42:57,146 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:57,146 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:57,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 2 proven. 210 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-10-14 21:42:57,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075352385] [2019-10-14 21:42:57,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446737700] [2019-10-14 21:42:57,333 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 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 21:42:57,764 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 21:42:57,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:57,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:42:57,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-10-14 21:42:57,985 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:57,986 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2019-10-14 21:42:57,986 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808025929] [2019-10-14 21:42:57,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 21:42:57,986 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:57,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 21:42:57,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=774, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:42:57,987 INFO L87 Difference]: Start difference. First operand 243 states and 340 transitions. Second operand 32 states. [2019-10-14 21:43:00,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:00,633 INFO L93 Difference]: Finished difference Result 1022 states and 1491 transitions. [2019-10-14 21:43:00,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-14 21:43:00,633 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 87 [2019-10-14 21:43:00,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:00,640 INFO L225 Difference]: With dead ends: 1022 [2019-10-14 21:43:00,640 INFO L226 Difference]: Without dead ends: 884 [2019-10-14 21:43:00,646 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1037, Invalid=3933, Unknown=0, NotChecked=0, Total=4970 [2019-10-14 21:43:00,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2019-10-14 21:43:00,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 255. [2019-10-14 21:43:00,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2019-10-14 21:43:00,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 358 transitions. [2019-10-14 21:43:00,674 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 358 transitions. Word has length 87 [2019-10-14 21:43:00,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:00,674 INFO L462 AbstractCegarLoop]: Abstraction has 255 states and 358 transitions. [2019-10-14 21:43:00,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 21:43:00,674 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 358 transitions. [2019-10-14 21:43:00,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-14 21:43:00,676 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:00,676 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:00,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:00,881 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:00,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:00,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1569326755, now seen corresponding path program 13 times [2019-10-14 21:43:00,882 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:00,882 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380744069] [2019-10-14 21:43:00,882 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:00,882 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:00,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:01,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 2 proven. 247 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-10-14 21:43:01,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380744069] [2019-10-14 21:43:01,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552974220] [2019-10-14 21:43:01,173 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 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 21:43:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:01,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 21:43:01,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-10-14 21:43:01,596 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:01,596 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2019-10-14 21:43:01,596 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283509475] [2019-10-14 21:43:01,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 21:43:01,597 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:01,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 21:43:01,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:43:01,598 INFO L87 Difference]: Start difference. First operand 255 states and 358 transitions. Second operand 32 states. [2019-10-14 21:43:03,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:03,813 INFO L93 Difference]: Finished difference Result 1170 states and 1698 transitions. [2019-10-14 21:43:03,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-10-14 21:43:03,813 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 90 [2019-10-14 21:43:03,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:03,818 INFO L225 Difference]: With dead ends: 1170 [2019-10-14 21:43:03,818 INFO L226 Difference]: Without dead ends: 942 [2019-10-14 21:43:03,820 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=826, Invalid=2714, Unknown=0, NotChecked=0, Total=3540 [2019-10-14 21:43:03,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2019-10-14 21:43:03,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 269. [2019-10-14 21:43:03,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2019-10-14 21:43:03,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 378 transitions. [2019-10-14 21:43:03,847 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 378 transitions. Word has length 90 [2019-10-14 21:43:03,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:03,847 INFO L462 AbstractCegarLoop]: Abstraction has 269 states and 378 transitions. [2019-10-14 21:43:03,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 21:43:03,847 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 378 transitions. [2019-10-14 21:43:03,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-14 21:43:03,848 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:03,848 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:04,052 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:04,052 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:04,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:04,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1949496998, now seen corresponding path program 14 times [2019-10-14 21:43:04,053 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:04,053 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717602410] [2019-10-14 21:43:04,053 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:04,053 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:04,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:04,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 2 proven. 287 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-10-14 21:43:04,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717602410] [2019-10-14 21:43:04,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294114189] [2019-10-14 21:43:04,311 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 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 21:43:04,399 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:43:04,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:04,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:43:04,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2019-10-14 21:43:04,514 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:04,514 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2019-10-14 21:43:04,514 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987950865] [2019-10-14 21:43:04,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-14 21:43:04,515 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:04,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-14 21:43:04,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 21:43:04,515 INFO L87 Difference]: Start difference. First operand 269 states and 378 transitions. Second operand 33 states. [2019-10-14 21:43:05,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:05,166 INFO L93 Difference]: Finished difference Result 524 states and 751 transitions. [2019-10-14 21:43:05,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-14 21:43:05,167 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 95 [2019-10-14 21:43:05,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:05,169 INFO L225 Difference]: With dead ends: 524 [2019-10-14 21:43:05,169 INFO L226 Difference]: Without dead ends: 288 [2019-10-14 21:43:05,170 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=512, Invalid=1650, Unknown=0, NotChecked=0, Total=2162 [2019-10-14 21:43:05,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2019-10-14 21:43:05,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 277. [2019-10-14 21:43:05,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2019-10-14 21:43:05,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 388 transitions. [2019-10-14 21:43:05,188 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 388 transitions. Word has length 95 [2019-10-14 21:43:05,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:05,188 INFO L462 AbstractCegarLoop]: Abstraction has 277 states and 388 transitions. [2019-10-14 21:43:05,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-14 21:43:05,188 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 388 transitions. [2019-10-14 21:43:05,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-14 21:43:05,190 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:05,190 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:05,394 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:05,394 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:05,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:05,395 INFO L82 PathProgramCache]: Analyzing trace with hash -511480889, now seen corresponding path program 15 times [2019-10-14 21:43:05,395 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:05,395 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354851277] [2019-10-14 21:43:05,395 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:05,396 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:05,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:05,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 2 proven. 330 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2019-10-14 21:43:05,640 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354851277] [2019-10-14 21:43:05,640 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776060579] [2019-10-14 21:43:05,640 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 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 21:43:05,901 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-10-14 21:43:05,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:05,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:43:05,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2019-10-14 21:43:06,148 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:06,148 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 36 [2019-10-14 21:43:06,148 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943276649] [2019-10-14 21:43:06,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 21:43:06,149 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:06,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 21:43:06,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:43:06,149 INFO L87 Difference]: Start difference. First operand 277 states and 388 transitions. Second operand 36 states. [2019-10-14 21:43:08,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:08,769 INFO L93 Difference]: Finished difference Result 1338 states and 1944 transitions. [2019-10-14 21:43:08,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-10-14 21:43:08,770 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 100 [2019-10-14 21:43:08,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:08,775 INFO L225 Difference]: With dead ends: 1338 [2019-10-14 21:43:08,776 INFO L226 Difference]: Without dead ends: 1092 [2019-10-14 21:43:08,778 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1055, Invalid=3501, Unknown=0, NotChecked=0, Total=4556 [2019-10-14 21:43:08,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2019-10-14 21:43:08,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 297. [2019-10-14 21:43:08,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2019-10-14 21:43:08,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 418 transitions. [2019-10-14 21:43:08,808 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 418 transitions. Word has length 100 [2019-10-14 21:43:08,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:08,808 INFO L462 AbstractCegarLoop]: Abstraction has 297 states and 418 transitions. [2019-10-14 21:43:08,808 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 21:43:08,809 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 418 transitions. [2019-10-14 21:43:08,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-14 21:43:08,810 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:08,810 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:09,014 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:09,015 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:09,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:09,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1475096962, now seen corresponding path program 16 times [2019-10-14 21:43:09,015 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:09,015 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482610090] [2019-10-14 21:43:09,016 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:09,016 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:09,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:09,299 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 2 proven. 376 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2019-10-14 21:43:09,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482610090] [2019-10-14 21:43:09,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093996190] [2019-10-14 21:43:09,300 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 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 [2019-10-14 21:43:09,397 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:09,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:09,399 INFO L256 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 21:43:09,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2019-10-14 21:43:09,541 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:09,541 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2019-10-14 21:43:09,542 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742143931] [2019-10-14 21:43:09,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-14 21:43:09,542 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:09,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-14 21:43:09,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=988, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:43:09,543 INFO L87 Difference]: Start difference. First operand 297 states and 418 transitions. Second operand 37 states. [2019-10-14 21:43:10,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:10,246 INFO L93 Difference]: Finished difference Result 576 states and 827 transitions. [2019-10-14 21:43:10,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-14 21:43:10,246 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 105 [2019-10-14 21:43:10,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:10,249 INFO L225 Difference]: With dead ends: 576 [2019-10-14 21:43:10,249 INFO L226 Difference]: Without dead ends: 316 [2019-10-14 21:43:10,250 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=648, Invalid=2108, Unknown=0, NotChecked=0, Total=2756 [2019-10-14 21:43:10,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2019-10-14 21:43:10,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 305. [2019-10-14 21:43:10,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2019-10-14 21:43:10,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 428 transitions. [2019-10-14 21:43:10,274 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 428 transitions. Word has length 105 [2019-10-14 21:43:10,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:10,274 INFO L462 AbstractCegarLoop]: Abstraction has 305 states and 428 transitions. [2019-10-14 21:43:10,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-14 21:43:10,274 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 428 transitions. [2019-10-14 21:43:10,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-14 21:43:10,275 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:10,276 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:10,479 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:10,479 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:10,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:10,479 INFO L82 PathProgramCache]: Analyzing trace with hash -169008917, now seen corresponding path program 17 times [2019-10-14 21:43:10,480 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:10,480 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077915948] [2019-10-14 21:43:10,480 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:10,480 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:10,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:10,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 2 proven. 425 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2019-10-14 21:43:10,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077915948] [2019-10-14 21:43:10,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125554672] [2019-10-14 21:43:10,805 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:11,198 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-10-14 21:43:11,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:11,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:43:11,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2019-10-14 21:43:11,379 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:11,379 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 39 [2019-10-14 21:43:11,379 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451379189] [2019-10-14 21:43:11,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-14 21:43:11,380 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:11,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-14 21:43:11,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1100, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 21:43:11,381 INFO L87 Difference]: Start difference. First operand 305 states and 428 transitions. Second operand 39 states. [2019-10-14 21:43:12,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:12,126 INFO L93 Difference]: Finished difference Result 590 states and 845 transitions. [2019-10-14 21:43:12,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-14 21:43:12,126 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 110 [2019-10-14 21:43:12,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:12,128 INFO L225 Difference]: With dead ends: 590 [2019-10-14 21:43:12,128 INFO L226 Difference]: Without dead ends: 324 [2019-10-14 21:43:12,130 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=722, Invalid=2358, Unknown=0, NotChecked=0, Total=3080 [2019-10-14 21:43:12,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2019-10-14 21:43:12,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 313. [2019-10-14 21:43:12,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2019-10-14 21:43:12,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 438 transitions. [2019-10-14 21:43:12,151 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 438 transitions. Word has length 110 [2019-10-14 21:43:12,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:12,151 INFO L462 AbstractCegarLoop]: Abstraction has 313 states and 438 transitions. [2019-10-14 21:43:12,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-14 21:43:12,151 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 438 transitions. [2019-10-14 21:43:12,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-14 21:43:12,152 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:12,153 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:12,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:12,359 INFO L410 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:12,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:12,359 INFO L82 PathProgramCache]: Analyzing trace with hash 710540382, now seen corresponding path program 18 times [2019-10-14 21:43:12,359 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:12,360 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403008766] [2019-10-14 21:43:12,360 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:12,360 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:12,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:12,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 2 proven. 477 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2019-10-14 21:43:12,757 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403008766] [2019-10-14 21:43:12,757 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120919509] [2019-10-14 21:43:12,757 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:14,067 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-14 21:43:14,068 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:14,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 21:43:14,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2019-10-14 21:43:14,843 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:14,844 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 44 [2019-10-14 21:43:14,844 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922081405] [2019-10-14 21:43:14,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-14 21:43:14,845 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:14,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-14 21:43:14,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1464, Unknown=0, NotChecked=0, Total=1892 [2019-10-14 21:43:14,847 INFO L87 Difference]: Start difference. First operand 313 states and 438 transitions. Second operand 44 states.