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-crafted/zero_sum_const2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:42:39,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:42:39,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:42:39,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:42:39,412 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:42:39,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:42:39,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:42:39,416 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:42:39,418 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:42:39,419 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:42:39,420 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:42:39,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:42:39,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:42:39,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:42:39,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:42:39,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:42:39,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:42:39,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:42:39,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:42:39,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:42:39,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:42:39,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:42:39,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:42:39,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:42:39,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 17:42:39,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 17:42:39,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 17:42:39,439 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 17:42:39,439 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 17:42:39,440 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 17:42:39,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:42:39,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:42:39,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:42:39,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:42:39,444 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:42:39,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:42:39,445 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:42:39,445 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:42:39,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:42:39,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:42:39,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:42:39,447 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 [2019-10-13 17:42:39,464 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:42:39,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:42:39,465 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:42:39,465 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:42:39,466 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:42:39,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:42:39,467 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:42:39,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:42:39,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:42:39,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:42:39,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:42:39,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:42:39,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:42:39,470 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:42:39,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:42:39,470 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:42:39,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:42:39,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:42:39,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:42:39,471 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:42:39,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:42:39,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:42:39,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:42:39,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:42:39,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:42:39,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:42:39,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:42:39,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:42:39,473 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:42:39,743 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:42:39,759 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:42:39,763 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:42:39,764 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:42:39,765 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:42:39,766 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const2.c [2019-10-13 17:42:39,846 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c4aea510/c6ff025b276440558a5c461380681deb/FLAGa1b6090f5 [2019-10-13 17:42:40,363 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:42:40,366 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const2.c [2019-10-13 17:42:40,373 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c4aea510/c6ff025b276440558a5c461380681deb/FLAGa1b6090f5 [2019-10-13 17:42:40,769 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c4aea510/c6ff025b276440558a5c461380681deb [2019-10-13 17:42:40,780 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:42:40,782 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:42:40,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:42:40,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:42:40,786 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:42:40,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:42:40" (1/1) ... [2019-10-13 17:42:40,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aa87bfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:40, skipping insertion in model container [2019-10-13 17:42:40,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:42:40" (1/1) ... [2019-10-13 17:42:40,798 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:42:40,819 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:42:41,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:42:41,044 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:42:41,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:42:41,080 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:42:41,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:41 WrapperNode [2019-10-13 17:42:41,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:42:41,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:42:41,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:42:41,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:42:41,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:41" (1/1) ... [2019-10-13 17:42:41,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:41" (1/1) ... [2019-10-13 17:42:41,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:41" (1/1) ... [2019-10-13 17:42:41,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:41" (1/1) ... [2019-10-13 17:42:41,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:41" (1/1) ... [2019-10-13 17:42:41,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:41" (1/1) ... [2019-10-13 17:42:41,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:41" (1/1) ... [2019-10-13 17:42:41,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:42:41,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:42:41,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:42:41,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:42:41,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:41" (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 [2019-10-13 17:42:41,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:42:41,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:42:41,261 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:42:41,261 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:42:41,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:42:41,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 17:42:41,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:42:41,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-13 17:42:41,262 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 17:42:41,262 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:42:41,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 17:42:41,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:42:41,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:42:41,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:42:41,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:42:41,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:42:41,598 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:42:41,598 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-13 17:42:41,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:42:41 BoogieIcfgContainer [2019-10-13 17:42:41,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:42:41,600 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:42:41,600 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:42:41,603 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:42:41,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:42:40" (1/3) ... [2019-10-13 17:42:41,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@593552b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:42:41, skipping insertion in model container [2019-10-13 17:42:41,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:41" (2/3) ... [2019-10-13 17:42:41,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@593552b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:42:41, skipping insertion in model container [2019-10-13 17:42:41,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:42:41" (3/3) ... [2019-10-13 17:42:41,606 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const2.c [2019-10-13 17:42:41,616 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:42:41,623 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:42:41,634 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:42:41,656 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:42:41,656 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:42:41,656 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:42:41,656 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:42:41,656 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:42:41,656 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:42:41,657 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:42:41,657 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:42:41,670 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-10-13 17:42:41,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:42:41,676 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:41,677 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] [2019-10-13 17:42:41,678 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:41,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:41,682 INFO L82 PathProgramCache]: Analyzing trace with hash -720839896, now seen corresponding path program 1 times [2019-10-13 17:42:41,690 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:41,690 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185486185] [2019-10-13 17:42:41,691 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:41,691 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:41,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:41,870 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185486185] [2019-10-13 17:42:41,871 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:41,871 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:42:41,872 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198846931] [2019-10-13 17:42:41,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:42:41,878 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:41,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:42:41,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:42:41,895 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2019-10-13 17:42:42,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:42,009 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2019-10-13 17:42:42,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:42:42,011 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-10-13 17:42:42,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:42,020 INFO L225 Difference]: With dead ends: 57 [2019-10-13 17:42:42,021 INFO L226 Difference]: Without dead ends: 26 [2019-10-13 17:42:42,024 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 [2019-10-13 17:42:42,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-13 17:42:42,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-13 17:42:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-13 17:42:42,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-13 17:42:42,067 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2019-10-13 17:42:42,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:42,068 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-13 17:42:42,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:42:42,068 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-13 17:42:42,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:42:42,070 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:42,070 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] [2019-10-13 17:42:42,070 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:42,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:42,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1191176598, now seen corresponding path program 1 times [2019-10-13 17:42:42,072 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:42,072 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28596429] [2019-10-13 17:42:42,072 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:42,072 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:42,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:42,248 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28596429] [2019-10-13 17:42:42,249 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:42,249 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 17:42:42,249 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490969492] [2019-10-13 17:42:42,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:42:42,252 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:42,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:42:42,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:42:42,253 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 6 states. [2019-10-13 17:42:42,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:42,428 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2019-10-13 17:42:42,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:42:42,429 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-10-13 17:42:42,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:42,430 INFO L225 Difference]: With dead ends: 38 [2019-10-13 17:42:42,430 INFO L226 Difference]: Without dead ends: 33 [2019-10-13 17:42:42,431 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:42:42,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-13 17:42:42,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-13 17:42:42,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-13 17:42:42,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2019-10-13 17:42:42,440 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 20 [2019-10-13 17:42:42,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:42,440 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2019-10-13 17:42:42,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:42:42,441 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2019-10-13 17:42:42,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 17:42:42,442 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:42,442 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, 1, 1] [2019-10-13 17:42:42,442 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:42,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:42,443 INFO L82 PathProgramCache]: Analyzing trace with hash -988852588, now seen corresponding path program 1 times [2019-10-13 17:42:42,443 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:42,443 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252825298] [2019-10-13 17:42:42,443 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:42,444 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:42,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:42,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:42:42,547 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252825298] [2019-10-13 17:42:42,548 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:42,548 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:42:42,548 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459514069] [2019-10-13 17:42:42,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:42:42,549 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:42,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:42:42,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:42:42,550 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 4 states. [2019-10-13 17:42:42,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:42,671 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2019-10-13 17:42:42,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:42:42,671 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-10-13 17:42:42,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:42,673 INFO L225 Difference]: With dead ends: 59 [2019-10-13 17:42:42,673 INFO L226 Difference]: Without dead ends: 35 [2019-10-13 17:42:42,674 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 [2019-10-13 17:42:42,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-13 17:42:42,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-13 17:42:42,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-13 17:42:42,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2019-10-13 17:42:42,682 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 22 [2019-10-13 17:42:42,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:42,682 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2019-10-13 17:42:42,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:42:42,683 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2019-10-13 17:42:42,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 17:42:42,684 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:42,684 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, 1, 1, 1, 1] [2019-10-13 17:42:42,685 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:42,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:42,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1991586542, now seen corresponding path program 1 times [2019-10-13 17:42:42,685 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:42,686 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697015786] [2019-10-13 17:42:42,686 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:42,686 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:42,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:42,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:42:42,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697015786] [2019-10-13 17:42:42,789 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:42,790 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 17:42:42,790 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155709200] [2019-10-13 17:42:42,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:42:42,791 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:42,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:42:42,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:42:42,791 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 5 states. [2019-10-13 17:42:42,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:42,935 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-10-13 17:42:42,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:42:42,935 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-10-13 17:42:42,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:42,936 INFO L225 Difference]: With dead ends: 55 [2019-10-13 17:42:42,937 INFO L226 Difference]: Without dead ends: 36 [2019-10-13 17:42:42,937 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:42:42,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-13 17:42:42,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2019-10-13 17:42:42,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-13 17:42:42,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-10-13 17:42:42,944 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2019-10-13 17:42:42,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:42,945 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-10-13 17:42:42,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:42:42,945 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-10-13 17:42:42,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 17:42:42,946 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:42,946 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:42,947 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:42,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:42,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1169709580, now seen corresponding path program 1 times [2019-10-13 17:42:42,947 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:42,948 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528779173] [2019-10-13 17:42:42,948 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:42,948 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:42,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 17:42:43,059 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528779173] [2019-10-13 17:42:43,059 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205254392] [2019-10-13 17:42:43,059 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 [2019-10-13 17:42:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:43,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:42:43,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 17:42:43,189 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:43,190 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-13 17:42:43,190 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48255972] [2019-10-13 17:42:43,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:42:43,191 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:43,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:42:43,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:42:43,191 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2019-10-13 17:42:43,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:43,318 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2019-10-13 17:42:43,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:42:43,318 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2019-10-13 17:42:43,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:43,319 INFO L225 Difference]: With dead ends: 55 [2019-10-13 17:42:43,319 INFO L226 Difference]: Without dead ends: 34 [2019-10-13 17:42:43,320 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:42:43,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-13 17:42:43,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-10-13 17:42:43,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-13 17:42:43,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-13 17:42:43,327 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 30 [2019-10-13 17:42:43,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:43,327 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-13 17:42:43,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:42:43,327 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-13 17:42:43,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 17:42:43,328 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:43,329 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:43,532 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:43,533 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:43,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:43,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1195670154, now seen corresponding path program 2 times [2019-10-13 17:42:43,533 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:43,534 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726716285] [2019-10-13 17:42:43,534 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:43,534 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:43,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 17:42:43,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726716285] [2019-10-13 17:42:43,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780318684] [2019-10-13 17:42:43,672 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 [2019-10-13 17:42:43,732 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:42:43,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:42:43,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:42:43,736 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 17:42:43,770 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:43,770 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-10-13 17:42:43,770 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452498590] [2019-10-13 17:42:43,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:42:43,771 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:43,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:42:43,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:42:43,772 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 8 states. [2019-10-13 17:42:43,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:43,939 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2019-10-13 17:42:43,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:42:43,940 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2019-10-13 17:42:43,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:43,941 INFO L225 Difference]: With dead ends: 63 [2019-10-13 17:42:43,941 INFO L226 Difference]: Without dead ends: 46 [2019-10-13 17:42:43,942 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:42:43,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-13 17:42:43,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2019-10-13 17:42:43,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-13 17:42:43,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-10-13 17:42:43,949 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2019-10-13 17:42:43,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:43,950 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-10-13 17:42:43,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:42:43,950 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-10-13 17:42:43,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-13 17:42:43,951 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:43,951 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:44,155 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:44,156 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:44,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:44,157 INFO L82 PathProgramCache]: Analyzing trace with hash -187044094, now seen corresponding path program 3 times [2019-10-13 17:42:44,157 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:44,158 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726587527] [2019-10-13 17:42:44,158 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:44,159 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:44,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:44,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:45,249 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:45,249 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726587527] [2019-10-13 17:42:45,250 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525022873] [2019-10-13 17:42:45,250 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 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 [2019-10-13 17:42:45,311 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:42:45,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:42:45,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 54 conjunts are in the unsatisfiable core [2019-10-13 17:42:45,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:45,420 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-10-13 17:42:45,420 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:42:45,430 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:42:45,430 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:42:45,431 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2019-10-13 17:42:46,604 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:42:46,615 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:42:46,616 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 36 [2019-10-13 17:42:46,618 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:42:46,655 INFO L567 ElimStorePlain]: treesize reduction 15, result has 71.7 percent of original size [2019-10-13 17:42:46,657 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:42:46,661 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:42:46,661 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:35 [2019-10-13 17:42:46,734 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:42:46,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:42:46,837 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:42:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:46,929 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:46,929 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 40 [2019-10-13 17:42:46,929 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987403836] [2019-10-13 17:42:46,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-13 17:42:46,930 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:46,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-13 17:42:46,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1422, Unknown=0, NotChecked=0, Total=1560 [2019-10-13 17:42:46,932 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 40 states. [2019-10-13 17:42:48,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:48,962 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2019-10-13 17:42:48,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-13 17:42:48,962 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2019-10-13 17:42:48,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:48,965 INFO L225 Difference]: With dead ends: 98 [2019-10-13 17:42:48,965 INFO L226 Difference]: Without dead ends: 92 [2019-10-13 17:42:48,967 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 12 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=251, Invalid=2611, Unknown=0, NotChecked=0, Total=2862 [2019-10-13 17:42:48,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-13 17:42:48,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 58. [2019-10-13 17:42:48,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-13 17:42:48,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2019-10-13 17:42:48,978 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 40 [2019-10-13 17:42:48,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:48,978 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2019-10-13 17:42:48,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-13 17:42:48,978 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2019-10-13 17:42:48,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 17:42:48,980 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:48,980 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:49,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:49,185 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:49,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:49,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1685956864, now seen corresponding path program 4 times [2019-10-13 17:42:49,186 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:49,187 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914312097] [2019-10-13 17:42:49,187 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:49,187 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:49,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:42:49,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914312097] [2019-10-13 17:42:49,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925259074] [2019-10-13 17:42:49,308 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 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 [2019-10-13 17:42:49,372 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:42:49,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:42:49,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:42:49,379 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:42:49,434 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:49,434 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-13 17:42:49,435 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253306972] [2019-10-13 17:42:49,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:42:49,435 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:49,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:42:49,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:42:49,436 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 14 states. [2019-10-13 17:42:49,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:49,756 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2019-10-13 17:42:49,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:42:49,756 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2019-10-13 17:42:49,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:49,760 INFO L225 Difference]: With dead ends: 125 [2019-10-13 17:42:49,760 INFO L226 Difference]: Without dead ends: 75 [2019-10-13 17:42:49,761 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:42:49,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-13 17:42:49,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2019-10-13 17:42:49,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-13 17:42:49,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2019-10-13 17:42:49,772 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 42 [2019-10-13 17:42:49,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:49,772 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2019-10-13 17:42:49,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:42:49,773 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2019-10-13 17:42:49,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-13 17:42:49,774 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:49,774 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:49,977 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:49,978 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:49,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:49,979 INFO L82 PathProgramCache]: Analyzing trace with hash 19991870, now seen corresponding path program 5 times [2019-10-13 17:42:49,979 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:49,979 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128536936] [2019-10-13 17:42:49,980 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:49,980 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:49,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 17:42:50,074 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128536936] [2019-10-13 17:42:50,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887154144] [2019-10-13 17:42:50,078 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 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 [2019-10-13 17:42:50,153 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-13 17:42:50,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:42:50,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:42:50,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 17:42:50,231 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:50,231 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-13 17:42:50,231 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482342013] [2019-10-13 17:42:50,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:42:50,232 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:50,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:42:50,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:42:50,236 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 14 states. [2019-10-13 17:42:50,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:50,557 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2019-10-13 17:42:50,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:42:50,558 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2019-10-13 17:42:50,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:50,559 INFO L225 Difference]: With dead ends: 72 [2019-10-13 17:42:50,559 INFO L226 Difference]: Without dead ends: 55 [2019-10-13 17:42:50,559 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:42:50,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-13 17:42:50,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2019-10-13 17:42:50,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-13 17:42:50,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-10-13 17:42:50,567 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 44 [2019-10-13 17:42:50,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:50,568 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-10-13 17:42:50,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:42:50,568 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-10-13 17:42:50,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-13 17:42:50,569 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:50,569 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:50,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:50,773 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:50,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:50,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1936263288, now seen corresponding path program 6 times [2019-10-13 17:42:50,774 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:50,775 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726728965] [2019-10-13 17:42:50,775 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:50,775 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:50,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:51,906 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2019-10-13 17:42:52,067 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2019-10-13 17:42:53,016 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2019-10-13 17:42:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:55,151 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:55,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726728965] [2019-10-13 17:42:55,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550931199] [2019-10-13 17:42:55,152 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 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 [2019-10-13 17:42:55,204 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-13 17:42:55,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:42:55,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 68 conjunts are in the unsatisfiable core [2019-10-13 17:42:55,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:55,320 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-10-13 17:42:55,321 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:42:55,329 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:42:55,329 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:42:55,330 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-10-13 17:42:56,771 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:42:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:56,888 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:56,888 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 28] total 68 [2019-10-13 17:42:56,888 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190172096] [2019-10-13 17:42:56,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-10-13 17:42:56,889 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:56,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-10-13 17:42:56,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=4167, Unknown=0, NotChecked=0, Total=4556 [2019-10-13 17:42:56,892 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 68 states. [2019-10-13 17:42:58,513 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 48 [2019-10-13 17:42:59,394 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2019-10-13 17:43:00,128 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 35 [2019-10-13 17:43:00,586 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 38 [2019-10-13 17:43:00,969 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2019-10-13 17:43:04,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:04,522 INFO L93 Difference]: Finished difference Result 129 states and 143 transitions. [2019-10-13 17:43:04,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-13 17:43:04,522 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 50 [2019-10-13 17:43:04,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:04,524 INFO L225 Difference]: With dead ends: 129 [2019-10-13 17:43:04,524 INFO L226 Difference]: Without dead ends: 97 [2019-10-13 17:43:04,528 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3464 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1117, Invalid=10013, Unknown=0, NotChecked=0, Total=11130 [2019-10-13 17:43:04,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-10-13 17:43:04,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 84. [2019-10-13 17:43:04,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-10-13 17:43:04,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2019-10-13 17:43:04,540 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 50 [2019-10-13 17:43:04,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:04,541 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2019-10-13 17:43:04,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-10-13 17:43:04,541 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2019-10-13 17:43:04,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 17:43:04,542 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:04,542 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:04,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:04,745 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:04,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:04,746 INFO L82 PathProgramCache]: Analyzing trace with hash 2074885366, now seen corresponding path program 7 times [2019-10-13 17:43:04,746 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:04,746 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592533111] [2019-10-13 17:43:04,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:04,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:04,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:04,855 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-13 17:43:04,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592533111] [2019-10-13 17:43:04,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222647994] [2019-10-13 17:43:04,855 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 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 [2019-10-13 17:43:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:04,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:43:04,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-13 17:43:04,984 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:04,984 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2019-10-13 17:43:04,985 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573087917] [2019-10-13 17:43:04,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 17:43:04,985 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:04,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 17:43:04,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:43:04,986 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand 17 states. [2019-10-13 17:43:05,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:05,347 INFO L93 Difference]: Finished difference Result 155 states and 171 transitions. [2019-10-13 17:43:05,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:43:05,348 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2019-10-13 17:43:05,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:05,350 INFO L225 Difference]: With dead ends: 155 [2019-10-13 17:43:05,350 INFO L226 Difference]: Without dead ends: 89 [2019-10-13 17:43:05,352 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:43:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-13 17:43:05,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2019-10-13 17:43:05,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-13 17:43:05,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2019-10-13 17:43:05,362 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 52 [2019-10-13 17:43:05,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:05,363 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2019-10-13 17:43:05,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 17:43:05,363 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2019-10-13 17:43:05,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-13 17:43:05,364 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:05,364 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:05,567 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:05,568 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:05,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:05,568 INFO L82 PathProgramCache]: Analyzing trace with hash 155810740, now seen corresponding path program 8 times [2019-10-13 17:43:05,569 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:05,569 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137348056] [2019-10-13 17:43:05,569 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:05,569 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:05,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:05,677 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 17:43:05,679 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137348056] [2019-10-13 17:43:05,680 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344099425] [2019-10-13 17:43:05,680 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 [2019-10-13 17:43:05,760 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:05,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:05,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:43:05,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 17:43:05,877 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:05,878 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2019-10-13 17:43:05,878 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332816567] [2019-10-13 17:43:05,878 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 17:43:05,879 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:05,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 17:43:05,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:43:05,879 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand 17 states. [2019-10-13 17:43:06,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:06,293 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2019-10-13 17:43:06,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:43:06,294 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 54 [2019-10-13 17:43:06,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:06,295 INFO L225 Difference]: With dead ends: 86 [2019-10-13 17:43:06,295 INFO L226 Difference]: Without dead ends: 65 [2019-10-13 17:43:06,296 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2019-10-13 17:43:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-13 17:43:06,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2019-10-13 17:43:06,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-13 17:43:06,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-10-13 17:43:06,304 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 54 [2019-10-13 17:43:06,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:06,304 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-10-13 17:43:06,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 17:43:06,304 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-10-13 17:43:06,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-13 17:43:06,305 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:06,305 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:06,512 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:06,513 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:06,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:06,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1133377938, now seen corresponding path program 9 times [2019-10-13 17:43:06,513 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:06,513 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761852500] [2019-10-13 17:43:06,514 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:06,514 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:06,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:07,420 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2019-10-13 17:43:07,727 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2019-10-13 17:43:07,923 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2019-10-13 17:43:08,126 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2019-10-13 17:43:08,362 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2019-10-13 17:43:08,567 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2019-10-13 17:43:09,114 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2019-10-13 17:43:09,270 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2019-10-13 17:43:09,437 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2019-10-13 17:43:09,625 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 43 [2019-10-13 17:43:09,794 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2019-10-13 17:43:10,007 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2019-10-13 17:43:10,197 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2019-10-13 17:43:10,390 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2019-10-13 17:43:10,549 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2019-10-13 17:43:10,717 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2019-10-13 17:43:10,898 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2019-10-13 17:43:11,078 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2019-10-13 17:43:11,320 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2019-10-13 17:43:11,510 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2019-10-13 17:43:11,683 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2019-10-13 17:43:11,868 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2019-10-13 17:43:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:43:13,479 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761852500] [2019-10-13 17:43:13,479 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180847161] [2019-10-13 17:43:13,480 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 [2019-10-13 17:43:13,589 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-13 17:43:13,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:13,593 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 88 conjunts are in the unsatisfiable core [2019-10-13 17:43:13,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:13,646 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-10-13 17:43:13,647 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:43:13,653 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:43:13,654 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:43:13,654 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-10-13 17:43:16,206 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:43:16,209 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:43:16,210 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:43:16,214 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:43:16,216 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:43:16,216 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:43:16,236 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:43:16,237 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 65 [2019-10-13 17:43:16,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:16,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:16,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:16,239 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:16,240 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:16,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:16,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:16,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:16,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:16,244 INFO L496 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2019-10-13 17:43:16,291 INFO L567 ElimStorePlain]: treesize reduction 67, result has 35.6 percent of original size [2019-10-13 17:43:16,292 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:16,293 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 17:43:16,294 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:21 [2019-10-13 17:43:16,448 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:16,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:43:16,620 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:16,620 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 32] total 82 [2019-10-13 17:43:16,620 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896588113] [2019-10-13 17:43:16,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-10-13 17:43:16,621 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:16,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-10-13 17:43:16,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=6056, Unknown=0, NotChecked=0, Total=6642 [2019-10-13 17:43:16,623 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 82 states. [2019-10-13 17:43:20,229 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2019-10-13 17:43:20,851 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2019-10-13 17:43:22,512 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 60 [2019-10-13 17:43:22,972 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 75 [2019-10-13 17:43:23,486 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62