/usr/bin/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 --traceabstraction.trace.refinement.strategy CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:44:26,307 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:44:26,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:44:26,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:44:26,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:44:26,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:44:26,325 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:44:26,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:44:26,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:44:26,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:44:26,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:44:26,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:44:26,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:44:26,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:44:26,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:44:26,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:44:26,337 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:44:26,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:44:26,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:44:26,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:44:26,344 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:44:26,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:44:26,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:44:26,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:44:26,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-19 21:44:26,350 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-19 21:44:26,350 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-19 21:44:26,351 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-19 21:44:26,352 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-19 21:44:26,353 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-19 21:44:26,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-19 21:44:26,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-19 21:44:26,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-19 21:44:26,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-19 21:44:26,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-19 21:44:26,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-19 21:44:26,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-19 21:44:26,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-19 21:44:26,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:44:26,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:44:26,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:44:26,360 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 [2020-07-19 21:44:26,375 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:44:26,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:44:26,377 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:44:26,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:44:26,377 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:44:26,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:44:26,378 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:44:26,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:44:26,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:44:26,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:44:26,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:44:26,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:44:26,379 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:44:26,379 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:44:26,379 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:44:26,380 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:44:26,380 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:44:26,380 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:44:26,380 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:44:26,380 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:44:26,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:44:26,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:44:26,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:44:26,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:44:26,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:44:26,382 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:44:26,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:44:26,382 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:44:26,382 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:44:26,382 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:44:26,699 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:44:26,719 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:44:26,723 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:44:26,725 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:44:26,727 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:44:26,728 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-07-19 21:44:26,792 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a66deae4f/c59c962373d447e6a0afb1fbc597425a/FLAGd4eda2b6b [2020-07-19 21:44:27,278 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:44:27,279 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-07-19 21:44:27,285 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a66deae4f/c59c962373d447e6a0afb1fbc597425a/FLAGd4eda2b6b [2020-07-19 21:44:27,644 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a66deae4f/c59c962373d447e6a0afb1fbc597425a [2020-07-19 21:44:27,654 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:44:27,657 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:44:27,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:44:27,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:44:27,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:44:27,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:44:27" (1/1) ... [2020-07-19 21:44:27,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b3607cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:27, skipping insertion in model container [2020-07-19 21:44:27,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:44:27" (1/1) ... [2020-07-19 21:44:27,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:44:27,697 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:44:28,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:44:28,029 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:44:28,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:44:28,196 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:44:28,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:28 WrapperNode [2020-07-19 21:44:28,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:44:28,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:44:28,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:44:28,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:44:28,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:28" (1/1) ... [2020-07-19 21:44:28,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:28" (1/1) ... [2020-07-19 21:44:28,236 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:28" (1/1) ... [2020-07-19 21:44:28,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:28" (1/1) ... [2020-07-19 21:44:28,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:28" (1/1) ... [2020-07-19 21:44:28,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:28" (1/1) ... [2020-07-19 21:44:28,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:28" (1/1) ... [2020-07-19 21:44:28,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:44:28,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:44:28,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:44:28,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:44:28,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:28" (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 [2020-07-19 21:44:28,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:44:28,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:44:28,372 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 21:44:28,372 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-07-19 21:44:28,372 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-07-19 21:44:28,372 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:44:28,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:44:28,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 21:44:28,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 21:44:28,373 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-07-19 21:44:28,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-19 21:44:28,373 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-07-19 21:44:28,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-19 21:44:28,373 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:44:28,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-19 21:44:28,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 21:44:28,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:44:28,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:44:28,782 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:44:28,782 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-07-19 21:44:28,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:44:28 BoogieIcfgContainer [2020-07-19 21:44:28,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:44:28,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:44:28,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:44:28,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:44:28,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:44:27" (1/3) ... [2020-07-19 21:44:28,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a765db4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:44:28, skipping insertion in model container [2020-07-19 21:44:28,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:28" (2/3) ... [2020-07-19 21:44:28,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a765db4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:44:28, skipping insertion in model container [2020-07-19 21:44:28,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:44:28" (3/3) ... [2020-07-19 21:44:28,795 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-07-19 21:44:28,806 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:44:28,813 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:44:28,826 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:44:28,850 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:44:28,851 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:44:28,851 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:44:28,851 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:44:28,855 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:44:28,856 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:44:28,856 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:44:28,856 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:44:28,877 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-07-19 21:44:28,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-19 21:44:28,883 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:28,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:28,884 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:28,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:28,891 INFO L82 PathProgramCache]: Analyzing trace with hash 528217166, now seen corresponding path program 1 times [2020-07-19 21:44:28,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:28,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358865709] [2020-07-19 21:44:28,899 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:44:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:44:29,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358865709] [2020-07-19 21:44:29,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:44:29,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 21:44:29,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911456555] [2020-07-19 21:44:29,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 21:44:29,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:29,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 21:44:29,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 21:44:29,139 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-07-19 21:44:29,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:29,446 INFO L93 Difference]: Finished difference Result 150 states and 228 transitions. [2020-07-19 21:44:29,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 21:44:29,449 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-19 21:44:29,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:29,460 INFO L225 Difference]: With dead ends: 150 [2020-07-19 21:44:29,460 INFO L226 Difference]: Without dead ends: 89 [2020-07-19 21:44:29,465 INFO L675 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 [2020-07-19 21:44:29,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-19 21:44:29,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-07-19 21:44:29,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-19 21:44:29,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-07-19 21:44:29,522 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 14 [2020-07-19 21:44:29,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:29,522 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-07-19 21:44:29,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 21:44:29,523 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-07-19 21:44:29,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-19 21:44:29,524 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:29,524 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:29,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:44:29,525 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:29,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:29,526 INFO L82 PathProgramCache]: Analyzing trace with hash 396779504, now seen corresponding path program 1 times [2020-07-19 21:44:29,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:29,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516150667] [2020-07-19 21:44:29,527 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:44:29,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:29,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:44:29,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516150667] [2020-07-19 21:44:29,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401771911] [2020-07-19 21:44:29,598 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 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 [2020-07-19 21:44:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:29,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-19 21:44:29,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:44:29,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:29,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-07-19 21:44:29,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401080255] [2020-07-19 21:44:29,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 21:44:29,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:29,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 21:44:29,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:44:29,694 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 6 states. [2020-07-19 21:44:30,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:30,019 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-07-19 21:44:30,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:44:30,020 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-19 21:44:30,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:30,022 INFO L225 Difference]: With dead ends: 170 [2020-07-19 21:44:30,024 INFO L226 Difference]: Without dead ends: 122 [2020-07-19 21:44:30,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:44:30,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-19 21:44:30,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 59. [2020-07-19 21:44:30,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-19 21:44:30,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-07-19 21:44:30,051 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 16 [2020-07-19 21:44:30,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:30,052 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-07-19 21:44:30,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 21:44:30,052 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-07-19 21:44:30,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-19 21:44:30,053 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:30,054 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:30,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-19 21:44:30,255 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:30,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:30,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1360762094, now seen corresponding path program 2 times [2020-07-19 21:44:30,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:30,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159953230] [2020-07-19 21:44:30,258 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:44:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:44:30,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159953230] [2020-07-19 21:44:30,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811800987] [2020-07-19 21:44:30,327 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 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 [2020-07-19 21:44:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:30,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-19 21:44:30,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:44:30,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:30,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-07-19 21:44:30,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329111207] [2020-07-19 21:44:30,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 21:44:30,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:30,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 21:44:30,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:44:30,393 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 7 states. [2020-07-19 21:44:30,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:30,711 INFO L93 Difference]: Finished difference Result 203 states and 268 transitions. [2020-07-19 21:44:30,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 21:44:30,712 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-07-19 21:44:30,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:30,716 INFO L225 Difference]: With dead ends: 203 [2020-07-19 21:44:30,716 INFO L226 Difference]: Without dead ends: 155 [2020-07-19 21:44:30,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:44:30,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-19 21:44:30,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 61. [2020-07-19 21:44:30,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-19 21:44:30,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-07-19 21:44:30,731 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 18 [2020-07-19 21:44:30,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:30,731 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-07-19 21:44:30,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 21:44:30,732 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-07-19 21:44:30,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-19 21:44:30,733 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:30,733 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:30,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:30,948 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:30,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:30,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1858876852, now seen corresponding path program 3 times [2020-07-19 21:44:30,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:30,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075486316] [2020-07-19 21:44:30,951 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:44:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:44:31,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075486316] [2020-07-19 21:44:31,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008600388] [2020-07-19 21:44:31,027 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 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 [2020-07-19 21:44:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:31,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-19 21:44:31,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:44:31,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:31,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-07-19 21:44:31,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245297476] [2020-07-19 21:44:31,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 21:44:31,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:31,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 21:44:31,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:44:31,111 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 8 states. [2020-07-19 21:44:31,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:31,517 INFO L93 Difference]: Finished difference Result 236 states and 314 transitions. [2020-07-19 21:44:31,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:44:31,518 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-07-19 21:44:31,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:31,521 INFO L225 Difference]: With dead ends: 236 [2020-07-19 21:44:31,521 INFO L226 Difference]: Without dead ends: 188 [2020-07-19 21:44:31,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:44:31,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-07-19 21:44:31,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 63. [2020-07-19 21:44:31,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-19 21:44:31,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-07-19 21:44:31,544 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 20 [2020-07-19 21:44:31,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:31,544 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-07-19 21:44:31,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 21:44:31,545 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-07-19 21:44:31,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-19 21:44:31,545 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:31,546 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:31,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:31,759 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:31,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:31,759 INFO L82 PathProgramCache]: Analyzing trace with hash -739516458, now seen corresponding path program 4 times [2020-07-19 21:44:31,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:31,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179245217] [2020-07-19 21:44:31,760 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:44:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:31,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-19 21:44:31,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179245217] [2020-07-19 21:44:31,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:44:31,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 21:44:31,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279123334] [2020-07-19 21:44:31,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:44:31,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:31,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:44:31,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:44:31,821 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 5 states. [2020-07-19 21:44:31,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:31,935 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-07-19 21:44:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:44:31,936 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-07-19 21:44:31,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:31,937 INFO L225 Difference]: With dead ends: 116 [2020-07-19 21:44:31,937 INFO L226 Difference]: Without dead ends: 67 [2020-07-19 21:44:31,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:44:31,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-19 21:44:31,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-07-19 21:44:31,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-19 21:44:31,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-07-19 21:44:31,946 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 22 [2020-07-19 21:44:31,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:31,946 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-07-19 21:44:31,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:44:31,947 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-07-19 21:44:31,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-19 21:44:31,948 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:31,948 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:31,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-19 21:44:31,949 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:31,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:31,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1301458888, now seen corresponding path program 1 times [2020-07-19 21:44:31,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:31,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765657760] [2020-07-19 21:44:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:44:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:44:32,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765657760] [2020-07-19 21:44:32,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871996951] [2020-07-19 21:44:32,049 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 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 [2020-07-19 21:44:32,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:32,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-19 21:44:32,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:32,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-19 21:44:32,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:44:32,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2020-07-19 21:44:32,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475496021] [2020-07-19 21:44:32,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:44:32,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:32,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:44:32,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:44:32,124 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 3 states. [2020-07-19 21:44:32,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:32,146 INFO L93 Difference]: Finished difference Result 129 states and 158 transitions. [2020-07-19 21:44:32,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:44:32,147 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-07-19 21:44:32,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:32,148 INFO L225 Difference]: With dead ends: 129 [2020-07-19 21:44:32,148 INFO L226 Difference]: Without dead ends: 84 [2020-07-19 21:44:32,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:44:32,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-19 21:44:32,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-07-19 21:44:32,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-19 21:44:32,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2020-07-19 21:44:32,156 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 41 [2020-07-19 21:44:32,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:32,157 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2020-07-19 21:44:32,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:44:32,157 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2020-07-19 21:44:32,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-19 21:44:32,159 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:32,159 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:32,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:32,374 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:32,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:32,375 INFO L82 PathProgramCache]: Analyzing trace with hash -823156586, now seen corresponding path program 1 times [2020-07-19 21:44:32,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:32,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410857816] [2020-07-19 21:44:32,376 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:44:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-19 21:44:32,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410857816] [2020-07-19 21:44:32,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009008918] [2020-07-19 21:44:32,446 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 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 [2020-07-19 21:44:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:32,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 21:44:32,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:32,572 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 21:44:32,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:32,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2020-07-19 21:44:32,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499227224] [2020-07-19 21:44:32,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 21:44:32,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:32,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 21:44:32,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:44:32,577 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 11 states. [2020-07-19 21:44:33,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:33,393 INFO L93 Difference]: Finished difference Result 371 states and 506 transitions. [2020-07-19 21:44:33,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-19 21:44:33,393 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-07-19 21:44:33,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:33,395 INFO L225 Difference]: With dead ends: 371 [2020-07-19 21:44:33,396 INFO L226 Difference]: Without dead ends: 320 [2020-07-19 21:44:33,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2020-07-19 21:44:33,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-07-19 21:44:33,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 85. [2020-07-19 21:44:33,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-19 21:44:33,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2020-07-19 21:44:33,415 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 43 [2020-07-19 21:44:33,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:33,416 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2020-07-19 21:44:33,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 21:44:33,416 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2020-07-19 21:44:33,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-19 21:44:33,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:33,418 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:33,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-19 21:44:33,632 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:33,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:33,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1343229550, now seen corresponding path program 2 times [2020-07-19 21:44:33,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:33,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640758655] [2020-07-19 21:44:33,634 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:44:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:33,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640758655] [2020-07-19 21:44:33,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881956958] [2020-07-19 21:44:33,761 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 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 [2020-07-19 21:44:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:33,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-19 21:44:33,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:33,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:33,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2020-07-19 21:44:33,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842370240] [2020-07-19 21:44:33,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 21:44:33,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:33,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 21:44:33,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:44:33,847 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand 11 states. [2020-07-19 21:44:34,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:34,305 INFO L93 Difference]: Finished difference Result 330 states and 438 transitions. [2020-07-19 21:44:34,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-19 21:44:34,306 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-07-19 21:44:34,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:34,311 INFO L225 Difference]: With dead ends: 330 [2020-07-19 21:44:34,311 INFO L226 Difference]: Without dead ends: 262 [2020-07-19 21:44:34,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-19 21:44:34,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-07-19 21:44:34,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 87. [2020-07-19 21:44:34,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-19 21:44:34,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 105 transitions. [2020-07-19 21:44:34,330 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 105 transitions. Word has length 47 [2020-07-19 21:44:34,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:34,331 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 105 transitions. [2020-07-19 21:44:34,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 21:44:34,331 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 105 transitions. [2020-07-19 21:44:34,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-19 21:44:34,332 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:34,332 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:34,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:34,546 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:34,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:34,547 INFO L82 PathProgramCache]: Analyzing trace with hash -635895248, now seen corresponding path program 3 times [2020-07-19 21:44:34,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:34,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323233516] [2020-07-19 21:44:34,548 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:44:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:34,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:34,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:34,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323233516] [2020-07-19 21:44:34,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61197185] [2020-07-19 21:44:34,685 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 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 [2020-07-19 21:44:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:34,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 21:44:34,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:34,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:34,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2020-07-19 21:44:34,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070733683] [2020-07-19 21:44:34,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 21:44:34,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:34,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 21:44:34,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-07-19 21:44:34,802 INFO L87 Difference]: Start difference. First operand 87 states and 105 transitions. Second operand 12 states. [2020-07-19 21:44:35,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:35,317 INFO L93 Difference]: Finished difference Result 361 states and 481 transitions. [2020-07-19 21:44:35,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 21:44:35,317 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-07-19 21:44:35,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:35,320 INFO L225 Difference]: With dead ends: 361 [2020-07-19 21:44:35,320 INFO L226 Difference]: Without dead ends: 293 [2020-07-19 21:44:35,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:44:35,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-07-19 21:44:35,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 89. [2020-07-19 21:44:35,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-07-19 21:44:35,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2020-07-19 21:44:35,343 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 49 [2020-07-19 21:44:35,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:35,344 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2020-07-19 21:44:35,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 21:44:35,344 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2020-07-19 21:44:35,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-19 21:44:35,350 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:35,350 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:35,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:35,565 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:35,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:35,565 INFO L82 PathProgramCache]: Analyzing trace with hash 507536206, now seen corresponding path program 4 times [2020-07-19 21:44:35,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:35,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522264782] [2020-07-19 21:44:35,566 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:44:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:35,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522264782] [2020-07-19 21:44:35,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836884333] [2020-07-19 21:44:35,687 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 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 [2020-07-19 21:44:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:35,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-19 21:44:35,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:35,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:35,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2020-07-19 21:44:35,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065086145] [2020-07-19 21:44:35,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 21:44:35,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:35,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 21:44:35,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-07-19 21:44:35,770 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand 13 states. [2020-07-19 21:44:36,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:36,244 INFO L93 Difference]: Finished difference Result 392 states and 524 transitions. [2020-07-19 21:44:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 21:44:36,244 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-07-19 21:44:36,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:36,257 INFO L225 Difference]: With dead ends: 392 [2020-07-19 21:44:36,257 INFO L226 Difference]: Without dead ends: 324 [2020-07-19 21:44:36,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2020-07-19 21:44:36,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-07-19 21:44:36,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 91. [2020-07-19 21:44:36,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-19 21:44:36,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2020-07-19 21:44:36,270 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 51 [2020-07-19 21:44:36,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:36,271 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2020-07-19 21:44:36,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 21:44:36,271 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2020-07-19 21:44:36,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-19 21:44:36,272 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:36,272 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:36,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-19 21:44:36,487 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:36,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:36,488 INFO L82 PathProgramCache]: Analyzing trace with hash -166464276, now seen corresponding path program 5 times [2020-07-19 21:44:36,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:36,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671226659] [2020-07-19 21:44:36,489 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:44:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:36,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:36,624 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:36,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671226659] [2020-07-19 21:44:36,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755989804] [2020-07-19 21:44:36,625 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 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 [2020-07-19 21:44:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:36,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 21:44:36,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:36,705 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:36,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:36,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2020-07-19 21:44:36,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860382333] [2020-07-19 21:44:36,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 21:44:36,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:36,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 21:44:36,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:44:36,708 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand 14 states. [2020-07-19 21:44:37,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:37,355 INFO L93 Difference]: Finished difference Result 423 states and 567 transitions. [2020-07-19 21:44:37,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 21:44:37,356 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-07-19 21:44:37,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:37,358 INFO L225 Difference]: With dead ends: 423 [2020-07-19 21:44:37,359 INFO L226 Difference]: Without dead ends: 355 [2020-07-19 21:44:37,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:44:37,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-07-19 21:44:37,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 93. [2020-07-19 21:44:37,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-19 21:44:37,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2020-07-19 21:44:37,378 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 53 [2020-07-19 21:44:37,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:37,379 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2020-07-19 21:44:37,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 21:44:37,379 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2020-07-19 21:44:37,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-19 21:44:37,381 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:37,381 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:37,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:37,595 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:37,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:37,596 INFO L82 PathProgramCache]: Analyzing trace with hash 659134218, now seen corresponding path program 6 times [2020-07-19 21:44:37,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:37,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372136918] [2020-07-19 21:44:37,597 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:44:37,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:37,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:37,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:37,771 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:37,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372136918] [2020-07-19 21:44:37,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420453161] [2020-07-19 21:44:37,772 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:37,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-19 21:44:37,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:37,863 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:37,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:37,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2020-07-19 21:44:37,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488023378] [2020-07-19 21:44:37,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 21:44:37,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:37,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 21:44:37,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-07-19 21:44:37,866 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand 15 states. [2020-07-19 21:44:38,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:38,560 INFO L93 Difference]: Finished difference Result 454 states and 610 transitions. [2020-07-19 21:44:38,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 21:44:38,560 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-07-19 21:44:38,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:38,563 INFO L225 Difference]: With dead ends: 454 [2020-07-19 21:44:38,563 INFO L226 Difference]: Without dead ends: 386 [2020-07-19 21:44:38,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2020-07-19 21:44:38,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-07-19 21:44:38,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 95. [2020-07-19 21:44:38,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-19 21:44:38,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2020-07-19 21:44:38,580 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 55 [2020-07-19 21:44:38,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:38,581 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2020-07-19 21:44:38,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 21:44:38,581 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2020-07-19 21:44:38,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-19 21:44:38,582 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:38,582 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:38,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:38,798 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:38,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:38,798 INFO L82 PathProgramCache]: Analyzing trace with hash -509662808, now seen corresponding path program 7 times [2020-07-19 21:44:38,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:38,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705288610] [2020-07-19 21:44:38,799 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:44:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:38,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:38,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705288610] [2020-07-19 21:44:38,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229444779] [2020-07-19 21:44:38,947 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:39,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 21:44:39,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:39,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:39,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2020-07-19 21:44:39,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114534348] [2020-07-19 21:44:39,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 21:44:39,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:39,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 21:44:39,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:44:39,033 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand 16 states. [2020-07-19 21:44:39,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:39,653 INFO L93 Difference]: Finished difference Result 485 states and 653 transitions. [2020-07-19 21:44:39,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-19 21:44:39,654 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-07-19 21:44:39,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:39,657 INFO L225 Difference]: With dead ends: 485 [2020-07-19 21:44:39,657 INFO L226 Difference]: Without dead ends: 417 [2020-07-19 21:44:39,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2020-07-19 21:44:39,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-07-19 21:44:39,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 97. [2020-07-19 21:44:39,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-07-19 21:44:39,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 115 transitions. [2020-07-19 21:44:39,670 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 115 transitions. Word has length 57 [2020-07-19 21:44:39,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:39,671 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 115 transitions. [2020-07-19 21:44:39,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 21:44:39,671 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 115 transitions. [2020-07-19 21:44:39,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-07-19 21:44:39,672 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:39,672 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:39,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-19 21:44:39,886 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:39,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:39,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1557826758, now seen corresponding path program 8 times [2020-07-19 21:44:39,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:39,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253952392] [2020-07-19 21:44:39,887 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:44:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:40,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:40,060 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:40,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253952392] [2020-07-19 21:44:40,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235083231] [2020-07-19 21:44:40,061 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:40,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:40,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-19 21:44:40,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:40,136 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:40,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:40,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2020-07-19 21:44:40,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833600847] [2020-07-19 21:44:40,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-19 21:44:40,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:40,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-19 21:44:40,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-07-19 21:44:40,139 INFO L87 Difference]: Start difference. First operand 97 states and 115 transitions. Second operand 17 states. [2020-07-19 21:44:40,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:40,989 INFO L93 Difference]: Finished difference Result 516 states and 696 transitions. [2020-07-19 21:44:40,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-19 21:44:40,990 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2020-07-19 21:44:40,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:40,994 INFO L225 Difference]: With dead ends: 516 [2020-07-19 21:44:40,995 INFO L226 Difference]: Without dead ends: 448 [2020-07-19 21:44:40,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2020-07-19 21:44:40,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2020-07-19 21:44:41,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 99. [2020-07-19 21:44:41,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-19 21:44:41,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2020-07-19 21:44:41,012 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 59 [2020-07-19 21:44:41,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:41,013 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2020-07-19 21:44:41,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-19 21:44:41,013 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2020-07-19 21:44:41,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-19 21:44:41,014 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:41,014 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:41,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-19 21:44:41,228 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:41,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:41,228 INFO L82 PathProgramCache]: Analyzing trace with hash -154558364, now seen corresponding path program 9 times [2020-07-19 21:44:41,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:41,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692096224] [2020-07-19 21:44:41,229 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:44:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:41,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692096224] [2020-07-19 21:44:41,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079459662] [2020-07-19 21:44:41,438 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:41,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-19 21:44:41,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:41,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:41,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2020-07-19 21:44:41,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074407598] [2020-07-19 21:44:41,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 21:44:41,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:41,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 21:44:41,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-07-19 21:44:41,533 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand 18 states. [2020-07-19 21:44:42,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:42,469 INFO L93 Difference]: Finished difference Result 547 states and 739 transitions. [2020-07-19 21:44:42,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-19 21:44:42,470 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2020-07-19 21:44:42,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:42,473 INFO L225 Difference]: With dead ends: 547 [2020-07-19 21:44:42,473 INFO L226 Difference]: Without dead ends: 479 [2020-07-19 21:44:42,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-07-19 21:44:42,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2020-07-19 21:44:42,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 101. [2020-07-19 21:44:42,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-19 21:44:42,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2020-07-19 21:44:42,493 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 61 [2020-07-19 21:44:42,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:42,493 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2020-07-19 21:44:42,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 21:44:42,493 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2020-07-19 21:44:42,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-07-19 21:44:42,494 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:42,495 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:42,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-19 21:44:42,708 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:42,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:42,708 INFO L82 PathProgramCache]: Analyzing trace with hash -784186238, now seen corresponding path program 10 times [2020-07-19 21:44:42,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:42,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767177539] [2020-07-19 21:44:42,709 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:44:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:42,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:42,931 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:42,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767177539] [2020-07-19 21:44:42,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952458225] [2020-07-19 21:44:42,933 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:42,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-19 21:44:42,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:43,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:43,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 19 [2020-07-19 21:44:43,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840334773] [2020-07-19 21:44:43,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-19 21:44:43,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:43,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-19 21:44:43,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-07-19 21:44:43,024 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand 19 states. [2020-07-19 21:44:43,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:43,892 INFO L93 Difference]: Finished difference Result 578 states and 782 transitions. [2020-07-19 21:44:43,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-19 21:44:43,893 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 63 [2020-07-19 21:44:43,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:43,896 INFO L225 Difference]: With dead ends: 578 [2020-07-19 21:44:43,896 INFO L226 Difference]: Without dead ends: 510 [2020-07-19 21:44:43,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2020-07-19 21:44:43,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2020-07-19 21:44:43,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 103. [2020-07-19 21:44:43,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-07-19 21:44:43,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2020-07-19 21:44:43,910 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 63 [2020-07-19 21:44:43,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:43,911 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2020-07-19 21:44:43,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-19 21:44:43,911 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2020-07-19 21:44:43,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-19 21:44:43,912 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:43,912 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:44,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:44,128 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:44,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:44,129 INFO L82 PathProgramCache]: Analyzing trace with hash -266184416, now seen corresponding path program 11 times [2020-07-19 21:44:44,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:44,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691673224] [2020-07-19 21:44:44,130 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:44:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:44,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:44,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:44,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691673224] [2020-07-19 21:44:44,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164963657] [2020-07-19 21:44:44,343 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:44,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-19 21:44:44,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:44,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:44,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 20 [2020-07-19 21:44:44,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393711589] [2020-07-19 21:44:44,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-19 21:44:44,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:44,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-19 21:44:44,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-07-19 21:44:44,441 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand 20 states. [2020-07-19 21:44:45,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:45,353 INFO L93 Difference]: Finished difference Result 609 states and 825 transitions. [2020-07-19 21:44:45,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-19 21:44:45,353 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 65 [2020-07-19 21:44:45,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:45,357 INFO L225 Difference]: With dead ends: 609 [2020-07-19 21:44:45,357 INFO L226 Difference]: Without dead ends: 541 [2020-07-19 21:44:45,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2020-07-19 21:44:45,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-07-19 21:44:45,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 105. [2020-07-19 21:44:45,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-07-19 21:44:45,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2020-07-19 21:44:45,373 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 65 [2020-07-19 21:44:45,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:45,373 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2020-07-19 21:44:45,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-19 21:44:45,373 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2020-07-19 21:44:45,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-19 21:44:45,374 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:45,374 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:45,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-19 21:44:45,588 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:45,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:45,588 INFO L82 PathProgramCache]: Analyzing trace with hash -682639810, now seen corresponding path program 12 times [2020-07-19 21:44:45,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:45,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613252090] [2020-07-19 21:44:45,589 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:44:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:45,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613252090] [2020-07-19 21:44:45,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634668753] [2020-07-19 21:44:45,790 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:45,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-19 21:44:45,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:45,911 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:45,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:45,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 21 [2020-07-19 21:44:45,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115761266] [2020-07-19 21:44:45,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-19 21:44:45,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:45,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-19 21:44:45,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-07-19 21:44:45,914 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand 21 states. [2020-07-19 21:44:47,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:47,024 INFO L93 Difference]: Finished difference Result 640 states and 868 transitions. [2020-07-19 21:44:47,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-19 21:44:47,024 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 67 [2020-07-19 21:44:47,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:47,030 INFO L225 Difference]: With dead ends: 640 [2020-07-19 21:44:47,030 INFO L226 Difference]: Without dead ends: 572 [2020-07-19 21:44:47,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2020-07-19 21:44:47,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2020-07-19 21:44:47,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 107. [2020-07-19 21:44:47,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-19 21:44:47,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 125 transitions. [2020-07-19 21:44:47,046 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 125 transitions. Word has length 67 [2020-07-19 21:44:47,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:47,047 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 125 transitions. [2020-07-19 21:44:47,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-19 21:44:47,047 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 125 transitions. [2020-07-19 21:44:47,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-19 21:44:47,047 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:47,048 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:47,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-19 21:44:47,253 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:47,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:47,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1464314916, now seen corresponding path program 13 times [2020-07-19 21:44:47,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:47,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293879748] [2020-07-19 21:44:47,254 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:44:47,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:47,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293879748] [2020-07-19 21:44:47,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013826530] [2020-07-19 21:44:47,513 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:47,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-19 21:44:47,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:47,599 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:47,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:47,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 22 [2020-07-19 21:44:47,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125211142] [2020-07-19 21:44:47,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-19 21:44:47,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:47,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-19 21:44:47,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-07-19 21:44:47,602 INFO L87 Difference]: Start difference. First operand 107 states and 125 transitions. Second operand 22 states. [2020-07-19 21:44:48,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:48,818 INFO L93 Difference]: Finished difference Result 671 states and 911 transitions. [2020-07-19 21:44:48,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-19 21:44:48,818 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 69 [2020-07-19 21:44:48,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:48,822 INFO L225 Difference]: With dead ends: 671 [2020-07-19 21:44:48,822 INFO L226 Difference]: Without dead ends: 603 [2020-07-19 21:44:48,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=333, Unknown=0, NotChecked=0, Total=552 [2020-07-19 21:44:48,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2020-07-19 21:44:48,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 109. [2020-07-19 21:44:48,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-19 21:44:48,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2020-07-19 21:44:48,839 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 69 [2020-07-19 21:44:48,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:48,839 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2020-07-19 21:44:48,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-19 21:44:48,839 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2020-07-19 21:44:48,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-07-19 21:44:48,840 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:48,840 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:49,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:49,055 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:49,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:49,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1034814982, now seen corresponding path program 14 times [2020-07-19 21:44:49,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:49,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230761751] [2020-07-19 21:44:49,056 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:44:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:49,294 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:49,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230761751] [2020-07-19 21:44:49,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080753973] [2020-07-19 21:44:49,295 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:49,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-19 21:44:49,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:49,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:49,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 23 [2020-07-19 21:44:49,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013496581] [2020-07-19 21:44:49,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-19 21:44:49,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:49,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-19 21:44:49,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-07-19 21:44:49,379 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand 23 states. [2020-07-19 21:44:50,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:50,510 INFO L93 Difference]: Finished difference Result 702 states and 954 transitions. [2020-07-19 21:44:50,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-19 21:44:50,510 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 71 [2020-07-19 21:44:50,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:50,514 INFO L225 Difference]: With dead ends: 702 [2020-07-19 21:44:50,514 INFO L226 Difference]: Without dead ends: 634 [2020-07-19 21:44:50,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2020-07-19 21:44:50,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2020-07-19 21:44:50,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 111. [2020-07-19 21:44:50,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-07-19 21:44:50,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 129 transitions. [2020-07-19 21:44:50,532 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 129 transitions. Word has length 71 [2020-07-19 21:44:50,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:50,533 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 129 transitions. [2020-07-19 21:44:50,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-19 21:44:50,533 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 129 transitions. [2020-07-19 21:44:50,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-19 21:44:50,533 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:50,534 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:50,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:50,748 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:50,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:50,748 INFO L82 PathProgramCache]: Analyzing trace with hash -602238824, now seen corresponding path program 15 times [2020-07-19 21:44:50,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:50,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894431813] [2020-07-19 21:44:50,749 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:44:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:51,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:51,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894431813] [2020-07-19 21:44:51,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957379702] [2020-07-19 21:44:51,094 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:51,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-19 21:44:51,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:51,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:51,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 24 [2020-07-19 21:44:51,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192439826] [2020-07-19 21:44:51,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-19 21:44:51,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:51,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-19 21:44:51,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-07-19 21:44:51,243 INFO L87 Difference]: Start difference. First operand 111 states and 129 transitions. Second operand 24 states. [2020-07-19 21:44:52,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:52,757 INFO L93 Difference]: Finished difference Result 733 states and 997 transitions. [2020-07-19 21:44:52,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-19 21:44:52,757 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 73 [2020-07-19 21:44:52,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:52,761 INFO L225 Difference]: With dead ends: 733 [2020-07-19 21:44:52,762 INFO L226 Difference]: Without dead ends: 665 [2020-07-19 21:44:52,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=388, Unknown=0, NotChecked=0, Total=650 [2020-07-19 21:44:52,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2020-07-19 21:44:52,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 113. [2020-07-19 21:44:52,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-07-19 21:44:52,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 131 transitions. [2020-07-19 21:44:52,781 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 131 transitions. Word has length 73 [2020-07-19 21:44:52,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:52,782 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 131 transitions. [2020-07-19 21:44:52,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-19 21:44:52,782 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 131 transitions. [2020-07-19 21:44:52,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-07-19 21:44:52,782 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:52,783 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:52,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:52,997 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:52,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:52,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1508378698, now seen corresponding path program 16 times [2020-07-19 21:44:52,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:52,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439277037] [2020-07-19 21:44:52,998 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:44:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:53,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:53,317 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:53,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439277037] [2020-07-19 21:44:53,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612975466] [2020-07-19 21:44:53,318 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:53,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-19 21:44:53,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:53,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:53,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 25 [2020-07-19 21:44:53,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088748511] [2020-07-19 21:44:53,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-19 21:44:53,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:53,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-19 21:44:53,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-07-19 21:44:53,431 INFO L87 Difference]: Start difference. First operand 113 states and 131 transitions. Second operand 25 states. [2020-07-19 21:44:54,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:54,697 INFO L93 Difference]: Finished difference Result 764 states and 1040 transitions. [2020-07-19 21:44:54,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-19 21:44:54,699 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 75 [2020-07-19 21:44:54,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:54,704 INFO L225 Difference]: With dead ends: 764 [2020-07-19 21:44:54,704 INFO L226 Difference]: Without dead ends: 696 [2020-07-19 21:44:54,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2020-07-19 21:44:54,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2020-07-19 21:44:54,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 115. [2020-07-19 21:44:54,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-07-19 21:44:54,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2020-07-19 21:44:54,724 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 75 [2020-07-19 21:44:54,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:54,724 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2020-07-19 21:44:54,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-19 21:44:54,725 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2020-07-19 21:44:54,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-07-19 21:44:54,725 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:54,725 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:54,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-19 21:44:54,941 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:54,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:54,941 INFO L82 PathProgramCache]: Analyzing trace with hash -430436524, now seen corresponding path program 17 times [2020-07-19 21:44:54,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:54,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030236102] [2020-07-19 21:44:54,942 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:44:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:55,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:55,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:55,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030236102] [2020-07-19 21:44:55,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297943287] [2020-07-19 21:44:55,288 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:55,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-19 21:44:55,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:55,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:55,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 26 [2020-07-19 21:44:55,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436110180] [2020-07-19 21:44:55,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-19 21:44:55,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:55,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-19 21:44:55,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-07-19 21:44:55,413 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand 26 states. [2020-07-19 21:44:56,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:56,836 INFO L93 Difference]: Finished difference Result 795 states and 1083 transitions. [2020-07-19 21:44:56,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-19 21:44:56,837 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 77 [2020-07-19 21:44:56,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:56,841 INFO L225 Difference]: With dead ends: 795 [2020-07-19 21:44:56,841 INFO L226 Difference]: Without dead ends: 727 [2020-07-19 21:44:56,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2020-07-19 21:44:56,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2020-07-19 21:44:56,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 117. [2020-07-19 21:44:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-19 21:44:56,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 135 transitions. [2020-07-19 21:44:56,866 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 135 transitions. Word has length 77 [2020-07-19 21:44:56,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:56,867 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 135 transitions. [2020-07-19 21:44:56,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-19 21:44:56,867 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 135 transitions. [2020-07-19 21:44:56,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-19 21:44:56,868 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:56,868 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:57,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-07-19 21:44:57,081 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:57,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:57,081 INFO L82 PathProgramCache]: Analyzing trace with hash 384874354, now seen corresponding path program 18 times [2020-07-19 21:44:57,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:57,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341287285] [2020-07-19 21:44:57,082 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:44:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:57,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:57,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341287285] [2020-07-19 21:44:57,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896402749] [2020-07-19 21:44:57,435 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:57,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:57,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-19 21:44:57,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:57,513 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:57,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:57,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 27 [2020-07-19 21:44:57,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642670713] [2020-07-19 21:44:57,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-19 21:44:57,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:57,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-19 21:44:57,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-07-19 21:44:57,516 INFO L87 Difference]: Start difference. First operand 117 states and 135 transitions. Second operand 27 states. [2020-07-19 21:44:59,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:59,090 INFO L93 Difference]: Finished difference Result 826 states and 1126 transitions. [2020-07-19 21:44:59,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-19 21:44:59,091 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2020-07-19 21:44:59,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:59,095 INFO L225 Difference]: With dead ends: 826 [2020-07-19 21:44:59,095 INFO L226 Difference]: Without dead ends: 758 [2020-07-19 21:44:59,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2020-07-19 21:44:59,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2020-07-19 21:44:59,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 119. [2020-07-19 21:44:59,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-07-19 21:44:59,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 137 transitions. [2020-07-19 21:44:59,120 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 137 transitions. Word has length 79 [2020-07-19 21:44:59,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:59,120 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 137 transitions. [2020-07-19 21:44:59,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-19 21:44:59,120 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 137 transitions. [2020-07-19 21:44:59,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-19 21:44:59,121 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:59,121 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:44:59,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:59,335 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:59,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:59,335 INFO L82 PathProgramCache]: Analyzing trace with hash -2080387056, now seen corresponding path program 19 times [2020-07-19 21:44:59,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:59,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886711073] [2020-07-19 21:44:59,336 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:44:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:59,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886711073] [2020-07-19 21:44:59,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592780735] [2020-07-19 21:44:59,741 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:59,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-19 21:44:59,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:44:59,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:44:59,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 28 [2020-07-19 21:44:59,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201644328] [2020-07-19 21:44:59,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-19 21:44:59,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:59,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-19 21:44:59,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-07-19 21:44:59,827 INFO L87 Difference]: Start difference. First operand 119 states and 137 transitions. Second operand 28 states. [2020-07-19 21:45:01,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:01,408 INFO L93 Difference]: Finished difference Result 857 states and 1169 transitions. [2020-07-19 21:45:01,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-19 21:45:01,409 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 81 [2020-07-19 21:45:01,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:01,412 INFO L225 Difference]: With dead ends: 857 [2020-07-19 21:45:01,412 INFO L226 Difference]: Without dead ends: 789 [2020-07-19 21:45:01,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=360, Invalid=510, Unknown=0, NotChecked=0, Total=870 [2020-07-19 21:45:01,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2020-07-19 21:45:01,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 121. [2020-07-19 21:45:01,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-19 21:45:01,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 139 transitions. [2020-07-19 21:45:01,439 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 139 transitions. Word has length 81 [2020-07-19 21:45:01,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:01,439 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 139 transitions. [2020-07-19 21:45:01,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-19 21:45:01,439 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 139 transitions. [2020-07-19 21:45:01,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-19 21:45:01,440 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:01,440 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:01,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-07-19 21:45:01,649 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:01,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:01,650 INFO L82 PathProgramCache]: Analyzing trace with hash -374654674, now seen corresponding path program 20 times [2020-07-19 21:45:01,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:01,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462217341] [2020-07-19 21:45:01,650 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:45:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:01,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:01,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:45:02,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462217341] [2020-07-19 21:45:02,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164193715] [2020-07-19 21:45:02,007 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:02,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-19 21:45:02,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:45:02,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:02,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 29 [2020-07-19 21:45:02,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127917686] [2020-07-19 21:45:02,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-19 21:45:02,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:02,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-19 21:45:02,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-07-19 21:45:02,108 INFO L87 Difference]: Start difference. First operand 121 states and 139 transitions. Second operand 29 states. [2020-07-19 21:45:04,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:04,143 INFO L93 Difference]: Finished difference Result 888 states and 1212 transitions. [2020-07-19 21:45:04,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-19 21:45:04,145 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 83 [2020-07-19 21:45:04,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:04,149 INFO L225 Difference]: With dead ends: 888 [2020-07-19 21:45:04,149 INFO L226 Difference]: Without dead ends: 820 [2020-07-19 21:45:04,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=387, Invalid=543, Unknown=0, NotChecked=0, Total=930 [2020-07-19 21:45:04,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2020-07-19 21:45:04,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 123. [2020-07-19 21:45:04,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-07-19 21:45:04,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 141 transitions. [2020-07-19 21:45:04,181 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 141 transitions. Word has length 83 [2020-07-19 21:45:04,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:04,182 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 141 transitions. [2020-07-19 21:45:04,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-19 21:45:04,182 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 141 transitions. [2020-07-19 21:45:04,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-19 21:45:04,183 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:04,183 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:04,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:04,397 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:04,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:04,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1843342644, now seen corresponding path program 21 times [2020-07-19 21:45:04,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:04,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730885269] [2020-07-19 21:45:04,398 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:45:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:04,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:04,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:45:04,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730885269] [2020-07-19 21:45:04,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285319901] [2020-07-19 21:45:04,839 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:04,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-19 21:45:04,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:04,940 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:45:04,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:04,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 30 [2020-07-19 21:45:04,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355004197] [2020-07-19 21:45:04,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-19 21:45:04,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:04,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-19 21:45:04,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-07-19 21:45:04,943 INFO L87 Difference]: Start difference. First operand 123 states and 141 transitions. Second operand 30 states. [2020-07-19 21:45:06,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:06,815 INFO L93 Difference]: Finished difference Result 919 states and 1255 transitions. [2020-07-19 21:45:06,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-19 21:45:06,815 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 85 [2020-07-19 21:45:06,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:06,819 INFO L225 Difference]: With dead ends: 919 [2020-07-19 21:45:06,819 INFO L226 Difference]: Without dead ends: 851 [2020-07-19 21:45:06,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=415, Invalid=577, Unknown=0, NotChecked=0, Total=992 [2020-07-19 21:45:06,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2020-07-19 21:45:06,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 125. [2020-07-19 21:45:06,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-07-19 21:45:06,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 143 transitions. [2020-07-19 21:45:06,847 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 143 transitions. Word has length 85 [2020-07-19 21:45:06,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:06,848 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 143 transitions. [2020-07-19 21:45:06,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-19 21:45:06,848 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 143 transitions. [2020-07-19 21:45:06,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-07-19 21:45:06,849 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:06,849 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:07,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-07-19 21:45:07,063 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:07,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:07,063 INFO L82 PathProgramCache]: Analyzing trace with hash -208241430, now seen corresponding path program 22 times [2020-07-19 21:45:07,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:07,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692484235] [2020-07-19 21:45:07,063 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:45:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:07,498 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:45:07,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692484235] [2020-07-19 21:45:07,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938278584] [2020-07-19 21:45:07,498 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:07,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-19 21:45:07,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:07,588 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:45:07,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:07,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28] total 31 [2020-07-19 21:45:07,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459329002] [2020-07-19 21:45:07,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-19 21:45:07,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:07,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-19 21:45:07,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-07-19 21:45:07,591 INFO L87 Difference]: Start difference. First operand 125 states and 143 transitions. Second operand 31 states. [2020-07-19 21:45:09,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:09,688 INFO L93 Difference]: Finished difference Result 950 states and 1298 transitions. [2020-07-19 21:45:09,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-19 21:45:09,688 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 87 [2020-07-19 21:45:09,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:09,693 INFO L225 Difference]: With dead ends: 950 [2020-07-19 21:45:09,693 INFO L226 Difference]: Without dead ends: 882 [2020-07-19 21:45:09,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=444, Invalid=612, Unknown=0, NotChecked=0, Total=1056 [2020-07-19 21:45:09,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2020-07-19 21:45:09,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 127. [2020-07-19 21:45:09,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-07-19 21:45:09,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 145 transitions. [2020-07-19 21:45:09,724 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 145 transitions. Word has length 87 [2020-07-19 21:45:09,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:09,725 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 145 transitions. [2020-07-19 21:45:09,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-19 21:45:09,725 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 145 transitions. [2020-07-19 21:45:09,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-07-19 21:45:09,726 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:09,726 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:09,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-07-19 21:45:09,940 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:09,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:09,940 INFO L82 PathProgramCache]: Analyzing trace with hash -834005112, now seen corresponding path program 23 times [2020-07-19 21:45:09,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:09,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339982993] [2020-07-19 21:45:09,941 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:45:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:10,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:10,437 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:45:10,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339982993] [2020-07-19 21:45:10,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887675481] [2020-07-19 21:45:10,438 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:10,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:10,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-19 21:45:10,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:45:10,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:10,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 32 [2020-07-19 21:45:10,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683683668] [2020-07-19 21:45:10,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-19 21:45:10,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:10,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-19 21:45:10,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-07-19 21:45:10,554 INFO L87 Difference]: Start difference. First operand 127 states and 145 transitions. Second operand 32 states. [2020-07-19 21:45:13,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:13,032 INFO L93 Difference]: Finished difference Result 981 states and 1341 transitions. [2020-07-19 21:45:13,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-19 21:45:13,033 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 89 [2020-07-19 21:45:13,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:13,038 INFO L225 Difference]: With dead ends: 981 [2020-07-19 21:45:13,038 INFO L226 Difference]: Without dead ends: 913 [2020-07-19 21:45:13,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=474, Invalid=648, Unknown=0, NotChecked=0, Total=1122 [2020-07-19 21:45:13,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2020-07-19 21:45:13,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 129. [2020-07-19 21:45:13,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-19 21:45:13,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 147 transitions. [2020-07-19 21:45:13,073 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 147 transitions. Word has length 89 [2020-07-19 21:45:13,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:13,073 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 147 transitions. [2020-07-19 21:45:13,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-19 21:45:13,073 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 147 transitions. [2020-07-19 21:45:13,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-19 21:45:13,074 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:13,074 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:13,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-07-19 21:45:13,289 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:13,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:13,289 INFO L82 PathProgramCache]: Analyzing trace with hash -897482074, now seen corresponding path program 24 times [2020-07-19 21:45:13,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:13,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582590543] [2020-07-19 21:45:13,290 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:45:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:45:13,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582590543] [2020-07-19 21:45:13,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059777113] [2020-07-19 21:45:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:13,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-19 21:45:13,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:45:13,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:13,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30] total 33 [2020-07-19 21:45:13,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620803252] [2020-07-19 21:45:13,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-19 21:45:13,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:13,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-19 21:45:13,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2020-07-19 21:45:13,892 INFO L87 Difference]: Start difference. First operand 129 states and 147 transitions. Second operand 33 states. [2020-07-19 21:45:16,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:16,707 INFO L93 Difference]: Finished difference Result 1012 states and 1384 transitions. [2020-07-19 21:45:16,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-19 21:45:16,708 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 91 [2020-07-19 21:45:16,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:16,711 INFO L225 Difference]: With dead ends: 1012 [2020-07-19 21:45:16,711 INFO L226 Difference]: Without dead ends: 944 [2020-07-19 21:45:16,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=505, Invalid=685, Unknown=0, NotChecked=0, Total=1190 [2020-07-19 21:45:16,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2020-07-19 21:45:16,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 131. [2020-07-19 21:45:16,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-07-19 21:45:16,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-07-19 21:45:16,737 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 91 [2020-07-19 21:45:16,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:16,737 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-07-19 21:45:16,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-19 21:45:16,737 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-07-19 21:45:16,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-19 21:45:16,738 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:16,738 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:16,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:16,939 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:16,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:16,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1769300412, now seen corresponding path program 25 times [2020-07-19 21:45:16,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:16,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778332420] [2020-07-19 21:45:16,940 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:45:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:16,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:16,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-07-19 21:45:17,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778332420] [2020-07-19 21:45:17,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:45:17,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-19 21:45:17,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703142023] [2020-07-19 21:45:17,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 21:45:17,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:17,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 21:45:17,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:45:17,025 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 6 states. [2020-07-19 21:45:17,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:17,192 INFO L93 Difference]: Finished difference Result 187 states and 222 transitions. [2020-07-19 21:45:17,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:45:17,193 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-07-19 21:45:17,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:17,194 INFO L225 Difference]: With dead ends: 187 [2020-07-19 21:45:17,195 INFO L226 Difference]: Without dead ends: 139 [2020-07-19 21:45:17,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:45:17,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-07-19 21:45:17,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-07-19 21:45:17,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-19 21:45:17,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2020-07-19 21:45:17,223 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 93 [2020-07-19 21:45:17,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:17,223 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2020-07-19 21:45:17,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 21:45:17,223 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2020-07-19 21:45:17,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-19 21:45:17,224 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:17,225 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:17,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-07-19 21:45:17,225 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:17,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:17,225 INFO L82 PathProgramCache]: Analyzing trace with hash -351711109, now seen corresponding path program 1 times [2020-07-19 21:45:17,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:17,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023362664] [2020-07-19 21:45:17,226 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b8ba61 [2020-07-19 21:45:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:17,323 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-07-19 21:45:17,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023362664] [2020-07-19 21:45:17,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:45:17,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-19 21:45:17,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707274775] [2020-07-19 21:45:17,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 21:45:17,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:17,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 21:45:17,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:45:17,324 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand 7 states. [2020-07-19 21:45:17,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:17,462 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2020-07-19 21:45:17,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 21:45:17,465 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-07-19 21:45:17,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:17,465 INFO L225 Difference]: With dead ends: 157 [2020-07-19 21:45:17,465 INFO L226 Difference]: Without dead ends: 0 [2020-07-19 21:45:17,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:45:17,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-19 21:45:17,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-19 21:45:17,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-19 21:45:17,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-19 21:45:17,467 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 93 [2020-07-19 21:45:17,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:17,467 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-19 21:45:17,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 21:45:17,467 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-19 21:45:17,467 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-19 21:45:17,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-07-19 21:45:17,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-19 21:45:17,828 INFO L271 CegarLoopResult]: At program point elem_existsENTRY(lines 9 15) the Hoare annotation is: true [2020-07-19 21:45:17,828 INFO L268 CegarLoopResult]: For program point elem_existsEXIT(lines 9 15) no Hoare annotation was computed. [2020-07-19 21:45:17,828 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-07-19 21:45:17,828 INFO L268 CegarLoopResult]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2020-07-19 21:45:17,828 INFO L268 CegarLoopResult]: For program point elem_existsFINAL(lines 9 15) no Hoare annotation was computed. [2020-07-19 21:45:17,829 INFO L264 CegarLoopResult]: At program point L11-3(lines 11 13) the Hoare annotation is: (and (= elem_exists_~size |elem_exists_#in~size|) (<= 0 elem_exists_~i~0)) [2020-07-19 21:45:17,829 INFO L268 CegarLoopResult]: For program point L11-4(lines 11 13) no Hoare annotation was computed. [2020-07-19 21:45:17,829 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-19 21:45:17,829 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#valid| |old(#valid)|) (= |old(#NULL.base)| |#NULL.base|) (= |#NULL.offset| |old(#NULL.offset)|)) [2020-07-19 21:45:17,829 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:45:17,829 INFO L271 CegarLoopResult]: At program point insertENTRY(lines 5 8) the Hoare annotation is: true [2020-07-19 21:45:17,829 INFO L268 CegarLoopResult]: For program point insertFINAL(lines 5 8) no Hoare annotation was computed. [2020-07-19 21:45:17,829 INFO L268 CegarLoopResult]: For program point insertEXIT(lines 5 8) no Hoare annotation was computed. [2020-07-19 21:45:17,830 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:45:17,830 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-19 21:45:17,830 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-19 21:45:17,830 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-19 21:45:17,830 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 56) no Hoare annotation was computed. [2020-07-19 21:45:17,830 INFO L264 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: false [2020-07-19 21:45:17,830 INFO L268 CegarLoopResult]: For program point L52-1(line 52) no Hoare annotation was computed. [2020-07-19 21:45:17,831 INFO L268 CegarLoopResult]: For program point L44-2(lines 44 48) no Hoare annotation was computed. [2020-07-19 21:45:17,831 INFO L264 CegarLoopResult]: At program point L44-3(lines 44 48) the Hoare annotation is: (and (= 0 main_~n~0) (= 0 main_~x~0)) [2020-07-19 21:45:17,831 INFO L268 CegarLoopResult]: For program point L36-2(lines 36 39) no Hoare annotation was computed. [2020-07-19 21:45:17,831 INFO L264 CegarLoopResult]: At program point L36-3(lines 36 39) the Hoare annotation is: (and (= 0 main_~n~0) (= 0 main_~x~0)) [2020-07-19 21:45:17,831 INFO L268 CegarLoopResult]: For program point L36-4(lines 36 39) no Hoare annotation was computed. [2020-07-19 21:45:17,831 INFO L268 CegarLoopResult]: For program point L28-2(lines 28 32) no Hoare annotation was computed. [2020-07-19 21:45:17,831 INFO L264 CegarLoopResult]: At program point L28-3(lines 28 32) the Hoare annotation is: (and (= 0 main_~n~0) (= 0 main_~x~0)) [2020-07-19 21:45:17,832 INFO L268 CegarLoopResult]: For program point L28-4(lines 28 32) no Hoare annotation was computed. [2020-07-19 21:45:17,832 INFO L268 CegarLoopResult]: For program point L45-2(lines 45 47) no Hoare annotation was computed. [2020-07-19 21:45:17,832 INFO L264 CegarLoopResult]: At program point L45-3(lines 45 47) the Hoare annotation is: false [2020-07-19 21:45:17,832 INFO L268 CegarLoopResult]: For program point L29-2(lines 29 31) no Hoare annotation was computed. [2020-07-19 21:45:17,833 INFO L264 CegarLoopResult]: At program point L29-3(lines 29 31) the Hoare annotation is: false [2020-07-19 21:45:17,833 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: false [2020-07-19 21:45:17,833 INFO L268 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-07-19 21:45:17,833 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 56) no Hoare annotation was computed. [2020-07-19 21:45:17,833 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: false [2020-07-19 21:45:17,833 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 16 56) the Hoare annotation is: (and (= |#valid| |old(#valid)|) (= |#memory_int| |old(#memory_int)|)) [2020-07-19 21:45:17,833 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-07-19 21:45:17,833 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 25) no Hoare annotation was computed. [2020-07-19 21:45:17,834 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 25) the Hoare annotation is: (= 0 main_~n~0) [2020-07-19 21:45:17,834 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 25) no Hoare annotation was computed. [2020-07-19 21:45:17,834 INFO L268 CegarLoopResult]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2020-07-19 21:45:17,835 INFO L264 CegarLoopResult]: At program point L40-3(lines 40 49) the Hoare annotation is: (and (= 0 main_~n~0) (= 0 main_~x~0)) [2020-07-19 21:45:17,835 INFO L268 CegarLoopResult]: For program point L40-4(lines 40 49) no Hoare annotation was computed. [2020-07-19 21:45:17,835 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (= 0 main_~n~0) (= 0 main_~x~0)) [2020-07-19 21:45:17,835 INFO L268 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-07-19 21:45:17,835 INFO L268 CegarLoopResult]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2020-07-19 21:45:17,835 INFO L268 CegarLoopResult]: For program point L41-4(lines 41 43) no Hoare annotation was computed. [2020-07-19 21:45:17,835 INFO L268 CegarLoopResult]: For program point L50-2(lines 50 54) no Hoare annotation was computed. [2020-07-19 21:45:17,836 INFO L264 CegarLoopResult]: At program point L50-3(lines 50 54) the Hoare annotation is: (and (= 0 main_~n~0) (= 0 main_~x~0)) [2020-07-19 21:45:17,837 INFO L268 CegarLoopResult]: For program point L50-4(lines 50 54) no Hoare annotation was computed. [2020-07-19 21:45:17,837 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: false [2020-07-19 21:45:17,837 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-07-19 21:45:17,837 INFO L268 CegarLoopResult]: For program point L51-2(lines 51 53) no Hoare annotation was computed. [2020-07-19 21:45:17,837 INFO L264 CegarLoopResult]: At program point L51-3(lines 51 53) the Hoare annotation is: false [2020-07-19 21:45:17,838 INFO L268 CegarLoopResult]: For program point L2-1(line 2) no Hoare annotation was computed. [2020-07-19 21:45:17,838 INFO L268 CegarLoopResult]: For program point L2-3(line 2) no Hoare annotation was computed. [2020-07-19 21:45:17,838 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2020-07-19 21:45:17,838 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2020-07-19 21:45:17,838 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2020-07-19 21:45:17,839 INFO L268 CegarLoopResult]: For program point L2(line 2) no Hoare annotation was computed. [2020-07-19 21:45:17,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:45:17 BoogieIcfgContainer [2020-07-19 21:45:17,863 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 21:45:17,865 INFO L168 Benchmark]: Toolchain (without parser) took 50208.97 ms. Allocated memory was 138.4 MB in the beginning and 518.5 MB in the end (delta: 380.1 MB). Free memory was 101.5 MB in the beginning and 245.3 MB in the end (delta: -143.8 MB). Peak memory consumption was 236.3 MB. Max. memory is 7.1 GB. [2020-07-19 21:45:17,868 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-19 21:45:17,869 INFO L168 Benchmark]: CACSL2BoogieTranslator took 538.78 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 101.1 MB in the beginning and 180.0 MB in the end (delta: -78.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. [2020-07-19 21:45:17,869 INFO L168 Benchmark]: Boogie Preprocessor took 94.50 ms. Allocated memory is still 202.4 MB. Free memory was 180.0 MB in the beginning and 177.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-07-19 21:45:17,870 INFO L168 Benchmark]: RCFGBuilder took 494.05 ms. Allocated memory is still 202.4 MB. Free memory was 177.7 MB in the beginning and 154.0 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-07-19 21:45:17,870 INFO L168 Benchmark]: TraceAbstraction took 49075.17 ms. Allocated memory was 202.4 MB in the beginning and 518.5 MB in the end (delta: 316.1 MB). Free memory was 154.0 MB in the beginning and 245.3 MB in the end (delta: -91.3 MB). Peak memory consumption was 224.8 MB. Max. memory is 7.1 GB. [2020-07-19 21:45:17,872 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 538.78 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 101.1 MB in the beginning and 180.0 MB in the end (delta: -78.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 94.50 ms. Allocated memory is still 202.4 MB. Free memory was 180.0 MB in the beginning and 177.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 494.05 ms. Allocated memory is still 202.4 MB. Free memory was 177.7 MB in the beginning and 154.0 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 49075.17 ms. Allocated memory was 202.4 MB in the beginning and 518.5 MB in the end (delta: 316.1 MB). Free memory was 154.0 MB in the beginning and 245.3 MB in the end (delta: -91.3 MB). Peak memory consumption was 224.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 0 == n && 0 == x - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 0 == n - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 0 == n && 0 == x - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: 0 == n && 0 == x - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: size == \old(size) && 0 <= i - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: 0 == n && 0 == x - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: 0 == n && 0 == x - InvariantResult [Line: 51]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 48.6s, OverallIterations: 32, TraceHistogramMax: 28, AutomataDifference: 31.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3304 SDtfs, 10683 SDslu, 14172 SDs, 0 SdLazy, 27216 SolverSat, 5760 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2437 GetRequests, 1867 SyntacticMatches, 0 SemanticMatches, 570 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1573 ImplicationChecksByTransitivity, 6.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=137occurred in iteration=31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 32 MinimizatonAttempts, 11933 StatesRemovedByMinimization, 31 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 22 LocationsWithAnnotation, 335 PreInvPairs, 375 NumberOfFragments, 81 HoareAnnotationTreeSize, 335 FomulaSimplifications, 503 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 22 FomulaSimplificationsInter, 48 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 7.2s InterpolantComputationTime, 3672 NumberOfCodeBlocks, 3672 NumberOfCodeBlocksAsserted, 60 NumberOfCheckSat, 3612 ConstructedInterpolants, 0 QuantifiedInterpolants, 508871 SizeOfPredicates, 28 NumberOfNonLiveVariables, 6204 ConjunctsInSsa, 434 ConjunctsInUnsatCore, 60 InterpolantComputations, 5 PerfectInterpolantSequences, 1809/15670 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...