/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 FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:03:17,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 22:03:17,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 22:03:17,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 22:03:17,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 22:03:17,540 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 22:03:17,541 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 22:03:17,543 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 22:03:17,545 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 22:03:17,546 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 22:03:17,547 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 22:03:17,548 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 22:03:17,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:03:17,549 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:03:17,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:03:17,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:03:17,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:03:17,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:03:17,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:03:17,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:03:17,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:03:17,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:03:17,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:03:17,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:03:17,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 22:03:17,564 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 22:03:17,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 22:03:17,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 22:03:17,566 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 22:03:17,567 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 22:03:17,567 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 22:03:17,568 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 22:03:17,568 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 22:03:17,569 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 22:03:17,570 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 22:03:17,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 22:03:17,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 22:03:17,571 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 22:03:17,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:03:17,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:03:17,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:03:17,574 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 22:03:17,598 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:03:17,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:03:17,602 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:03:17,603 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:03:17,603 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:03:17,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:03:17,603 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:03:17,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:03:17,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:03:17,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:03:17,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:03:17,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:03:17,604 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:03:17,605 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:03:17,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:03:17,605 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:03:17,605 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:03:17,605 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:03:17,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:03:17,606 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:03:17,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:03:17,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:03:17,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:03:17,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:03:17,607 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:03:17,607 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:03:17,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:03:17,608 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:03:17,608 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:03:17,608 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 22:03:17,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:03:17,924 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:03:17,928 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:03:17,930 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:03:17,930 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:03:17,931 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-08-18 22:03:17,993 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76d4ba9f3/473659457d144020b0340c914ccf46fe/FLAG195e62311 [2020-08-18 22:03:18,457 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:03:18,457 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-08-18 22:03:18,466 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76d4ba9f3/473659457d144020b0340c914ccf46fe/FLAG195e62311 [2020-08-18 22:03:18,845 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76d4ba9f3/473659457d144020b0340c914ccf46fe [2020-08-18 22:03:18,854 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:03:18,856 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:03:18,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:03:18,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:03:18,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:03:18,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:03:18" (1/1) ... [2020-08-18 22:03:18,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70ed35ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:18, skipping insertion in model container [2020-08-18 22:03:18,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:03:18" (1/1) ... [2020-08-18 22:03:18,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:03:18,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:03:19,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:03:19,278 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:03:19,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:03:19,390 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:03:19,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:19 WrapperNode [2020-08-18 22:03:19,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:03:19,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:03:19,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:03:19,392 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:03:19,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:19" (1/1) ... [2020-08-18 22:03:19,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:19" (1/1) ... [2020-08-18 22:03:19,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:19" (1/1) ... [2020-08-18 22:03:19,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:19" (1/1) ... [2020-08-18 22:03:19,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:19" (1/1) ... [2020-08-18 22:03:19,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:19" (1/1) ... [2020-08-18 22:03:19,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:19" (1/1) ... [2020-08-18 22:03:19,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:03:19,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:03:19,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:03:19,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:03:19,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 22:03:19,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:03:19,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:03:19,535 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:03:19,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:03:19,538 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-08-18 22:03:19,538 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-18 22:03:19,538 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:03:19,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 22:03:19,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 22:03:19,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 22:03:19,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 22:03:19,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 22:03:19,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 22:03:19,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:03:19,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:03:19,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 22:03:19,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 22:03:22,363 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:03:22,364 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 22:03:22,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:03:22 BoogieIcfgContainer [2020-08-18 22:03:22,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:03:22,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:03:22,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:03:22,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:03:22,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:03:18" (1/3) ... [2020-08-18 22:03:22,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a01397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:03:22, skipping insertion in model container [2020-08-18 22:03:22,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:19" (2/3) ... [2020-08-18 22:03:22,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a01397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:03:22, skipping insertion in model container [2020-08-18 22:03:22,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:03:22" (3/3) ... [2020-08-18 22:03:22,387 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.c [2020-08-18 22:03:22,398 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:03:22,405 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:03:22,420 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:03:22,445 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:03:22,446 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:03:22,446 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:03:22,446 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:03:22,447 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:03:22,447 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:03:22,447 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:03:22,447 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:03:22,468 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-18 22:03:22,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 22:03:22,474 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:22,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:22,475 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:22,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:22,481 INFO L82 PathProgramCache]: Analyzing trace with hash 316900320, now seen corresponding path program 1 times [2020-08-18 22:03:22,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:22,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103213888] [2020-08-18 22:03:22,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:03:22,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103213888] [2020-08-18 22:03:22,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:03:22,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:03:22,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992673030] [2020-08-18 22:03:22,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:03:22,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:22,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:03:22,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:03:22,990 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-08-18 22:03:25,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:25,196 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2020-08-18 22:03:25,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:03:25,199 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 22:03:25,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:25,215 INFO L225 Difference]: With dead ends: 46 [2020-08-18 22:03:25,216 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 22:03:25,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:03:25,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 22:03:25,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2020-08-18 22:03:25,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 22:03:25,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-18 22:03:25,271 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-18 22:03:25,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:25,271 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-18 22:03:25,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:03:25,272 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-18 22:03:25,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 22:03:25,273 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:25,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:25,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:03:25,274 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:25,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:25,275 INFO L82 PathProgramCache]: Analyzing trace with hash 316483246, now seen corresponding path program 1 times [2020-08-18 22:03:25,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:25,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840900230] [2020-08-18 22:03:25,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:25,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:25,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:03:25,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840900230] [2020-08-18 22:03:25,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:03:25,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:03:25,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125782791] [2020-08-18 22:03:25,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:03:25,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:25,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:03:25,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:03:25,436 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-08-18 22:03:27,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:27,562 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-08-18 22:03:27,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:03:27,563 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 22:03:27,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:27,564 INFO L225 Difference]: With dead ends: 28 [2020-08-18 22:03:27,564 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 22:03:27,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:03:27,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 22:03:27,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2020-08-18 22:03:27,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-18 22:03:27,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-18 22:03:27,571 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2020-08-18 22:03:27,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:27,572 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-18 22:03:27,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:03:27,572 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-18 22:03:27,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 22:03:27,573 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:27,573 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:27,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:03:27,574 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:27,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:27,574 INFO L82 PathProgramCache]: Analyzing trace with hash 625969832, now seen corresponding path program 1 times [2020-08-18 22:03:27,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:27,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601635425] [2020-08-18 22:03:27,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:27,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:03:27,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601635425] [2020-08-18 22:03:27,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:27,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 22:03:27,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119527618] [2020-08-18 22:03:27,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:03:27,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:27,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:03:27,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:03:27,744 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-08-18 22:03:31,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:31,942 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-08-18 22:03:31,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 22:03:31,943 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-18 22:03:31,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:31,945 INFO L225 Difference]: With dead ends: 40 [2020-08-18 22:03:31,945 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 22:03:31,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:03:31,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 22:03:31,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2020-08-18 22:03:31,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 22:03:31,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-08-18 22:03:31,967 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2020-08-18 22:03:31,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:31,972 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-08-18 22:03:31,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:03:31,973 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-08-18 22:03:31,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 22:03:31,974 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:31,974 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:31,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:03:31,975 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:31,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:31,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1878874992, now seen corresponding path program 2 times [2020-08-18 22:03:31,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:31,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434837611] [2020-08-18 22:03:31,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:32,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:03:32,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434837611] [2020-08-18 22:03:32,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:32,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 22:03:32,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924202850] [2020-08-18 22:03:32,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 22:03:32,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:32,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 22:03:32,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:03:32,241 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 7 states. [2020-08-18 22:03:38,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:38,490 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-08-18 22:03:38,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 22:03:38,491 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-18 22:03:38,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:38,492 INFO L225 Difference]: With dead ends: 46 [2020-08-18 22:03:38,493 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 22:03:38,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:03:38,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 22:03:38,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2020-08-18 22:03:38,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 22:03:38,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-08-18 22:03:38,508 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 25 [2020-08-18 22:03:38,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:38,509 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-08-18 22:03:38,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 22:03:38,509 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-08-18 22:03:38,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 22:03:38,512 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:38,513 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:38,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:03:38,513 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:38,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:38,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1460832712, now seen corresponding path program 3 times [2020-08-18 22:03:38,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:38,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974419766] [2020-08-18 22:03:38,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:38,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:03:38,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974419766] [2020-08-18 22:03:38,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:38,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 22:03:38,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193046359] [2020-08-18 22:03:38,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 22:03:38,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:38,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 22:03:38,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:03:38,749 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 8 states. [2020-08-18 22:03:47,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:47,045 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-08-18 22:03:47,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 22:03:47,046 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-18 22:03:47,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:47,047 INFO L225 Difference]: With dead ends: 52 [2020-08-18 22:03:47,047 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 22:03:47,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-18 22:03:47,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 22:03:47,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-08-18 22:03:47,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-18 22:03:47,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-08-18 22:03:47,058 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 31 [2020-08-18 22:03:47,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:47,059 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-08-18 22:03:47,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 22:03:47,059 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-08-18 22:03:47,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 22:03:47,062 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:47,062 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:47,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:03:47,062 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:47,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:47,063 INFO L82 PathProgramCache]: Analyzing trace with hash 599808768, now seen corresponding path program 4 times [2020-08-18 22:03:47,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:47,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487281763] [2020-08-18 22:03:47,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:47,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:03:47,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487281763] [2020-08-18 22:03:47,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:47,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 22:03:47,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668708325] [2020-08-18 22:03:47,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 22:03:47,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:47,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 22:03:47,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:03:47,325 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 9 states. [2020-08-18 22:03:57,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:57,702 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-08-18 22:03:57,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 22:03:57,703 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-18 22:03:57,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:57,704 INFO L225 Difference]: With dead ends: 58 [2020-08-18 22:03:57,704 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 22:03:57,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-08-18 22:03:57,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 22:03:57,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-08-18 22:03:57,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-18 22:03:57,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-08-18 22:03:57,722 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 37 [2020-08-18 22:03:57,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:57,723 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-08-18 22:03:57,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 22:03:57,723 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-08-18 22:03:57,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-18 22:03:57,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:57,726 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:57,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 22:03:57,727 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:57,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:57,727 INFO L82 PathProgramCache]: Analyzing trace with hash 431393224, now seen corresponding path program 5 times [2020-08-18 22:03:57,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:57,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796911934] [2020-08-18 22:03:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:57,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:03:57,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796911934] [2020-08-18 22:03:57,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:57,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 22:03:57,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62901364] [2020-08-18 22:03:57,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 22:03:57,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:57,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 22:03:57,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:03:57,999 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 10 states. [2020-08-18 22:04:10,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:04:10,439 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2020-08-18 22:04:10,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 22:04:10,454 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-18 22:04:10,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:04:10,456 INFO L225 Difference]: With dead ends: 64 [2020-08-18 22:04:10,456 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 22:04:10,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-08-18 22:04:10,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 22:04:10,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-08-18 22:04:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-18 22:04:10,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-08-18 22:04:10,465 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 43 [2020-08-18 22:04:10,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:04:10,466 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-08-18 22:04:10,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 22:04:10,466 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-08-18 22:04:10,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 22:04:10,467 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:04:10,467 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:04:10,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 22:04:10,468 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:04:10,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:04:10,468 INFO L82 PathProgramCache]: Analyzing trace with hash -240090480, now seen corresponding path program 6 times [2020-08-18 22:04:10,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:04:10,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504940066] [2020-08-18 22:04:10,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:04:10,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:04:10,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:04:10,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:04:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 12 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:04:10,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504940066] [2020-08-18 22:04:10,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:04:10,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 22:04:10,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988635326] [2020-08-18 22:04:10,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 22:04:10,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:04:10,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 22:04:10,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:04:10,697 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 11 states. [2020-08-18 22:04:25,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:04:25,165 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2020-08-18 22:04:25,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 22:04:25,166 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-18 22:04:25,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:04:25,168 INFO L225 Difference]: With dead ends: 70 [2020-08-18 22:04:25,168 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 22:04:25,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-08-18 22:04:25,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 22:04:25,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-08-18 22:04:25,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-18 22:04:25,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-08-18 22:04:25,183 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 49 [2020-08-18 22:04:25,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:04:25,186 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-08-18 22:04:25,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 22:04:25,186 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-08-18 22:04:25,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 22:04:25,190 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:04:25,190 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:04:25,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 22:04:25,191 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:04:25,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:04:25,193 INFO L82 PathProgramCache]: Analyzing trace with hash -2010200744, now seen corresponding path program 7 times [2020-08-18 22:04:25,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:04:25,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981624073] [2020-08-18 22:04:25,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:04:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:04:25,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:04:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:04:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:04:25,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981624073] [2020-08-18 22:04:25,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:04:25,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 22:04:25,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652188002] [2020-08-18 22:04:25,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 22:04:25,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:04:25,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 22:04:25,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-08-18 22:04:25,484 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 12 states.