/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:20:28,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:20:28,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:20:28,494 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:20:28,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:20:28,504 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:20:28,506 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:20:28,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:20:28,513 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:20:28,516 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:20:28,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:20:28,518 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:20:28,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:20:28,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:20:28,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:20:28,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:20:28,527 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:20:28,528 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:20:28,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:20:28,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:20:28,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:20:28,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:20:28,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:20:28,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:20:28,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:20:28,538 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:20:28,538 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:20:28,539 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:20:28,539 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:20:28,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 17:20:28,541 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 17:20:28,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 17:20:28,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 17:20:28,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 17:20:28,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 17:20:28,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 17:20:28,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 17:20:28,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 17:20:28,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:20:28,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:20:28,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:20:28,548 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 [2020-09-24 17:20:28,571 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:20:28,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:20:28,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:20:28,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:20:28,574 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:20:28,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:20:28,574 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:20:28,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:20:28,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:20:28,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:20:28,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:20:28,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:20:28,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:20:28,576 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:20:28,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:20:28,576 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:20:28,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:20:28,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:20:28,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:20:28,577 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:20:28,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:20:28,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:20:28,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:20:28,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:20:28,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:20:28,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:20:28,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:20:28,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:20:28,579 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:20:28,579 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.rcfgbuilder: Size of a code block -> SingleStatement 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 -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; [2020-09-24 17:20:29,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:20:29,072 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:20:29,076 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:20:29,078 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:20:29,080 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:20:29,081 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-09-24 17:20:29,173 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b24821884/83b458a2821549d384a918019ff3480a/FLAG6660d57c3 [2020-09-24 17:20:29,740 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:20:29,741 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01-1.i [2020-09-24 17:20:29,750 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b24821884/83b458a2821549d384a918019ff3480a/FLAG6660d57c3 [2020-09-24 17:20:30,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b24821884/83b458a2821549d384a918019ff3480a [2020-09-24 17:20:30,094 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:20:30,102 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:20:30,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:20:30,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:20:30,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:20:30,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:20:30" (1/1) ... [2020-09-24 17:20:30,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@156ed3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:30, skipping insertion in model container [2020-09-24 17:20:30,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:20:30" (1/1) ... [2020-09-24 17:20:30,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:20:30,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:20:30,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:20:30,376 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:20:30,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:20:30,414 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:20:30,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:30 WrapperNode [2020-09-24 17:20:30,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:20:30,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:20:30,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:20:30,417 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:20:30,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:30" (1/1) ... [2020-09-24 17:20:30,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:30" (1/1) ... [2020-09-24 17:20:30,443 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:30" (1/1) ... [2020-09-24 17:20:30,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:30" (1/1) ... [2020-09-24 17:20:30,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:30" (1/1) ... [2020-09-24 17:20:30,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:30" (1/1) ... [2020-09-24 17:20:30,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:30" (1/1) ... [2020-09-24 17:20:30,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:20:30,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:20:30,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:20:30,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:20:30,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:30" (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 [2020-09-24 17:20:30,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:20:30,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:20:30,628 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 17:20:30,628 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:20:30,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:20:30,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 17:20:30,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 17:20:30,629 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:20:30,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:20:30,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:20:30,830 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:20:30,830 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 17:20:30,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:20:30 BoogieIcfgContainer [2020-09-24 17:20:30,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:20:30,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:20:30,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:20:30,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:20:30,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:20:30" (1/3) ... [2020-09-24 17:20:30,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f1cfc55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:20:30, skipping insertion in model container [2020-09-24 17:20:30,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:30" (2/3) ... [2020-09-24 17:20:30,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f1cfc55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:20:30, skipping insertion in model container [2020-09-24 17:20:30,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:20:30" (3/3) ... [2020-09-24 17:20:30,847 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-09-24 17:20:30,868 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:20:30,882 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:20:30,909 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:20:30,950 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:20:30,950 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:20:30,950 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:20:30,950 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:20:30,952 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:20:30,952 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:20:30,952 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:20:30,953 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:20:30,991 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-09-24 17:20:31,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-24 17:20:31,001 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:31,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:31,002 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:31,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:31,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1882057920, now seen corresponding path program 1 times [2020-09-24 17:20:31,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:31,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124013442] [2020-09-24 17:20:31,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:31,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:31,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:31,323 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:31,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 17:20:31,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:20:31,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-09-24 17:20:31,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:31,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:31,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 17:20:31,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:31,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:20:31,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:31,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:31,375 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:31,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:31,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:31,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:20:31,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:31,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:31,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:31,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:31,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:31,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124013442] [2020-09-24 17:20:31,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:20:31,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 17:20:31,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147211756] [2020-09-24 17:20:31,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 17:20:31,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:31,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 17:20:31,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 17:20:31,428 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-09-24 17:20:31,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:31,456 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-09-24 17:20:31,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 17:20:31,457 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-09-24 17:20:31,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:31,468 INFO L225 Difference]: With dead ends: 37 [2020-09-24 17:20:31,469 INFO L226 Difference]: Without dead ends: 20 [2020-09-24 17:20:31,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 17:20:31,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-24 17:20:31,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-24 17:20:31,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-24 17:20:31,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-09-24 17:20:31,527 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2020-09-24 17:20:31,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:31,527 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-09-24 17:20:31,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 17:20:31,528 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-09-24 17:20:31,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-24 17:20:31,528 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:31,529 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:31,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:20:31,529 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:31,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:31,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1869128626, now seen corresponding path program 1 times [2020-09-24 17:20:31,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:31,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271611459] [2020-09-24 17:20:31,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:31,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:31,666 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:31,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 17:20:31,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:31,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-09-24 17:20:31,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:31,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:20:31,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 17:20:31,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:20:31,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:31,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:31,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:31,745 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:31,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:31,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:31,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:20:31,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:31,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:31,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:31,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:31,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:31,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271611459] [2020-09-24 17:20:31,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:20:31,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 17:20:31,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877585669] [2020-09-24 17:20:31,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:20:31,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:31,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:20:31,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:20:31,755 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2020-09-24 17:20:31,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:31,802 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-09-24 17:20:31,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:20:31,803 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-24 17:20:31,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:31,805 INFO L225 Difference]: With dead ends: 31 [2020-09-24 17:20:31,805 INFO L226 Difference]: Without dead ends: 26 [2020-09-24 17:20:31,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:20:31,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-24 17:20:31,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-09-24 17:20:31,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-24 17:20:31,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-09-24 17:20:31,814 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2020-09-24 17:20:31,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:31,815 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-09-24 17:20:31,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:20:31,815 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-09-24 17:20:31,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-24 17:20:31,816 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:31,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:31,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:20:31,817 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:31,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:31,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1535432394, now seen corresponding path program 1 times [2020-09-24 17:20:31,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:31,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297207477] [2020-09-24 17:20:31,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:31,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:32,116 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:32,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-24 17:20:32,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:32,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-09-24 17:20:32,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:32,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 17:20:32,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 17:20:32,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 17:20:32,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:32,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:32,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:32,515 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:32,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:32,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:32,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:20:32,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:32,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:32,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:32,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:32,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:32,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:32,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297207477] [2020-09-24 17:20:32,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:32,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 17:20:32,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098547147] [2020-09-24 17:20:32,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 17:20:32,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:32,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 17:20:32,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-24 17:20:32,525 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 11 states. [2020-09-24 17:20:32,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:32,731 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-09-24 17:20:32,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 17:20:32,732 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-09-24 17:20:32,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:32,733 INFO L225 Difference]: With dead ends: 48 [2020-09-24 17:20:32,733 INFO L226 Difference]: Without dead ends: 29 [2020-09-24 17:20:32,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-24 17:20:32,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-24 17:20:32,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-09-24 17:20:32,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-24 17:20:32,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-24 17:20:32,741 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2020-09-24 17:20:32,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:32,742 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-24 17:20:32,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 17:20:32,742 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-24 17:20:32,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-24 17:20:32,743 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:32,743 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:32,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:20:32,743 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:32,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:32,744 INFO L82 PathProgramCache]: Analyzing trace with hash -927596731, now seen corresponding path program 1 times [2020-09-24 17:20:32,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:32,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763579456] [2020-09-24 17:20:32,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:32,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:32,831 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:32,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-24 17:20:32,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:32,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-09-24 17:20:32,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:32,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:20:32,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 17:20:32,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 17:20:32,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:32,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:32,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:32,870 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:32,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:32,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:32,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:20:32,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:32,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:32,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:32,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:32,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:32,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763579456] [2020-09-24 17:20:32,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:32,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 17:20:32,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354137057] [2020-09-24 17:20:32,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:20:32,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:32,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:20:32,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:20:32,878 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2020-09-24 17:20:32,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:32,932 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-09-24 17:20:32,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:20:32,933 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-09-24 17:20:32,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:32,934 INFO L225 Difference]: With dead ends: 42 [2020-09-24 17:20:32,935 INFO L226 Difference]: Without dead ends: 31 [2020-09-24 17:20:32,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:20:32,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-24 17:20:32,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-09-24 17:20:32,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 17:20:32,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-09-24 17:20:32,942 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-09-24 17:20:32,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:32,942 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-09-24 17:20:32,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:20:32,942 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-09-24 17:20:32,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 17:20:32,943 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:32,944 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:32,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 17:20:32,944 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:32,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:32,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1778100254, now seen corresponding path program 2 times [2020-09-24 17:20:32,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:32,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626120302] [2020-09-24 17:20:32,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:32,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:33,143 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:33,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 17:20:33,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:33,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-09-24 17:20:33,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:33,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 17:20:33,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 17:20:33,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 17:20:33,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:33,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:33,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:33,432 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:33,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:33,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:33,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:20:33,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:33,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:33,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:33,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626120302] [2020-09-24 17:20:33,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:33,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 17:20:33,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659815247] [2020-09-24 17:20:33,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 17:20:33,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:33,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 17:20:33,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-09-24 17:20:33,442 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-09-24 17:20:33,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:33,882 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-09-24 17:20:33,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 17:20:33,883 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-09-24 17:20:33,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:33,884 INFO L225 Difference]: With dead ends: 42 [2020-09-24 17:20:33,884 INFO L226 Difference]: Without dead ends: 37 [2020-09-24 17:20:33,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-24 17:20:33,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-24 17:20:33,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-09-24 17:20:33,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-24 17:20:33,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-24 17:20:33,892 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 26 [2020-09-24 17:20:33,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:33,892 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-24 17:20:33,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 17:20:33,893 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-24 17:20:33,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 17:20:33,894 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:33,894 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:33,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 17:20:33,894 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:33,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:33,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1884066515, now seen corresponding path program 2 times [2020-09-24 17:20:33,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:33,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645501528] [2020-09-24 17:20:33,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:33,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:34,004 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:34,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 17:20:34,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:34,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-09-24 17:20:34,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:34,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:20:34,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 17:20:34,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 17:20:34,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:34,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:34,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:34,049 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:34,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:34,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:34,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:20:34,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:34,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:34,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:34,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:34,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:34,053 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:34,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645501528] [2020-09-24 17:20:34,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:34,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 17:20:34,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970127301] [2020-09-24 17:20:34,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 17:20:34,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:34,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 17:20:34,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:20:34,056 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 7 states. [2020-09-24 17:20:34,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:34,134 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-09-24 17:20:34,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 17:20:34,135 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-09-24 17:20:34,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:34,136 INFO L225 Difference]: With dead ends: 48 [2020-09-24 17:20:34,136 INFO L226 Difference]: Without dead ends: 37 [2020-09-24 17:20:34,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-24 17:20:34,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-24 17:20:34,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-09-24 17:20:34,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-24 17:20:34,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-09-24 17:20:34,143 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2020-09-24 17:20:34,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:34,143 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-09-24 17:20:34,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 17:20:34,143 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-09-24 17:20:34,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-24 17:20:34,144 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:34,145 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:34,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 17:20:34,145 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:34,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:34,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1363892486, now seen corresponding path program 3 times [2020-09-24 17:20:34,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:34,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274822002] [2020-09-24 17:20:34,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:34,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:34,561 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:34,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-24 17:20:34,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:34,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-09-24 17:20:34,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:34,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 17:20:34,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 17:20:34,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 17:20:34,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:34,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:34,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:34,856 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:34,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:34,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:34,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:20:34,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:34,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:34,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:34,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:34,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 17:20:34,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274822002] [2020-09-24 17:20:34,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:34,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 17:20:34,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130553650] [2020-09-24 17:20:34,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 17:20:34,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:34,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 17:20:34,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-24 17:20:34,869 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 13 states. [2020-09-24 17:20:35,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:35,272 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-09-24 17:20:35,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 17:20:35,273 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-09-24 17:20:35,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:35,274 INFO L225 Difference]: With dead ends: 47 [2020-09-24 17:20:35,274 INFO L226 Difference]: Without dead ends: 42 [2020-09-24 17:20:35,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-09-24 17:20:35,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-24 17:20:35,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-09-24 17:20:35,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-24 17:20:35,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-09-24 17:20:35,289 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 32 [2020-09-24 17:20:35,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:35,290 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-09-24 17:20:35,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 17:20:35,290 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-09-24 17:20:35,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 17:20:35,291 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:35,292 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:35,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 17:20:35,293 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:35,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:35,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1557187861, now seen corresponding path program 3 times [2020-09-24 17:20:35,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:35,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970333344] [2020-09-24 17:20:35,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:35,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:35,479 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:35,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 17:20:35,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:35,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-09-24 17:20:35,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:35,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 17:20:35,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 17:20:35,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 17:20:35,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:35,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:35,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:35,554 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:35,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:35,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:35,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:20:35,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:35,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:35,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:35,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:35,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:35,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970333344] [2020-09-24 17:20:35,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:35,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 17:20:35,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647456591] [2020-09-24 17:20:35,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 17:20:35,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:35,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 17:20:35,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-24 17:20:35,560 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2020-09-24 17:20:35,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:35,671 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-09-24 17:20:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 17:20:35,671 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-09-24 17:20:35,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:35,672 INFO L225 Difference]: With dead ends: 60 [2020-09-24 17:20:35,672 INFO L226 Difference]: Without dead ends: 49 [2020-09-24 17:20:35,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-09-24 17:20:35,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-24 17:20:35,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-09-24 17:20:35,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-24 17:20:35,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-09-24 17:20:35,679 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 37 [2020-09-24 17:20:35,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:35,680 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-09-24 17:20:35,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 17:20:35,680 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-09-24 17:20:35,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-24 17:20:35,681 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:35,681 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:35,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 17:20:35,682 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:35,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:35,682 INFO L82 PathProgramCache]: Analyzing trace with hash -2133811459, now seen corresponding path program 4 times [2020-09-24 17:20:35,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:35,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042732029] [2020-09-24 17:20:35,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:35,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:35,894 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:35,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-24 17:20:35,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:35,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-09-24 17:20:35,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:35,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 17:20:35,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 17:20:35,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-24 17:20:35,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:35,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:35,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:35,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:35,995 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:35,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:35,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:35,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:20:35,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:35,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:35,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:35,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:35,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:36,002 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:36,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042732029] [2020-09-24 17:20:36,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:36,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 17:20:36,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807728767] [2020-09-24 17:20:36,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 17:20:36,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:36,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 17:20:36,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-24 17:20:36,010 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 11 states. [2020-09-24 17:20:36,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:36,178 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-09-24 17:20:36,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 17:20:36,179 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-09-24 17:20:36,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:36,180 INFO L225 Difference]: With dead ends: 66 [2020-09-24 17:20:36,180 INFO L226 Difference]: Without dead ends: 55 [2020-09-24 17:20:36,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-09-24 17:20:36,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-24 17:20:36,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-09-24 17:20:36,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-24 17:20:36,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-09-24 17:20:36,195 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 43 [2020-09-24 17:20:36,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:36,195 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-09-24 17:20:36,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 17:20:36,196 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-09-24 17:20:36,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-24 17:20:36,199 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:36,199 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:36,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 17:20:36,199 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:36,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:36,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1351967461, now seen corresponding path program 5 times [2020-09-24 17:20:36,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:36,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471144583] [2020-09-24 17:20:36,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:36,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:36,540 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:36,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-24 17:20:36,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:36,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-09-24 17:20:36,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:36,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 17:20:36,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 17:20:36,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-24 17:20:36,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:36,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:36,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:36,645 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:36,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:36,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:36,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:20:36,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:36,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:36,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:36,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:36,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 21 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:36,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471144583] [2020-09-24 17:20:36,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:36,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 17:20:36,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456878484] [2020-09-24 17:20:36,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 17:20:36,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:36,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 17:20:36,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-24 17:20:36,652 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 13 states. [2020-09-24 17:20:36,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:36,852 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2020-09-24 17:20:36,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 17:20:36,853 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-09-24 17:20:36,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:36,854 INFO L225 Difference]: With dead ends: 72 [2020-09-24 17:20:36,855 INFO L226 Difference]: Without dead ends: 61 [2020-09-24 17:20:36,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2020-09-24 17:20:36,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-24 17:20:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-09-24 17:20:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-24 17:20:36,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-09-24 17:20:36,874 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 49 [2020-09-24 17:20:36,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:36,874 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-09-24 17:20:36,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 17:20:36,875 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-09-24 17:20:36,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 17:20:36,876 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:36,876 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:36,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 17:20:36,876 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:36,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:36,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1927178035, now seen corresponding path program 6 times [2020-09-24 17:20:36,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:36,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347733316] [2020-09-24 17:20:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:36,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:37,254 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:37,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 17:20:37,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:37,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 361 [2020-09-24 17:20:37,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:37,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 17:20:37,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 17:20:37,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-24 17:20:37,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:37,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:37,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:37,404 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:37,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:37,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:37,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:20:37,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:37,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:37,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:37,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:37,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:37,410 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:37,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347733316] [2020-09-24 17:20:37,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:37,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 17:20:37,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153487202] [2020-09-24 17:20:37,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 17:20:37,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:37,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 17:20:37,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-24 17:20:37,413 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 15 states. [2020-09-24 17:20:37,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:37,659 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-09-24 17:20:37,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 17:20:37,660 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-09-24 17:20:37,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:37,661 INFO L225 Difference]: With dead ends: 78 [2020-09-24 17:20:37,661 INFO L226 Difference]: Without dead ends: 67 [2020-09-24 17:20:37,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-09-24 17:20:37,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-24 17:20:37,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-09-24 17:20:37,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-24 17:20:37,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-09-24 17:20:37,678 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 55 [2020-09-24 17:20:37,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:37,678 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-09-24 17:20:37,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 17:20:37,678 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-09-24 17:20:37,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-24 17:20:37,679 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:37,679 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:37,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 17:20:37,683 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:37,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:37,684 INFO L82 PathProgramCache]: Analyzing trace with hash -879247179, now seen corresponding path program 7 times [2020-09-24 17:20:37,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:37,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891210882] [2020-09-24 17:20:37,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:37,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:38,180 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:38,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-24 17:20:38,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:38,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 480 [2020-09-24 17:20:38,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:38,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 17:20:38,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 17:20:38,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-24 17:20:38,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:38,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:38,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:38,403 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:38,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:38,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:38,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:20:38,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:38,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:38,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:38,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:38,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:20:38,412 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 29 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:38,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891210882] [2020-09-24 17:20:38,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:38,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 17:20:38,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008980750] [2020-09-24 17:20:38,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 17:20:38,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:38,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 17:20:38,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-24 17:20:38,416 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 17 states. [2020-09-24 17:20:38,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:38,701 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-09-24 17:20:38,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 17:20:38,702 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2020-09-24 17:20:38,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:38,703 INFO L225 Difference]: With dead ends: 84 [2020-09-24 17:20:38,703 INFO L226 Difference]: Without dead ends: 73 [2020-09-24 17:20:38,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2020-09-24 17:20:38,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-24 17:20:38,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-09-24 17:20:38,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-24 17:20:38,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-09-24 17:20:38,719 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 61 [2020-09-24 17:20:38,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:38,723 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-09-24 17:20:38,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 17:20:38,723 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-09-24 17:20:38,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 17:20:38,724 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:38,724 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:38,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 17:20:38,727 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:38,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:38,727 INFO L82 PathProgramCache]: Analyzing trace with hash -583378275, now seen corresponding path program 8 times [2020-09-24 17:20:38,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:38,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799706077] [2020-09-24 17:20:38,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:38,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:39,311 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:39,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 17:20:39,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:39,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 563 [2020-09-24 17:20:39,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:39,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 17:20:39,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 17:20:39,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-24 17:20:39,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:39,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:39,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:39,586 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:39,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:39,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:39,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:20:39,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:39,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:39,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:39,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:39,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 33 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:39,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799706077] [2020-09-24 17:20:39,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:39,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 17:20:39,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564523549] [2020-09-24 17:20:39,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 17:20:39,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:39,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 17:20:39,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-09-24 17:20:39,601 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 19 states. [2020-09-24 17:20:39,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:39,991 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2020-09-24 17:20:39,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 17:20:39,992 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2020-09-24 17:20:39,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:39,993 INFO L225 Difference]: With dead ends: 89 [2020-09-24 17:20:39,994 INFO L226 Difference]: Without dead ends: 78 [2020-09-24 17:20:39,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 17:20:39,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-24 17:20:40,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-09-24 17:20:40,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-24 17:20:40,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-09-24 17:20:40,002 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 67 [2020-09-24 17:20:40,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:40,003 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-09-24 17:20:40,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 17:20:40,003 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-09-24 17:20:40,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 17:20:40,004 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:40,004 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:40,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 17:20:40,005 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:40,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:40,005 INFO L82 PathProgramCache]: Analyzing trace with hash 929818245, now seen corresponding path program 9 times [2020-09-24 17:20:40,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:40,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519628099] [2020-09-24 17:20:40,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:40,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 17:20:40,025 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 17:20:40,025 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 17:20:40,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 17:20:40,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 05:20:40 BoogieIcfgContainer [2020-09-24 17:20:40,053 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 17:20:40,056 INFO L168 Benchmark]: Toolchain (without parser) took 9957.90 ms. Allocated memory was 139.5 MB in the beginning and 305.7 MB in the end (delta: 166.2 MB). Free memory was 102.8 MB in the beginning and 92.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 176.2 MB. Max. memory is 7.1 GB. [2020-09-24 17:20:40,057 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 17:20:40,058 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.72 ms. Allocated memory is still 139.5 MB. Free memory was 102.1 MB in the beginning and 92.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-24 17:20:40,058 INFO L168 Benchmark]: Boogie Preprocessor took 123.27 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.7 MB in the beginning and 181.9 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-09-24 17:20:40,059 INFO L168 Benchmark]: RCFGBuilder took 296.60 ms. Allocated memory is still 201.9 MB. Free memory was 181.9 MB in the beginning and 169.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-24 17:20:40,060 INFO L168 Benchmark]: TraceAbstraction took 9215.09 ms. Allocated memory was 201.9 MB in the beginning and 305.7 MB in the end (delta: 103.8 MB). Free memory was 168.4 MB in the beginning and 92.8 MB in the end (delta: 75.7 MB). Peak memory consumption was 179.5 MB. Max. memory is 7.1 GB. [2020-09-24 17:20:40,063 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 312.72 ms. Allocated memory is still 139.5 MB. Free memory was 102.1 MB in the beginning and 92.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.27 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.7 MB in the beginning and 181.9 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 296.60 ms. Allocated memory is still 201.9 MB. Free memory was 181.9 MB in the beginning and 169.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9215.09 ms. Allocated memory was 201.9 MB in the beginning and 305.7 MB in the end (delta: 103.8 MB). Free memory was 168.4 MB in the beginning and 92.8 MB in the end (delta: 75.7 MB). Peak memory consumption was 179.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND FALSE !(i<10) [L13] i++ [L13] COND FALSE !(i<=n) [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.0s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 222 SDtfs, 201 SDslu, 1069 SDs, 0 SdLazy, 775 SolverSat, 87 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 266 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 32 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 547 NumberOfCodeBlocks, 547 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 461 ConstructedInterpolants, 0 QuantifiedInterpolants, 60623 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 160/758 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 incorrect! Received shutdown request...