/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 SequenceOfStatements --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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/nested_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:44:30,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:44:30,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:44:30,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:44:30,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:44:30,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:44:30,679 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:44:30,682 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:44:30,684 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:44:30,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:44:30,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:44:30,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:44:30,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:44:30,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:44:30,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:44:30,694 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:44:30,695 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:44:30,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:44:30,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:44:30,705 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:44:30,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:44:30,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:44:30,709 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:44:30,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:44:30,712 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:44:30,712 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:44:30,712 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:44:30,716 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:44:30,717 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:44:30,717 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:44:30,718 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:44:30,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:44:30,722 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:44:30,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:44:30,723 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:44:30,723 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:44:30,724 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:44:30,724 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:44:30,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:44:30,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:44:30,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:44:30,728 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 [2020-10-13 10:44:30,749 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:44:30,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:44:30,750 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:44:30,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:44:30,751 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:44:30,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:44:30,751 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:44:30,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:44:30,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:44:30,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:44:30,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:44:30,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:44:30,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:44:30,753 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:44:30,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:44:30,753 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:44:30,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:44:30,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:44:30,753 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:44:30,754 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:44:30,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:44:30,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:44:30,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:44:30,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:44:30,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:44:30,755 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:44:30,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:44:30,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:44:30,755 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:44:30,755 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 -> SequenceOfStatements 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;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:44:31,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:44:31,046 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:44:31,050 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:44:31,051 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:44:31,052 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:44:31,053 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2020-10-13 10:44:31,128 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72f363d8f/14caeb1c0f7b4e34af72e97f0ad0ba1b/FLAG83a9068c0 [2020-10-13 10:44:31,541 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:44:31,542 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2020-10-13 10:44:31,548 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72f363d8f/14caeb1c0f7b4e34af72e97f0ad0ba1b/FLAG83a9068c0 [2020-10-13 10:44:31,927 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72f363d8f/14caeb1c0f7b4e34af72e97f0ad0ba1b [2020-10-13 10:44:31,934 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:44:31,936 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:44:31,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:44:31,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:44:31,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:44:31,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:44:31" (1/1) ... [2020-10-13 10:44:31,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ba03fd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:44:31, skipping insertion in model container [2020-10-13 10:44:31,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:44:31" (1/1) ... [2020-10-13 10:44:31,952 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:44:31,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:44:32,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:44:32,118 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:44:32,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:44:32,147 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:44:32,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:44:32 WrapperNode [2020-10-13 10:44:32,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:44:32,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:44:32,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:44:32,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:44:32,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:44:32" (1/1) ... [2020-10-13 10:44:32,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:44:32" (1/1) ... [2020-10-13 10:44:32,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:44:32" (1/1) ... [2020-10-13 10:44:32,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:44:32" (1/1) ... [2020-10-13 10:44:32,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:44:32" (1/1) ... [2020-10-13 10:44:32,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:44:32" (1/1) ... [2020-10-13 10:44:32,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:44:32" (1/1) ... [2020-10-13 10:44:32,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:44:32,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:44:32,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:44:32,263 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:44:32,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:44:32" (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 [2020-10-13 10:44:32,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:44:32,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:44:32,327 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:44:32,327 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:44:32,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:44:32,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:44:32,327 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:44:32,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:44:32,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:44:32,496 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:44:32,496 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 10:44:32,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:44:32 BoogieIcfgContainer [2020-10-13 10:44:32,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:44:32,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:44:32,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:44:32,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:44:32,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:44:31" (1/3) ... [2020-10-13 10:44:32,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a987c47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:44:32, skipping insertion in model container [2020-10-13 10:44:32,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:44:32" (2/3) ... [2020-10-13 10:44:32,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a987c47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:44:32, skipping insertion in model container [2020-10-13 10:44:32,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:44:32" (3/3) ... [2020-10-13 10:44:32,512 INFO L109 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2020-10-13 10:44:32,522 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:44:32,529 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:44:32,540 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:44:32,566 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:44:32,566 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:44:32,566 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:44:32,568 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:44:32,568 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:44:32,568 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:44:32,569 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:44:32,569 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:44:32,590 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-13 10:44:32,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:44:32,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:32,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:32,597 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:32,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:32,602 INFO L82 PathProgramCache]: Analyzing trace with hash -873786703, now seen corresponding path program 1 times [2020-10-13 10:44:32,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:32,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189708582] [2020-10-13 10:44:32,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:32,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:32,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:32,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:32,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:44:32,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:32,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-13 10:44:32,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:32,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:44:32,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:44:32,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:44:32,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:44:32,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:32,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:32,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:32,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:32,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:32,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 10:44:32,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:32,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:32,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:32,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:32,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:32,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:32,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189708582] [2020-10-13 10:44:32,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:44:32,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:44:32,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890979001] [2020-10-13 10:44:32,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:44:32,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:33,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:44:33,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:44:33,013 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-10-13 10:44:33,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:33,046 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2020-10-13 10:44:33,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:44:33,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-13 10:44:33,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:33,057 INFO L225 Difference]: With dead ends: 36 [2020-10-13 10:44:33,057 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 10:44:33,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:44:33,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 10:44:33,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-10-13 10:44:33,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-13 10:44:33,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-13 10:44:33,098 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-10-13 10:44:33,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:33,098 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-13 10:44:33,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:44:33,098 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-13 10:44:33,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 10:44:33,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:33,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:33,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:44:33,100 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:33,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:33,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1621360120, now seen corresponding path program 1 times [2020-10-13 10:44:33,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:33,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349023919] [2020-10-13 10:44:33,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:33,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:33,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:33,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:33,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:33,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:33,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 10:44:33,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:44:33,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 490 [2020-10-13 10:44:33,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:33,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:44:33,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:33,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:44:33,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:44:33,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:33,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:33,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:33,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:33,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:33,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:33,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:33,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:33,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:33,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:33,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:44:33,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:33,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349023919] [2020-10-13 10:44:33,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:44:33,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:44:33,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015986858] [2020-10-13 10:44:33,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:44:33,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:33,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:44:33,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:44:33,678 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2020-10-13 10:44:33,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:33,700 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-10-13 10:44:33,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:44:33,701 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-13 10:44:33,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:33,703 INFO L225 Difference]: With dead ends: 23 [2020-10-13 10:44:33,703 INFO L226 Difference]: Without dead ends: 15 [2020-10-13 10:44:33,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:44:33,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-13 10:44:33,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-13 10:44:33,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 10:44:33,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-13 10:44:33,711 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2020-10-13 10:44:33,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:33,711 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-13 10:44:33,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:44:33,712 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-13 10:44:33,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:44:33,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:33,714 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:33,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:44:33,715 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:33,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:33,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1574756514, now seen corresponding path program 1 times [2020-10-13 10:44:33,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:33,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055681893] [2020-10-13 10:44:33,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:33,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:33,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:33,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:34,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:34,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:34,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:44:34,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:44:34,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 413 [2020-10-13 10:44:34,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:34,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:44:34,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:34,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:44:34,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:34,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:34,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:34,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:34,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:34,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:34,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:44:34,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:34,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:34,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:34,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:34,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:34,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055681893] [2020-10-13 10:44:34,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:34,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:44:34,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036086124] [2020-10-13 10:44:34,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:44:34,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:34,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:44:34,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:44:34,217 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-13 10:44:34,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:34,234 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-10-13 10:44:34,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:44:34,235 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-13 10:44:34,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:34,236 INFO L225 Difference]: With dead ends: 25 [2020-10-13 10:44:34,236 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 10:44:34,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:44:34,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 10:44:34,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-13 10:44:34,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-13 10:44:34,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-13 10:44:34,241 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2020-10-13 10:44:34,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:34,242 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-13 10:44:34,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:44:34,242 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-13 10:44:34,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 10:44:34,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:34,243 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:34,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:44:34,244 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:34,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:34,244 INFO L82 PathProgramCache]: Analyzing trace with hash 130044728, now seen corresponding path program 2 times [2020-10-13 10:44:34,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:34,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002911346] [2020-10-13 10:44:34,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:34,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:34,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:34,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:34,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:34,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:34,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:44:34,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:44:34,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-13 10:44:34,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:34,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:44:34,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:34,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:44:34,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:44:34,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:34,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:34,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:34,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:34,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:34,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:34,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:34,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:34,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:34,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:34,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:44:34,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:34,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002911346] [2020-10-13 10:44:34,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:34,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:44:34,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907026150] [2020-10-13 10:44:34,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:44:34,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:34,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:44:34,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:44:34,639 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-10-13 10:44:34,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:34,665 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-13 10:44:34,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:44:34,666 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-13 10:44:34,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:34,667 INFO L225 Difference]: With dead ends: 27 [2020-10-13 10:44:34,667 INFO L226 Difference]: Without dead ends: 17 [2020-10-13 10:44:34,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:44:34,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-13 10:44:34,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-13 10:44:34,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 10:44:34,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-13 10:44:34,672 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2020-10-13 10:44:34,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:34,673 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-13 10:44:34,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:44:34,673 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-13 10:44:34,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:44:34,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:34,674 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:34,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:44:34,675 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:34,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:34,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1706347678, now seen corresponding path program 3 times [2020-10-13 10:44:34,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:34,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841243056] [2020-10-13 10:44:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:34,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:34,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:34,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:34,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:34,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:34,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:34,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:44:34,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:44:34,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-13 10:44:34,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:34,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:44:34,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:34,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:44:34,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:35,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:35,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:35,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:35,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:35,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:35,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:35,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:35,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:35,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:35,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:35,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:35,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:35,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841243056] [2020-10-13 10:44:35,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:35,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:44:35,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407547971] [2020-10-13 10:44:35,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:44:35,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:35,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:44:35,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:44:35,046 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 6 states. [2020-10-13 10:44:35,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:35,077 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-10-13 10:44:35,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:44:35,077 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-13 10:44:35,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:35,078 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:44:35,078 INFO L226 Difference]: Without dead ends: 18 [2020-10-13 10:44:35,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:44:35,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-13 10:44:35,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-13 10:44:35,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-13 10:44:35,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-13 10:44:35,084 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-10-13 10:44:35,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:35,084 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-13 10:44:35,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:44:35,084 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-13 10:44:35,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 10:44:35,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:35,085 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:35,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:44:35,086 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:35,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:35,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1495029880, now seen corresponding path program 4 times [2020-10-13 10:44:35,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:35,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104988353] [2020-10-13 10:44:35,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:35,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:35,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:35,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:35,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:35,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:35,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:44:35,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:44:35,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 438 [2020-10-13 10:44:35,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:35,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:44:35,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:35,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:44:35,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:35,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:35,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:35,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:35,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:35,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:35,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:44:35,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:35,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:35,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:35,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:35,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:35,613 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:35,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104988353] [2020-10-13 10:44:35,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:35,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:44:35,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287305105] [2020-10-13 10:44:35,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:44:35,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:35,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:44:35,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:44:35,615 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-10-13 10:44:35,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:35,652 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-10-13 10:44:35,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:44:35,652 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-13 10:44:35,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:35,653 INFO L225 Difference]: With dead ends: 31 [2020-10-13 10:44:35,653 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 10:44:35,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:44:35,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 10:44:35,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-13 10:44:35,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-13 10:44:35,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-13 10:44:35,659 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2020-10-13 10:44:35,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:35,659 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-13 10:44:35,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:44:35,659 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-13 10:44:35,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:44:35,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:35,660 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:35,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:44:35,661 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:35,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:35,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1953486370, now seen corresponding path program 5 times [2020-10-13 10:44:35,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:35,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416019644] [2020-10-13 10:44:35,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:35,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:35,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:35,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:35,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:36,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:36,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:44:36,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:44:36,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 490 [2020-10-13 10:44:36,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:36,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:44:36,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:36,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:44:36,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:36,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:36,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:36,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:36,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:36,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:36,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:36,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:36,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:36,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:36,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:36,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:36,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416019644] [2020-10-13 10:44:36,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:36,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:44:36,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497842936] [2020-10-13 10:44:36,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:44:36,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:36,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:44:36,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:44:36,256 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 8 states. [2020-10-13 10:44:36,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:36,300 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-10-13 10:44:36,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:44:36,301 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-13 10:44:36,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:36,302 INFO L225 Difference]: With dead ends: 33 [2020-10-13 10:44:36,302 INFO L226 Difference]: Without dead ends: 20 [2020-10-13 10:44:36,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:44:36,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-13 10:44:36,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-13 10:44:36,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 10:44:36,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-13 10:44:36,307 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-10-13 10:44:36,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:36,308 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-13 10:44:36,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:44:36,308 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-13 10:44:36,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:44:36,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:36,309 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:36,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:44:36,309 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:36,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:36,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1014231624, now seen corresponding path program 6 times [2020-10-13 10:44:36,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:36,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975179173] [2020-10-13 10:44:36,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:36,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:36,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:36,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:36,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:36,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:36,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:44:36,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:44:36,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 579 [2020-10-13 10:44:36,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:36,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:44:36,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:36,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:44:36,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:37,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:37,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:37,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:37,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:37,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:37,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:37,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:37,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:37,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:37,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:37,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:37,007 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:37,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975179173] [2020-10-13 10:44:37,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:37,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:44:37,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154242465] [2020-10-13 10:44:37,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:44:37,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:37,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:44:37,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:44:37,010 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2020-10-13 10:44:37,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:37,070 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-10-13 10:44:37,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:44:37,071 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-13 10:44:37,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:37,072 INFO L225 Difference]: With dead ends: 35 [2020-10-13 10:44:37,072 INFO L226 Difference]: Without dead ends: 21 [2020-10-13 10:44:37,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:44:37,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-13 10:44:37,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-13 10:44:37,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 10:44:37,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-13 10:44:37,077 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-10-13 10:44:37,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:37,077 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-13 10:44:37,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:44:37,078 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-13 10:44:37,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:44:37,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:37,079 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:37,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:44:37,079 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:37,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:37,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1475791074, now seen corresponding path program 7 times [2020-10-13 10:44:37,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:37,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898784049] [2020-10-13 10:44:37,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:37,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:37,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:37,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:37,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:37,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:37,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:44:37,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:44:37,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 662 [2020-10-13 10:44:37,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:37,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:44:37,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:37,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:44:37,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:37,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:37,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:37,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:37,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:37,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:37,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:37,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:37,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:37,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:37,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:37,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:37,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898784049] [2020-10-13 10:44:37,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:37,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:44:37,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920304637] [2020-10-13 10:44:37,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:44:37,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:37,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:44:37,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:44:37,901 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2020-10-13 10:44:37,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:37,990 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-10-13 10:44:37,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:44:37,991 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-13 10:44:37,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:37,992 INFO L225 Difference]: With dead ends: 37 [2020-10-13 10:44:37,992 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 10:44:37,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:44:37,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 10:44:37,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-13 10:44:37,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 10:44:37,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-13 10:44:37,999 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2020-10-13 10:44:37,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:38,000 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-13 10:44:38,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:44:38,000 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-13 10:44:38,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:44:38,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:38,001 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:38,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:44:38,002 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:38,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:38,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1357083384, now seen corresponding path program 8 times [2020-10-13 10:44:38,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:38,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604236581] [2020-10-13 10:44:38,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:38,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:38,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:38,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:38,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:38,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:38,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:44:38,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:44:38,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 682 [2020-10-13 10:44:38,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:38,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:44:38,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:38,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:44:38,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:38,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:38,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:38,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:38,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:38,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:38,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:44:38,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:38,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:38,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:38,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:38,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:38,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604236581] [2020-10-13 10:44:38,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:38,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:44:38,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262468478] [2020-10-13 10:44:38,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:44:38,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:38,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:44:38,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:44:38,848 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2020-10-13 10:44:38,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:38,924 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-10-13 10:44:38,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:44:38,925 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-10-13 10:44:38,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:38,926 INFO L225 Difference]: With dead ends: 39 [2020-10-13 10:44:38,926 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 10:44:38,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:44:38,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 10:44:38,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-13 10:44:38,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 10:44:38,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-13 10:44:38,931 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2020-10-13 10:44:38,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:38,931 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-13 10:44:38,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:44:38,931 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-13 10:44:38,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 10:44:38,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:38,932 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:38,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:44:38,932 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:38,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:38,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1972112290, now seen corresponding path program 9 times [2020-10-13 10:44:38,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:38,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901057710] [2020-10-13 10:44:38,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:38,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:38,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:39,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:39,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:39,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:39,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:44:39,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:44:39,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 718 [2020-10-13 10:44:39,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:39,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:44:39,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:39,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:44:39,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:39,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:39,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:39,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:39,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:39,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:39,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:44:39,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:39,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:39,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:39,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:39,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:44:39,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901057710] [2020-10-13 10:44:39,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:39,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:44:39,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853818560] [2020-10-13 10:44:39,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:44:39,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:39,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:44:39,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:44:39,822 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2020-10-13 10:44:39,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:39,923 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-10-13 10:44:39,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:44:39,924 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-10-13 10:44:39,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:39,925 INFO L225 Difference]: With dead ends: 41 [2020-10-13 10:44:39,925 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 10:44:39,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:44:39,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 10:44:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-13 10:44:39,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 10:44:39,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-13 10:44:39,929 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2020-10-13 10:44:39,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:39,930 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-13 10:44:39,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:44:39,930 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-13 10:44:39,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 10:44:39,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:39,931 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:39,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:44:39,931 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:39,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:39,932 INFO L82 PathProgramCache]: Analyzing trace with hash -436828104, now seen corresponding path program 10 times [2020-10-13 10:44:39,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:39,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159076260] [2020-10-13 10:44:39,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:39,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:39,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:40,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:40,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:40,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 10:44:40,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:44:40,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-13 10:44:40,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:40,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:44:40,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:44:40,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:44:40,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:40,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:40,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:40,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:40,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:40,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:40,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:40,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:40,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:40,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:40,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:40,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:44:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-13 10:44:40,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159076260] [2020-10-13 10:44:40,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:40,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:44:40,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439859909] [2020-10-13 10:44:40,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:44:40,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:40,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:44:40,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:44:40,184 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 4 states. [2020-10-13 10:44:40,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:40,208 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-10-13 10:44:40,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:44:40,209 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-13 10:44:40,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:40,210 INFO L225 Difference]: With dead ends: 54 [2020-10-13 10:44:40,210 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 10:44:40,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:44:40,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 10:44:40,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2020-10-13 10:44:40,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 10:44:40,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-13 10:44:40,217 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 23 [2020-10-13 10:44:40,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:40,218 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-13 10:44:40,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:44:40,218 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-13 10:44:40,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:44:40,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:40,219 INFO L422 BasicCegarLoop]: trace histogram [20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:40,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:44:40,220 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:40,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:40,220 INFO L82 PathProgramCache]: Analyzing trace with hash 786859537, now seen corresponding path program 11 times [2020-10-13 10:44:40,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:40,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962777409] [2020-10-13 10:44:40,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:40,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:40,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:40,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:40,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:44:40,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:40,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-13 10:44:40,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:40,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:44:40,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 10:44:40,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:44:40,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:44:40,888 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 21 [2020-10-13 10:44:41,130 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 13 [2020-10-13 10:44:41,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:41,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:41,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:41,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:44:41,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:41,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:41,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:41,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:41,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:41,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:41,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-10-13 10:44:41,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962777409] [2020-10-13 10:44:41,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:44:41,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 10:44:41,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078044621] [2020-10-13 10:44:41,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:44:41,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:41,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:44:41,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:44:41,164 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 7 states. [2020-10-13 10:44:43,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:43,281 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-13 10:44:43,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:44:43,281 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-10-13 10:44:43,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:43,281 INFO L225 Difference]: With dead ends: 37 [2020-10-13 10:44:43,282 INFO L226 Difference]: Without dead ends: 0 [2020-10-13 10:44:43,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:44:43,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-13 10:44:43,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-13 10:44:43,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-13 10:44:43,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-13 10:44:43,283 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2020-10-13 10:44:43,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:43,284 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-13 10:44:43,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:44:43,284 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-13 10:44:43,284 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-13 10:44:43,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:44:43,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-13 10:44:43,403 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-13 10:44:43,403 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-13 10:44:43,404 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-13 10:44:43,404 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-13 10:44:43,404 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-13 10:44:43,404 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-13 10:44:43,404 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 25) no Hoare annotation was computed. [2020-10-13 10:44:43,404 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 19) the Hoare annotation is: (<= main_~x~0 (+ (* 4294967296 (div main_~x~0 4294967296)) 268435454)) [2020-10-13 10:44:43,404 INFO L268 CegarLoopResult]: For program point L17-3(lines 17 19) no Hoare annotation was computed. [2020-10-13 10:44:43,405 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 25) no Hoare annotation was computed. [2020-10-13 10:44:43,405 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 25) the Hoare annotation is: true [2020-10-13 10:44:43,405 INFO L264 CegarLoopResult]: At program point L14-2(lines 14 22) the Hoare annotation is: (let ((.cse0 (div main_~x~0 2))) (let ((.cse1 (div (+ (* .cse0 (- 2)) main_~x~0) 4294967296))) (or (not (= main_~x~0 (+ (* .cse0 2) (* .cse1 4294967296)))) (<= main_~x~0 (+ .cse0 (* 2147483648 .cse1) (* 2147483648 (div main_~x~0 4294967296)) 134217727))))) [2020-10-13 10:44:43,405 INFO L264 CegarLoopResult]: At program point L14-3(lines 14 22) the Hoare annotation is: (not (= main_~x~0 (let ((.cse0 (div main_~x~0 2))) (+ (* 2 .cse0) (* 4294967296 (div (+ (* .cse0 (- 2)) main_~x~0) 4294967296)))))) [2020-10-13 10:44:43,405 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-10-13 10:44:43,406 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-10-13 10:44:43,406 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-10-13 10:44:43,406 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-10-13 10:44:43,406 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-10-13 10:44:43,406 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-10-13 10:44:43,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:44:43 BoogieIcfgContainer [2020-10-13 10:44:43,425 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 10:44:43,427 INFO L168 Benchmark]: Toolchain (without parser) took 11491.08 ms. Allocated memory was 148.9 MB in the beginning and 332.9 MB in the end (delta: 184.0 MB). Free memory was 104.4 MB in the beginning and 299.6 MB in the end (delta: -195.2 MB). Peak memory consumption was 185.6 MB. Max. memory is 7.1 GB. [2020-10-13 10:44:43,427 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 148.9 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-13 10:44:43,428 INFO L168 Benchmark]: CACSL2BoogieTranslator took 211.69 ms. Allocated memory is still 148.9 MB. Free memory was 104.2 MB in the beginning and 94.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-10-13 10:44:43,429 INFO L168 Benchmark]: Boogie Preprocessor took 114.00 ms. Allocated memory was 148.9 MB in the beginning and 205.5 MB in the end (delta: 56.6 MB). Free memory was 94.9 MB in the beginning and 185.5 MB in the end (delta: -90.7 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-10-13 10:44:43,429 INFO L168 Benchmark]: RCFGBuilder took 236.70 ms. Allocated memory is still 205.5 MB. Free memory was 185.5 MB in the beginning and 173.1 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-10-13 10:44:43,430 INFO L168 Benchmark]: TraceAbstraction took 10923.74 ms. Allocated memory was 205.5 MB in the beginning and 332.9 MB in the end (delta: 127.4 MB). Free memory was 172.5 MB in the beginning and 299.6 MB in the end (delta: -127.1 MB). Peak memory consumption was 197.2 MB. Max. memory is 7.1 GB. [2020-10-13 10:44:43,433 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 148.9 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 211.69 ms. Allocated memory is still 148.9 MB. Free memory was 104.2 MB in the beginning and 94.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.00 ms. Allocated memory was 148.9 MB in the beginning and 205.5 MB in the end (delta: 56.6 MB). Free memory was 94.9 MB in the beginning and 185.5 MB in the end (delta: -90.7 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 236.70 ms. Allocated memory is still 205.5 MB. Free memory was 185.5 MB in the beginning and 173.1 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10923.74 ms. Allocated memory was 205.5 MB in the beginning and 332.9 MB in the end (delta: 127.4 MB). Free memory was 172.5 MB in the beginning and 299.6 MB in the end (delta: -127.1 MB). Peak memory consumption was 197.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: !(x == x / 2 * 2 + (x / 2 * -2 + x) / 4294967296 * 4294967296) || x <= x / 2 + 2147483648 * ((x / 2 * -2 + x) / 4294967296) + 2147483648 * (x / 4294967296) + 134217727 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: x <= 4294967296 * (x / 4294967296) + 268435454 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.7s, OverallIterations: 13, TraceHistogramMax: 20, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 168 SDtfs, 15 SDslu, 553 SDs, 0 SdLazy, 455 SolverSat, 69 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 14 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 20 PreInvPairs, 46 NumberOfFragments, 78 HoareAnnotationTreeSize, 20 FomulaSimplifications, 822 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 22 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 7.5s InterpolantComputationTime, 244 NumberOfCodeBlocks, 244 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 231 ConstructedInterpolants, 0 QuantifiedInterpolants, 18877 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 300/466 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...