/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/sanfoundry_24-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 08:00:10,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 08:00:10,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 08:00:10,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 08:00:10,527 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 08:00:10,538 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 08:00:10,541 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 08:00:10,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 08:00:10,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 08:00:10,551 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 08:00:10,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 08:00:10,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 08:00:10,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 08:00:10,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 08:00:10,559 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 08:00:10,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 08:00:10,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 08:00:10,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 08:00:10,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 08:00:10,573 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 08:00:10,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 08:00:10,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 08:00:10,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 08:00:10,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 08:00:10,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 08:00:10,583 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 08:00:10,584 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 08:00:10,589 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 08:00:10,589 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 08:00:10,590 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 08:00:10,590 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 08:00:10,591 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 08:00:10,593 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 08:00:10,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 08:00:10,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 08:00:10,595 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 08:00:10,596 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 08:00:10,596 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 08:00:10,596 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 08:00:10,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 08:00:10,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 08:00:10,600 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 08:00:10,649 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 08:00:10,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 08:00:10,652 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 08:00:10,652 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 08:00:10,652 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 08:00:10,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 08:00:10,653 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 08:00:10,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 08:00:10,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 08:00:10,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 08:00:10,655 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 08:00:10,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 08:00:10,655 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 08:00:10,656 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 08:00:10,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 08:00:10,656 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 08:00:10,656 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 08:00:10,656 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 08:00:10,657 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 08:00:10,657 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 08:00:10,657 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 08:00:10,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 08:00:10,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 08:00:10,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 08:00:10,658 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 08:00:10,658 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 08:00:10,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 08:00:10,658 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 08:00:10,659 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 08:00:10,659 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-09-25 08:00:11,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 08:00:11,226 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 08:00:11,231 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 08:00:11,232 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 08:00:11,233 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 08:00:11,234 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_24-1.i [2020-09-25 08:00:11,326 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/19b24e4a3/6ada109cb64d489cbf60c9650ecac6a3/FLAG89bcefad8 [2020-09-25 08:00:11,874 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 08:00:11,875 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sanfoundry_24-1.i [2020-09-25 08:00:11,884 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/19b24e4a3/6ada109cb64d489cbf60c9650ecac6a3/FLAG89bcefad8 [2020-09-25 08:00:12,214 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/19b24e4a3/6ada109cb64d489cbf60c9650ecac6a3 [2020-09-25 08:00:12,227 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 08:00:12,231 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 08:00:12,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 08:00:12,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 08:00:12,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 08:00:12,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:00:12" (1/1) ... [2020-09-25 08:00:12,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d5fe93d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:12, skipping insertion in model container [2020-09-25 08:00:12,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:00:12" (1/1) ... [2020-09-25 08:00:12,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 08:00:12,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 08:00:12,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:00:12,479 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 08:00:12,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:00:12,545 INFO L208 MainTranslator]: Completed translation [2020-09-25 08:00:12,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:12 WrapperNode [2020-09-25 08:00:12,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 08:00:12,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 08:00:12,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 08:00:12,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 08:00:12,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:12" (1/1) ... [2020-09-25 08:00:12,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:12" (1/1) ... [2020-09-25 08:00:12,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:12" (1/1) ... [2020-09-25 08:00:12,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:12" (1/1) ... [2020-09-25 08:00:12,662 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:12" (1/1) ... [2020-09-25 08:00:12,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:12" (1/1) ... [2020-09-25 08:00:12,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:12" (1/1) ... [2020-09-25 08:00:12,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 08:00:12,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 08:00:12,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 08:00:12,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 08:00:12,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 08:00:12,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 08:00:12,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 08:00:12,756 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 08:00:12,756 INFO L138 BoogieDeclarations]: Found implementation of procedure printEven [2020-09-25 08:00:12,756 INFO L138 BoogieDeclarations]: Found implementation of procedure printOdd [2020-09-25 08:00:12,756 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 08:00:12,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 08:00:12,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 08:00:12,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 08:00:12,758 INFO L130 BoogieDeclarations]: Found specification of procedure printEven [2020-09-25 08:00:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure printOdd [2020-09-25 08:00:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 08:00:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 08:00:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 08:00:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 08:00:12,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 08:00:12,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 08:00:12,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 08:00:13,065 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 08:00:13,065 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 08:00:13,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:00:13 BoogieIcfgContainer [2020-09-25 08:00:13,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 08:00:13,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 08:00:13,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 08:00:13,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 08:00:13,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 08:00:12" (1/3) ... [2020-09-25 08:00:13,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e552f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:00:13, skipping insertion in model container [2020-09-25 08:00:13,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:12" (2/3) ... [2020-09-25 08:00:13,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e552f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:00:13, skipping insertion in model container [2020-09-25 08:00:13,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:00:13" (3/3) ... [2020-09-25 08:00:13,081 INFO L109 eAbstractionObserver]: Analyzing ICFG sanfoundry_24-1.i [2020-09-25 08:00:13,093 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 08:00:13,103 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 08:00:13,127 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 08:00:13,155 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 08:00:13,155 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 08:00:13,155 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 08:00:13,155 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 08:00:13,156 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 08:00:13,156 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 08:00:13,156 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 08:00:13,156 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 08:00:13,181 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-09-25 08:00:13,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 08:00:13,190 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:00:13,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:00:13,192 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:00:13,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:00:13,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1447674201, now seen corresponding path program 1 times [2020-09-25 08:00:13,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:00:13,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256249480] [2020-09-25 08:00:13,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:00:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:13,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:13,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:14,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:14,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-25 08:00:14,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:00:14,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 699 [2020-09-25 08:00:14,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:14,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:14,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:14,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 08:00:14,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:14,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 08:00:14,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:00:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:14,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:14,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:14,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:00:14,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:14,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 08:00:14,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:14,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:14,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:14,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:14,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:14,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:14,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:00:14,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256249480] [2020-09-25 08:00:14,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:00:14,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 08:00:14,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111581709] [2020-09-25 08:00:14,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 08:00:14,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:00:14,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 08:00:14,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 08:00:14,181 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 3 states. [2020-09-25 08:00:14,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:00:14,342 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2020-09-25 08:00:14,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 08:00:14,345 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-09-25 08:00:14,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:00:14,358 INFO L225 Difference]: With dead ends: 110 [2020-09-25 08:00:14,358 INFO L226 Difference]: Without dead ends: 58 [2020-09-25 08:00:14,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 08:00:14,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-25 08:00:14,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-09-25 08:00:14,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-25 08:00:14,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2020-09-25 08:00:14,423 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 26 [2020-09-25 08:00:14,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:00:14,423 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2020-09-25 08:00:14,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 08:00:14,424 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2020-09-25 08:00:14,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 08:00:14,425 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:00:14,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:00:14,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 08:00:14,426 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:00:14,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:00:14,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1779758876, now seen corresponding path program 1 times [2020-09-25 08:00:14,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:00:14,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923952107] [2020-09-25 08:00:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:00:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:14,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:14,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:14,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:14,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-25 08:00:14,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:00:14,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 535 [2020-09-25 08:00:14,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:14,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:14,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 08:00:14,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 08:00:14,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 08:00:14,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:15,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:00:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:15,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:15,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:15,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:00:15,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:15,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 08:00:15,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:15,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:15,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:15,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:15,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:15,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:00:15,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923952107] [2020-09-25 08:00:15,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:00:15,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 08:00:15,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914372956] [2020-09-25 08:00:15,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 08:00:15,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:00:15,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 08:00:15,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 08:00:15,082 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 6 states. [2020-09-25 08:00:15,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:00:15,403 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2020-09-25 08:00:15,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 08:00:15,404 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-09-25 08:00:15,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:00:15,406 INFO L225 Difference]: With dead ends: 125 [2020-09-25 08:00:15,406 INFO L226 Difference]: Without dead ends: 84 [2020-09-25 08:00:15,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 08:00:15,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-25 08:00:15,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 60. [2020-09-25 08:00:15,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-25 08:00:15,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-09-25 08:00:15,422 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 26 [2020-09-25 08:00:15,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:00:15,422 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-09-25 08:00:15,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 08:00:15,423 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-09-25 08:00:15,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 08:00:15,424 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:00:15,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:00:15,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 08:00:15,425 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:00:15,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:00:15,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1567937856, now seen corresponding path program 1 times [2020-09-25 08:00:15,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:00:15,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379193143] [2020-09-25 08:00:15,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:00:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:15,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:15,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:15,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-25 08:00:15,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:15,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-09-25 08:00:15,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:15,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:15,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 08:00:15,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-09-25 08:00:15,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 08:00:15,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:15,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:00:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:15,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:15,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:15,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:00:15,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:15,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 08:00:15,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:15,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:15,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:15,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:15,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:15,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 08:00:15,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379193143] [2020-09-25 08:00:15,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:00:15,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-25 08:00:15,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548389609] [2020-09-25 08:00:15,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 08:00:15,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:00:15,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 08:00:15,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 08:00:15,860 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 10 states. [2020-09-25 08:00:16,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:00:16,289 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-09-25 08:00:16,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 08:00:16,289 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-09-25 08:00:16,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:00:16,291 INFO L225 Difference]: With dead ends: 68 [2020-09-25 08:00:16,291 INFO L226 Difference]: Without dead ends: 66 [2020-09-25 08:00:16,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-25 08:00:16,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-25 08:00:16,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-09-25 08:00:16,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-25 08:00:16,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-09-25 08:00:16,301 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 33 [2020-09-25 08:00:16,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:00:16,302 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-09-25 08:00:16,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 08:00:16,302 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-09-25 08:00:16,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-25 08:00:16,303 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:00:16,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:00:16,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 08:00:16,304 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:00:16,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:00:16,305 INFO L82 PathProgramCache]: Analyzing trace with hash -741681537, now seen corresponding path program 1 times [2020-09-25 08:00:16,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:00:16,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956121168] [2020-09-25 08:00:16,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:00:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:16,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:16,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:16,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:17,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:19,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:19,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-25 08:00:19,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 08:00:19,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2778 [2020-09-25 08:00:19,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:19,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:19,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 08:00:19,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 08:00:19,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-25 08:00:19,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:19,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:00:19,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:19,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:19,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:19,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:00:19,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:19,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 08:00:19,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:19,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:19,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:19,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:19,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:19,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 08:00:19,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956121168] [2020-09-25 08:00:19,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:00:19,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 08:00:19,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075445449] [2020-09-25 08:00:19,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 08:00:19,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:00:19,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 08:00:19,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-09-25 08:00:19,357 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 12 states. [2020-09-25 08:00:19,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:00:19,977 INFO L93 Difference]: Finished difference Result 133 states and 147 transitions. [2020-09-25 08:00:19,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 08:00:19,978 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-09-25 08:00:19,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:00:19,980 INFO L225 Difference]: With dead ends: 133 [2020-09-25 08:00:19,980 INFO L226 Difference]: Without dead ends: 131 [2020-09-25 08:00:19,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-25 08:00:19,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-25 08:00:19,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-09-25 08:00:19,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-25 08:00:19,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2020-09-25 08:00:19,994 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 42 [2020-09-25 08:00:19,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:00:19,995 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2020-09-25 08:00:19,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 08:00:19,995 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2020-09-25 08:00:19,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 08:00:19,997 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:00:19,997 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:00:19,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 08:00:19,998 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:00:19,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:00:19,998 INFO L82 PathProgramCache]: Analyzing trace with hash 583132947, now seen corresponding path program 1 times [2020-09-25 08:00:19,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:00:19,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942516333] [2020-09-25 08:00:19,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:00:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:20,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:20,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:20,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:22,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:22,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:24,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:25,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:25,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 08:00:25,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 08:00:25,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 08:00:25,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:25,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:25,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 08:00:25,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 08:00:25,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 08:00:25,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 08:00:25,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:00:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:25,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:25,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:25,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:00:25,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:25,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 08:00:25,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:25,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:25,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:25,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:25,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:25,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 08:00:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 08:00:25,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942516333] [2020-09-25 08:00:25,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:00:25,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 08:00:25,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113209001] [2020-09-25 08:00:25,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 08:00:25,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:00:25,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 08:00:25,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-25 08:00:25,166 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand 10 states. [2020-09-25 08:00:25,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:00:25,539 INFO L93 Difference]: Finished difference Result 199 states and 225 transitions. [2020-09-25 08:00:25,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 08:00:25,540 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2020-09-25 08:00:25,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:00:25,547 INFO L225 Difference]: With dead ends: 199 [2020-09-25 08:00:25,548 INFO L226 Difference]: Without dead ends: 151 [2020-09-25 08:00:25,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-25 08:00:25,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-25 08:00:25,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 121. [2020-09-25 08:00:25,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-25 08:00:25,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2020-09-25 08:00:25,576 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 49 [2020-09-25 08:00:25,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:00:25,577 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2020-09-25 08:00:25,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 08:00:25,577 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2020-09-25 08:00:25,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-25 08:00:25,582 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:00:25,582 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:00:25,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 08:00:25,586 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:00:25,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:00:25,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1432806336, now seen corresponding path program 1 times [2020-09-25 08:00:25,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:00:25,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303235266] [2020-09-25 08:00:25,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:00:25,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:25,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:25,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:25,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:25,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:26,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:28,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:28,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:30,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:30,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 08:00:30,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 08:00:30,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 08:00:30,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:30,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:30,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 08:00:30,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 08:00:30,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 08:00:30,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:30,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:00:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:30,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:30,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:30,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:00:30,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:30,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 08:00:30,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:30,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:30,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:30,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:30,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:30,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:30,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-25 08:00:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:30,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:30,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:30,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-09-25 08:00:30,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:30,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-25 08:00:30,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:30,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:30,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 08:00:30,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:30,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 08:00:30,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:30,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-25 08:00:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:30,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:30,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:30,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:00:30,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:30,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 08:00:30,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:30,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:30,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 08:00:30,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:30,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 08:00:30,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 08:00:30,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303235266] [2020-09-25 08:00:30,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:00:30,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 08:00:30,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500786478] [2020-09-25 08:00:30,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 08:00:30,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:00:30,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 08:00:30,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-09-25 08:00:30,924 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand 12 states. [2020-09-25 08:00:31,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:00:31,599 INFO L93 Difference]: Finished difference Result 178 states and 197 transitions. [2020-09-25 08:00:31,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 08:00:31,600 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-09-25 08:00:31,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:00:31,601 INFO L225 Difference]: With dead ends: 178 [2020-09-25 08:00:31,601 INFO L226 Difference]: Without dead ends: 129 [2020-09-25 08:00:31,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-09-25 08:00:31,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-25 08:00:31,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 102. [2020-09-25 08:00:31,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-25 08:00:31,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2020-09-25 08:00:31,613 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 53 [2020-09-25 08:00:31,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:00:31,613 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2020-09-25 08:00:31,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 08:00:31,613 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2020-09-25 08:00:31,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-25 08:00:31,615 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:00:31,615 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:00:31,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 08:00:31,615 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:00:31,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:00:31,616 INFO L82 PathProgramCache]: Analyzing trace with hash -2046698769, now seen corresponding path program 2 times [2020-09-25 08:00:31,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:00:31,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806837834] [2020-09-25 08:00:31,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:00:31,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:31,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:31,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:31,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:34,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:36,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:36,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 08:00:36,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 08:00:36,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 08:00:36,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:36,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:36,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 08:00:36,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 08:00:36,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 08:00:36,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:36,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:00:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:36,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:36,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:36,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:00:36,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:36,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 08:00:36,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:36,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:36,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:36,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:36,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:36,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 08:00:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-25 08:00:36,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806837834] [2020-09-25 08:00:36,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:00:36,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 08:00:36,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121236133] [2020-09-25 08:00:36,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 08:00:36,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:00:36,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 08:00:36,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-25 08:00:36,789 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand 10 states. [2020-09-25 08:00:37,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:00:37,294 INFO L93 Difference]: Finished difference Result 159 states and 173 transitions. [2020-09-25 08:00:37,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 08:00:37,296 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-09-25 08:00:37,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:00:37,297 INFO L225 Difference]: With dead ends: 159 [2020-09-25 08:00:37,298 INFO L226 Difference]: Without dead ends: 119 [2020-09-25 08:00:37,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-09-25 08:00:37,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-25 08:00:37,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2020-09-25 08:00:37,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-25 08:00:37,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2020-09-25 08:00:37,328 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 56 [2020-09-25 08:00:37,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:00:37,330 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2020-09-25 08:00:37,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 08:00:37,330 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2020-09-25 08:00:37,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-25 08:00:37,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:00:37,332 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:00:37,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 08:00:37,336 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:00:37,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:00:37,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1800344370, now seen corresponding path program 3 times [2020-09-25 08:00:37,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:00:37,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92496754] [2020-09-25 08:00:37,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:00:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:37,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:37,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:37,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:37,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:38,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:39,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:39,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:40,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:40,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:42,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:42,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 08:00:42,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 08:00:42,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-09-25 08:00:42,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:42,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:42,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 08:00:42,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-09-25 08:00:42,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 08:00:42,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:42,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:00:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:42,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:42,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:42,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:00:42,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:42,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 08:00:42,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:42,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:42,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:42,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:42,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:42,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-09-25 08:00:42,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92496754] [2020-09-25 08:00:42,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:00:42,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 08:00:42,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204452362] [2020-09-25 08:00:42,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 08:00:42,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:00:42,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 08:00:42,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-25 08:00:42,565 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand 8 states. [2020-09-25 08:00:42,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:00:42,954 INFO L93 Difference]: Finished difference Result 153 states and 166 transitions. [2020-09-25 08:00:42,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 08:00:42,955 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-09-25 08:00:42,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:00:42,957 INFO L225 Difference]: With dead ends: 153 [2020-09-25 08:00:42,957 INFO L226 Difference]: Without dead ends: 132 [2020-09-25 08:00:42,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-25 08:00:42,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-25 08:00:42,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 115. [2020-09-25 08:00:42,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-25 08:00:42,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2020-09-25 08:00:42,977 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 63 [2020-09-25 08:00:42,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:00:42,978 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2020-09-25 08:00:42,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 08:00:42,978 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2020-09-25 08:00:42,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-09-25 08:00:42,981 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:00:42,981 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:00:42,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 08:00:42,981 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:00:42,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:00:42,982 INFO L82 PathProgramCache]: Analyzing trace with hash 56994667, now seen corresponding path program 1 times [2020-09-25 08:00:42,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:00:42,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048458036] [2020-09-25 08:00:42,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:00:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:43,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:43,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:43,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:44,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:44,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:44,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:46,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:48,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:48,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-09-25 08:00:48,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 08:00:48,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-25 08:00:48,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:48,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:48,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 08:00:48,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-09-25 08:00:48,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-09-25 08:00:48,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:00:48,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:00:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:48,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:48,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:48,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:00:48,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:48,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 08:00:48,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:48,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:48,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:48,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:48,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:48,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:00:48,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-25 08:00:48,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:48,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:48,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:48,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-09-25 08:00:48,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:48,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 08:00:48,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:48,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:48,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:00:48,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:48,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 08:00:48,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:48,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-25 08:00:48,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:48,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:48,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:48,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:00:48,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:48,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 08:00:48,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:48,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:48,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:48,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:48,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:48,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-25 08:00:48,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048458036] [2020-09-25 08:00:48,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:00:48,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 08:00:48,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322182035] [2020-09-25 08:00:48,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 08:00:48,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:00:48,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 08:00:48,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-09-25 08:00:48,398 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand 16 states. [2020-09-25 08:00:49,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:00:49,480 INFO L93 Difference]: Finished difference Result 210 states and 233 transitions. [2020-09-25 08:00:49,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 08:00:49,481 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 74 [2020-09-25 08:00:49,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:00:49,484 INFO L225 Difference]: With dead ends: 210 [2020-09-25 08:00:49,484 INFO L226 Difference]: Without dead ends: 208 [2020-09-25 08:00:49,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2020-09-25 08:00:49,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-25 08:00:49,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 171. [2020-09-25 08:00:49,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-25 08:00:49,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 190 transitions. [2020-09-25 08:00:49,497 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 190 transitions. Word has length 74 [2020-09-25 08:00:49,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:00:49,497 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 190 transitions. [2020-09-25 08:00:49,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 08:00:49,498 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 190 transitions. [2020-09-25 08:00:49,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-25 08:00:49,499 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:00:49,499 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:00:49,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 08:00:49,500 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:00:49,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:00:49,500 INFO L82 PathProgramCache]: Analyzing trace with hash 122566130, now seen corresponding path program 1 times [2020-09-25 08:00:49,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:00:49,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65267343] [2020-09-25 08:00:49,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:00:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:49,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:49,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:49,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:50,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:50,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:51,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:51,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:54,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:54,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-09-25 08:00:54,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 08:00:54,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-25 08:00:54,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:54,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:54,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 08:00:54,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-09-25 08:00:54,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 08:00:54,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:00:54,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:00:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:54,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:54,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:54,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:00:54,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:54,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 08:00:54,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:54,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:54,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:54,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:54,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:54,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 08:00:54,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-25 08:00:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:54,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:54,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:54,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-09-25 08:00:54,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:54,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-25 08:00:54,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:54,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:54,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 08:00:54,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:54,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 08:00:54,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:54,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-25 08:00:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:54,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:54,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:54,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:00:54,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:54,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-25 08:00:54,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:54,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:54,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 08:00:54,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:54,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 08:00:54,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:54,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-25 08:00:54,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:54,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:54,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:54,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-09-25 08:00:54,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:54,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 08:00:54,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:54,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:54,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:00:54,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:54,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 08:00:54,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:00:54,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-25 08:00:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:54,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:54,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:54,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:00:54,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:54,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 08:00:54,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:54,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:54,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:54,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:54,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:54,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:00:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-25 08:00:54,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65267343] [2020-09-25 08:00:54,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:00:54,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 08:00:54,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483502200] [2020-09-25 08:00:54,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 08:00:54,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:00:54,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 08:00:54,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-09-25 08:00:54,952 INFO L87 Difference]: Start difference. First operand 171 states and 190 transitions. Second operand 16 states. [2020-09-25 08:00:56,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:00:56,057 INFO L93 Difference]: Finished difference Result 232 states and 257 transitions. [2020-09-25 08:00:56,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-25 08:00:56,058 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 85 [2020-09-25 08:00:56,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:00:56,060 INFO L225 Difference]: With dead ends: 232 [2020-09-25 08:00:56,060 INFO L226 Difference]: Without dead ends: 211 [2020-09-25 08:00:56,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2020-09-25 08:00:56,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-09-25 08:00:56,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 179. [2020-09-25 08:00:56,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-09-25 08:00:56,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 198 transitions. [2020-09-25 08:00:56,073 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 198 transitions. Word has length 85 [2020-09-25 08:00:56,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:00:56,073 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 198 transitions. [2020-09-25 08:00:56,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 08:00:56,074 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 198 transitions. [2020-09-25 08:00:56,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-25 08:00:56,075 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:00:56,075 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:00:56,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 08:00:56,075 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:00:56,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:00:56,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1319497895, now seen corresponding path program 2 times [2020-09-25 08:00:56,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:00:56,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223778086] [2020-09-25 08:00:56,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:00:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:56,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:56,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:56,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:56,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:56,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:57,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking...