/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:33:38,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:33:38,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:33:38,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:33:38,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:33:38,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:33:38,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:33:38,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:33:38,756 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:33:38,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:33:38,760 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:33:38,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:33:38,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:33:38,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:33:38,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:33:38,767 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:33:38,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:33:38,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:33:38,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:33:38,779 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:33:38,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:33:38,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:33:38,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:33:38,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:33:38,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:33:38,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:33:38,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:33:38,802 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:33:38,803 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:33:38,804 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:33:38,804 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:33:38,805 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:33:38,808 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:33:38,809 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:33:38,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:33:38,810 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:33:38,811 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:33:38,811 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:33:38,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:33:38,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:33:38,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:33:38,813 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 05:33:38,835 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:33:38,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:33:38,836 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:33:38,837 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:33:38,837 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:33:38,837 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:33:38,837 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:33:38,837 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:33:38,838 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:33:38,838 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:33:38,838 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:33:38,838 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:33:38,838 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:33:38,838 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:33:38,839 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:33:38,839 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:33:38,839 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:33:38,839 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:33:38,839 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:33:38,840 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:33:38,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:33:38,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:33:38,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:33:38,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:33:38,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:33:38,841 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:33:38,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:33:38,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:33:38,841 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:33:38,841 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:33:39,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:33:39,156 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:33:39,159 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:33:39,161 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:33:39,161 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:33:39,162 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt9.c [2020-10-14 05:33:39,229 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6951bc042/27b94ba1847644b0bc444086f017e3c3/FLAG980d3b60b [2020-10-14 05:33:39,704 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:33:39,705 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/sumt9.c [2020-10-14 05:33:39,711 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6951bc042/27b94ba1847644b0bc444086f017e3c3/FLAG980d3b60b [2020-10-14 05:33:40,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6951bc042/27b94ba1847644b0bc444086f017e3c3 [2020-10-14 05:33:40,107 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:33:40,109 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:33:40,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:33:40,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:33:40,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:33:40,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:33:40" (1/1) ... [2020-10-14 05:33:40,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f1dcb10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:33:40, skipping insertion in model container [2020-10-14 05:33:40,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:33:40" (1/1) ... [2020-10-14 05:33:40,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:33:40,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:33:40,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:33:40,342 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:33:40,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:33:40,380 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:33:40,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:33:40 WrapperNode [2020-10-14 05:33:40,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:33:40,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:33:40,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:33:40,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:33:40,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:33:40" (1/1) ... [2020-10-14 05:33:40,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:33:40" (1/1) ... [2020-10-14 05:33:40,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:33:40" (1/1) ... [2020-10-14 05:33:40,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:33:40" (1/1) ... [2020-10-14 05:33:40,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:33:40" (1/1) ... [2020-10-14 05:33:40,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:33:40" (1/1) ... [2020-10-14 05:33:40,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:33:40" (1/1) ... [2020-10-14 05:33:40,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:33:40,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:33:40,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:33:40,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:33:40,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:33:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:33:40,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:33:40,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:33:40,600 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 05:33:40,600 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:33:40,600 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:33:40,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:33:40,601 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 05:33:40,601 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 05:33:40,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:33:40,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 05:33:40,601 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:33:40,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:33:40,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:33:40,904 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:33:40,905 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 05:33:40,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:33:40 BoogieIcfgContainer [2020-10-14 05:33:40,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:33:40,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:33:40,911 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:33:40,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:33:40,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:33:40" (1/3) ... [2020-10-14 05:33:40,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@290fde6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:33:40, skipping insertion in model container [2020-10-14 05:33:40,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:33:40" (2/3) ... [2020-10-14 05:33:40,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@290fde6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:33:40, skipping insertion in model container [2020-10-14 05:33:40,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:33:40" (3/3) ... [2020-10-14 05:33:40,919 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt9.c [2020-10-14 05:33:40,930 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:33:40,938 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:33:40,953 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:33:40,980 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:33:40,980 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:33:40,980 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:33:40,980 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:33:40,980 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:33:40,981 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:33:40,981 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:33:40,981 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:33:41,001 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-14 05:33:41,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:33:41,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:33:41,009 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:33:41,010 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:33:41,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:33:41,022 INFO L82 PathProgramCache]: Analyzing trace with hash -684006215, now seen corresponding path program 1 times [2020-10-14 05:33:41,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:33:41,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758221145] [2020-10-14 05:33:41,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:33:41,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:41,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:41,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:41,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:33:41,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:41,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 478 [2020-10-14 05:33:41,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:41,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:41,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:33:41,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:33:41,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:33:41,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 05:33:42,105 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 29 [2020-10-14 05:33:42,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:33:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:42,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:42,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:42,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:33:42,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:42,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 05:33:42,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:42,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:42,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:33:42,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:33:42,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:33:42,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:33:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:33:42,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758221145] [2020-10-14 05:33:42,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:33:42,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-14 05:33:42,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155021615] [2020-10-14 05:33:42,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:33:42,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:33:42,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:33:42,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:33:42,201 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 8 states. [2020-10-14 05:33:46,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:33:46,873 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2020-10-14 05:33:46,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:33:46,876 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-10-14 05:33:46,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:33:46,898 INFO L225 Difference]: With dead ends: 74 [2020-10-14 05:33:46,898 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 05:33:46,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:33:46,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 05:33:46,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2020-10-14 05:33:46,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 05:33:46,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-10-14 05:33:46,944 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 14 [2020-10-14 05:33:46,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:33:46,945 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-10-14 05:33:46,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:33:46,945 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-10-14 05:33:46,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:33:46,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:33:46,947 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:33:46,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:33:46,948 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:33:46,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:33:46,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1109543218, now seen corresponding path program 1 times [2020-10-14 05:33:46,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:33:46,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368073506] [2020-10-14 05:33:46,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:33:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:46,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:47,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:47,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:47,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:47,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:47,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:33:47,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:33:47,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 923 [2020-10-14 05:33:47,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:47,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:47,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:33:47,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:33:47,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:33:47,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:33:48,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:33:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:48,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:48,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:48,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:33:48,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:48,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:33:48,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:48,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:48,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:33:48,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:33:48,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:33:48,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:33:48,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-14 05:33:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:48,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:48,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:48,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:33:48,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:48,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 05:33:48,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:48,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:48,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:33:48,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:33:48,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:33:48,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:33:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:33:48,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368073506] [2020-10-14 05:33:48,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:33:48,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:33:48,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581063066] [2020-10-14 05:33:48,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:33:48,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:33:48,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:33:48,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:33:48,060 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 5 states. [2020-10-14 05:33:48,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:33:48,356 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2020-10-14 05:33:48,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:33:48,357 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-14 05:33:48,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:33:48,358 INFO L225 Difference]: With dead ends: 59 [2020-10-14 05:33:48,358 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 05:33:48,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:33:48,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 05:33:48,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2020-10-14 05:33:48,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 05:33:48,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-10-14 05:33:48,369 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 22 [2020-10-14 05:33:48,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:33:48,370 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-10-14 05:33:48,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:33:48,370 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-10-14 05:33:48,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 05:33:48,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:33:48,371 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:33:48,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:33:48,372 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:33:48,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:33:48,372 INFO L82 PathProgramCache]: Analyzing trace with hash 817844156, now seen corresponding path program 1 times [2020-10-14 05:33:48,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:33:48,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124858298] [2020-10-14 05:33:48,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:33:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:48,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:48,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:48,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:49,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:49,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:33:49,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:33:49,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 746 [2020-10-14 05:33:49,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:49,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:49,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:33:49,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:33:49,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:33:49,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:33:49,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:33:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:49,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:49,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:49,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:33:49,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:49,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:33:49,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:49,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:49,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:33:49,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:33:49,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:33:49,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:33:49,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-14 05:33:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:49,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:49,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:49,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:33:49,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:49,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 05:33:49,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:49,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:49,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:33:49,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:33:49,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:33:49,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:33:49,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:33:49,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124858298] [2020-10-14 05:33:49,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:33:49,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:33:49,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921816458] [2020-10-14 05:33:49,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:33:49,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:33:49,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:33:49,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:33:49,251 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 5 states. [2020-10-14 05:33:49,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:33:49,436 INFO L93 Difference]: Finished difference Result 59 states and 82 transitions. [2020-10-14 05:33:49,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:33:49,437 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-14 05:33:49,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:33:49,438 INFO L225 Difference]: With dead ends: 59 [2020-10-14 05:33:49,438 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 05:33:49,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:33:49,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 05:33:49,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-10-14 05:33:49,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 05:33:49,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2020-10-14 05:33:49,447 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 23 [2020-10-14 05:33:49,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:33:49,448 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2020-10-14 05:33:49,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:33:49,448 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2020-10-14 05:33:49,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:33:49,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:33:49,449 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:33:49,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:33:49,449 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:33:49,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:33:49,450 INFO L82 PathProgramCache]: Analyzing trace with hash 508253581, now seen corresponding path program 1 times [2020-10-14 05:33:49,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:33:49,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950688435] [2020-10-14 05:33:49,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:33:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:49,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:49,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:50,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:56,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:56,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:33:56,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:33:56,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7315 [2020-10-14 05:33:56,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:56,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:56,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:33:56,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:33:56,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:33:56,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:33:56,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:33:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:56,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:56,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:56,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:33:56,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:56,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:33:56,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:56,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:56,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:33:56,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:33:56,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:33:56,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:33:56,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-14 05:33:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:56,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:56,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:56,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:33:56,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:56,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 05:33:56,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:56,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:56,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:33:56,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:33:56,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:33:56,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:33:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:33:56,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950688435] [2020-10-14 05:33:56,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:33:56,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:33:56,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717343787] [2020-10-14 05:33:56,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:33:56,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:33:56,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:33:56,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:33:56,950 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 5 states. [2020-10-14 05:33:57,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:33:57,223 INFO L93 Difference]: Finished difference Result 59 states and 81 transitions. [2020-10-14 05:33:57,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:33:57,224 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-14 05:33:57,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:33:57,225 INFO L225 Difference]: With dead ends: 59 [2020-10-14 05:33:57,225 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 05:33:57,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:33:57,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 05:33:57,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-10-14 05:33:57,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 05:33:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2020-10-14 05:33:57,246 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 24 [2020-10-14 05:33:57,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:33:57,246 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2020-10-14 05:33:57,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:33:57,247 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2020-10-14 05:33:57,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:33:57,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:33:57,248 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:33:57,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:33:57,249 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:33:57,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:33:57,251 INFO L82 PathProgramCache]: Analyzing trace with hash -355973897, now seen corresponding path program 1 times [2020-10-14 05:33:57,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:33:57,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713784330] [2020-10-14 05:33:57,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:33:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:57,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:57,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:59,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:34:04,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:34:04,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 05:34:04,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:34:04,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7374 [2020-10-14 05:34:04,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:34:04,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:34:04,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:34:04,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:34:04,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:34:04,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:34:04,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:34:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:34:04,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:34:04,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:34:04,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:34:04,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:34:04,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:34:04,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:34:04,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:34:04,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:34:04,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:34:04,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:34:04,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:34:04,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-14 05:34:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:34:04,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:34:04,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:34:04,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:34:04,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:34:04,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 05:34:04,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:34:04,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:34:04,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:34:04,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:34:04,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:34:04,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:34:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:34:04,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713784330] [2020-10-14 05:34:04,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:34:04,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:34:04,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366068512] [2020-10-14 05:34:04,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:34:04,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:34:04,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:34:04,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:34:04,789 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 5 states. [2020-10-14 05:34:04,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:34:04,976 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2020-10-14 05:34:04,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:34:04,977 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-14 05:34:04,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:34:04,978 INFO L225 Difference]: With dead ends: 55 [2020-10-14 05:34:04,978 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 05:34:04,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:34:04,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 05:34:04,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-14 05:34:04,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 05:34:04,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-10-14 05:34:04,986 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 25 [2020-10-14 05:34:04,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:34:04,986 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-10-14 05:34:04,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:34:04,987 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-10-14 05:34:04,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:34:04,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:34:04,988 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:34:04,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:34:04,988 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:34:04,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:34:04,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1234076184, now seen corresponding path program 1 times [2020-10-14 05:34:04,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:34:04,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835033129] [2020-10-14 05:34:04,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:34:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:34:05,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:35:10,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:35:10,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:35:10,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:35:10,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65297 [2020-10-14 05:35:10,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:35:10,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:35:10,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:35:10,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:35:10,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:35:10,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:35:10,479 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 22 [2020-10-14 05:35:10,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:35:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:35:10,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:35:10,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:35:10,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:35:10,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:35:10,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:35:10,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:35:10,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:35:10,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:35:10,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:35:10,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:35:10,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:35:10,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-14 05:35:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:35:10,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:35:10,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:35:10,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:35:10,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:35:10,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 05:35:10,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:35:10,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:35:10,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:35:10,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:35:10,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:35:10,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:35:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:35:10,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835033129] [2020-10-14 05:35:10,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:35:10,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:35:10,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987403060] [2020-10-14 05:35:10,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:35:10,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:35:10,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:35:10,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:35:10,517 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 5 states. [2020-10-14 05:35:10,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:35:10,746 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2020-10-14 05:35:10,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:35:10,747 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-14 05:35:10,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:35:10,748 INFO L225 Difference]: With dead ends: 59 [2020-10-14 05:35:10,748 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 05:35:10,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:35:10,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 05:35:10,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-10-14 05:35:10,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 05:35:10,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-10-14 05:35:10,755 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 26 [2020-10-14 05:35:10,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:35:10,755 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-10-14 05:35:10,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:35:10,756 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-10-14 05:35:10,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 05:35:10,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:35:10,757 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:35:10,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:35:10,757 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:35:10,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:35:10,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1752669746, now seen corresponding path program 1 times [2020-10-14 05:35:10,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:35:10,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080792545] [2020-10-14 05:35:10,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:35:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:35:10,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:35:29,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:35:29,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 05:35:29,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:35:29,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18703 [2020-10-14 05:35:29,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:35:29,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:35:29,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:35:29,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 05:35:29,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:35:29,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:35:29,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:35:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:35:29,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:35:29,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:35:29,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:35:29,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:35:29,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:35:29,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:35:29,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:35:29,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:35:29,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:35:29,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:35:29,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:35:29,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-14 05:35:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:35:29,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:35:29,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:35:29,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:35:29,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:35:29,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 05:35:29,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:35:29,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:35:29,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:35:29,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:35:29,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:35:29,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:35:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:35:29,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080792545] [2020-10-14 05:35:29,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:35:29,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:35:29,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394382743] [2020-10-14 05:35:29,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:35:29,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:35:29,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:35:29,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:35:29,629 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 9 states. [2020-10-14 05:35:34,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:35:34,120 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-10-14 05:35:34,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:35:34,120 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-14 05:35:34,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:35:34,123 INFO L225 Difference]: With dead ends: 46 [2020-10-14 05:35:34,124 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 05:35:34,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:35:34,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 05:35:34,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-14 05:35:34,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 05:35:34,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-14 05:35:34,132 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 27 [2020-10-14 05:35:34,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:35:34,132 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-14 05:35:34,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:35:34,132 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-14 05:35:34,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 05:35:34,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:35:34,133 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:35:34,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:35:34,134 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:35:34,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:35:34,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1563298987, now seen corresponding path program 1 times [2020-10-14 05:35:34,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:35:34,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793653631] [2020-10-14 05:35:34,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:35:34,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:35:34,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:16,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:28,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:37:28,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 05:37:28,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:37:28,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114383 [2020-10-14 05:37:28,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:37:28,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:37:28,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:37:28,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:37:28,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 05:37:28,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:37:28,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:37:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:37:28,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:28,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:37:28,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:37:28,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:37:28,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:37:28,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:37:28,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:37:28,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:37:28,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:37:28,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:37:28,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:37:28,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-14 05:37:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:37:28,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:28,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:37:28,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:37:28,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:37:28,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 05:37:28,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:37:28,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:37:28,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:37:28,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:37:28,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:37:28,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:37:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:37:28,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793653631] [2020-10-14 05:37:28,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:37:28,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:37:28,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993687912] [2020-10-14 05:37:28,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:37:28,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:37:28,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:37:28,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:37:28,896 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 10 states. [2020-10-14 05:37:29,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:37:29,633 INFO L93 Difference]: Finished difference Result 85 states and 113 transitions. [2020-10-14 05:37:29,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:37:29,634 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-14 05:37:29,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:37:29,635 INFO L225 Difference]: With dead ends: 85 [2020-10-14 05:37:29,635 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 05:37:29,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:37:29,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 05:37:29,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2020-10-14 05:37:29,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 05:37:29,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-14 05:37:29,644 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 29 [2020-10-14 05:37:29,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:37:29,645 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-14 05:37:29,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:37:29,645 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-14 05:37:29,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 05:37:29,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:37:29,646 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:37:29,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:37:29,647 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:37:29,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:37:29,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1200341625, now seen corresponding path program 2 times [2020-10-14 05:37:29,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:37:29,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250918520] [2020-10-14 05:37:29,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:37:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:37:29,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:37:29,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking...