/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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/array-examples/standard_copy9_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 17:52:04,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 17:52:04,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 17:52:04,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 17:52:04,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 17:52:04,722 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 17:52:04,724 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 17:52:04,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 17:52:04,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 17:52:04,734 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 17:52:04,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 17:52:04,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 17:52:04,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 17:52:04,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 17:52:04,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 17:52:04,744 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 17:52:04,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 17:52:04,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 17:52:04,748 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 17:52:04,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 17:52:04,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 17:52:04,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 17:52:04,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 17:52:04,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 17:52:04,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 17:52:04,766 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 17:52:04,766 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 17:52:04,769 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 17:52:04,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 17:52:04,771 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 17:52:04,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 17:52:04,772 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 17:52:04,772 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 17:52:04,774 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 17:52:04,775 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 17:52:04,775 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 17:52:04,776 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 17:52:04,776 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 17:52:04,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 17:52:04,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 17:52:04,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 17:52:04,779 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 17:52:04,822 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 17:52:04,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 17:52:04,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 17:52:04,825 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 17:52:04,825 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 17:52:04,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 17:52:04,825 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 17:52:04,826 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 17:52:04,826 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 17:52:04,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 17:52:04,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 17:52:04,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 17:52:04,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 17:52:04,828 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 17:52:04,828 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 17:52:04,828 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 17:52:04,828 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 17:52:04,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 17:52:04,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 17:52:04,829 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 17:52:04,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 17:52:04,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:52:04,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 17:52:04,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 17:52:04,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 17:52:04,830 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 17:52:04,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 17:52:04,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 17:52:04,831 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 17:52:04,831 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 17:52:05,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 17:52:05,169 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 17:52:05,173 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 17:52:05,175 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 17:52:05,175 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 17:52:05,176 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-1.i [2020-10-14 17:52:05,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0814de092/84146efece1d432787313c54c897641c/FLAGbfa737929 [2020-10-14 17:52:05,711 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 17:52:05,712 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy9_ground-1.i [2020-10-14 17:52:05,719 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0814de092/84146efece1d432787313c54c897641c/FLAGbfa737929 [2020-10-14 17:52:06,061 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0814de092/84146efece1d432787313c54c897641c [2020-10-14 17:52:06,072 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 17:52:06,074 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 17:52:06,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 17:52:06,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 17:52:06,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 17:52:06,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:52:06" (1/1) ... [2020-10-14 17:52:06,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dcacee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:52:06, skipping insertion in model container [2020-10-14 17:52:06,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:52:06" (1/1) ... [2020-10-14 17:52:06,091 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 17:52:06,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 17:52:06,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:52:06,301 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 17:52:06,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:52:06,449 INFO L208 MainTranslator]: Completed translation [2020-10-14 17:52:06,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:52:06 WrapperNode [2020-10-14 17:52:06,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 17:52:06,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 17:52:06,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 17:52:06,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 17:52:06,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:52:06" (1/1) ... [2020-10-14 17:52:06,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:52:06" (1/1) ... [2020-10-14 17:52:06,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:52:06" (1/1) ... [2020-10-14 17:52:06,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:52:06" (1/1) ... [2020-10-14 17:52:06,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:52:06" (1/1) ... [2020-10-14 17:52:06,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:52:06" (1/1) ... [2020-10-14 17:52:06,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:52:06" (1/1) ... [2020-10-14 17:52:06,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 17:52:06,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 17:52:06,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 17:52:06,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 17:52:06,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:52:06" (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 17:52:06,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 17:52:06,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 17:52:06,572 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 17:52:06,572 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 17:52:06,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 17:52:06,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 17:52:06,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 17:52:06,573 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 17:52:06,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 17:52:06,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 17:52:06,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 17:52:06,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 17:52:06,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 17:52:06,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 17:52:07,054 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 17:52:07,054 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-14 17:52:07,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:52:07 BoogieIcfgContainer [2020-10-14 17:52:07,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 17:52:07,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 17:52:07,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 17:52:07,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 17:52:07,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:52:06" (1/3) ... [2020-10-14 17:52:07,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e2c115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:52:07, skipping insertion in model container [2020-10-14 17:52:07,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:52:06" (2/3) ... [2020-10-14 17:52:07,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e2c115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:52:07, skipping insertion in model container [2020-10-14 17:52:07,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:52:07" (3/3) ... [2020-10-14 17:52:07,068 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-1.i [2020-10-14 17:52:07,079 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 17:52:07,087 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 17:52:07,101 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 17:52:07,125 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 17:52:07,125 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 17:52:07,125 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 17:52:07,125 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 17:52:07,126 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 17:52:07,126 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 17:52:07,126 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 17:52:07,126 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 17:52:07,144 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-10-14 17:52:07,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 17:52:07,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:07,152 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] [2020-10-14 17:52:07,152 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:07,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:07,157 INFO L82 PathProgramCache]: Analyzing trace with hash -178932642, now seen corresponding path program 1 times [2020-10-14 17:52:07,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:07,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802765477] [2020-10-14 17:52:07,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:07,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:07,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:07,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:07,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:07,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:07,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:07,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:07,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:08,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:08,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:10,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:10,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 17:52:10,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 17:52:10,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3070 [2020-10-14 17:52:10,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:10,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:10,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:52:10,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 17:52:10,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:52:10,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 17:52:10,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:10,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:10,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:10,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:10,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:10,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 17:52:10,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:10,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:10,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:10,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:10,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:10,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:10,498 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 17:52:10,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802765477] [2020-10-14 17:52:10,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:52:10,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 17:52:10,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393503224] [2020-10-14 17:52:10,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 17:52:10,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:10,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 17:52:10,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 17:52:10,531 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 4 states. [2020-10-14 17:52:10,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:10,888 INFO L93 Difference]: Finished difference Result 112 states and 173 transitions. [2020-10-14 17:52:10,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 17:52:10,896 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-14 17:52:10,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:10,911 INFO L225 Difference]: With dead ends: 112 [2020-10-14 17:52:10,912 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 17:52:10,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 17:52:10,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 17:52:10,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2020-10-14 17:52:10,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 17:52:10,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2020-10-14 17:52:11,000 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 31 [2020-10-14 17:52:11,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:11,001 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2020-10-14 17:52:11,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 17:52:11,002 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2020-10-14 17:52:11,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 17:52:11,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:11,007 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:11,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 17:52:11,008 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:11,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:11,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1898370412, now seen corresponding path program 1 times [2020-10-14 17:52:11,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:11,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38204642] [2020-10-14 17:52:11,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:11,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:11,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:11,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:11,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:11,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:11,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:11,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:12,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:16,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:16,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 17:52:16,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:52:16,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:52:16,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:16,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:16,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 17:52:16,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:52:16,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 17:52:16,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:16,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:16,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:16,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:16,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:16,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:16,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:52:16,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:16,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:16,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:16,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:16,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:16,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 17:52:16,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38204642] [2020-10-14 17:52:16,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:16,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 17:52:16,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808237728] [2020-10-14 17:52:16,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 17:52:16,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:16,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 17:52:16,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:52:16,125 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 5 states. [2020-10-14 17:52:16,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:16,387 INFO L93 Difference]: Finished difference Result 125 states and 152 transitions. [2020-10-14 17:52:16,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 17:52:16,387 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-10-14 17:52:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:16,389 INFO L225 Difference]: With dead ends: 125 [2020-10-14 17:52:16,389 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 17:52:16,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:52:16,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 17:52:16,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2020-10-14 17:52:16,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 17:52:16,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2020-10-14 17:52:16,402 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 49 [2020-10-14 17:52:16,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:16,403 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2020-10-14 17:52:16,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 17:52:16,403 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2020-10-14 17:52:16,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 17:52:16,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:16,405 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 17:52:16,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 17:52:16,406 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:16,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:16,406 INFO L82 PathProgramCache]: Analyzing trace with hash -885045022, now seen corresponding path program 2 times [2020-10-14 17:52:16,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:16,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532756130] [2020-10-14 17:52:16,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:16,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:16,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:16,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:16,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:16,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:16,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:16,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:21,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:21,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:21,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 17:52:21,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:52:21,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 17:52:21,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:21,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:21,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:52:21,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 17:52:21,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:52:21,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:21,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:21,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:21,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:21,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:21,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:21,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 17:52:21,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:21,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:21,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:21,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:21,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:21,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-14 17:52:21,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532756130] [2020-10-14 17:52:21,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:21,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 17:52:21,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944624489] [2020-10-14 17:52:21,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:52:21,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:21,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:52:21,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:52:21,502 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand 6 states. [2020-10-14 17:52:21,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:21,824 INFO L93 Difference]: Finished difference Result 159 states and 186 transitions. [2020-10-14 17:52:21,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 17:52:21,825 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-14 17:52:21,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:21,826 INFO L225 Difference]: With dead ends: 159 [2020-10-14 17:52:21,826 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 17:52:21,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:52:21,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 17:52:21,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 91. [2020-10-14 17:52:21,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-14 17:52:21,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2020-10-14 17:52:21,838 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 67 [2020-10-14 17:52:21,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:21,839 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2020-10-14 17:52:21,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:52:21,839 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2020-10-14 17:52:21,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-14 17:52:21,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:21,841 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-14 17:52:21,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 17:52:21,841 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:21,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:21,842 INFO L82 PathProgramCache]: Analyzing trace with hash 433336240, now seen corresponding path program 3 times [2020-10-14 17:52:21,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:21,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248993978] [2020-10-14 17:52:21,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:21,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:21,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:21,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:21,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:21,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:21,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:22,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:26,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:26,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-14 17:52:26,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:52:26,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-14 17:52:26,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:26,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:26,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:52:26,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-14 17:52:26,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 17:52:26,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 17:52:26,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:26,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:26,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:26,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:26,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:26,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:52:26,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:26,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:26,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:26,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:26,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:26,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-14 17:52:26,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248993978] [2020-10-14 17:52:26,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:26,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 17:52:26,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531057258] [2020-10-14 17:52:26,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 17:52:26,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:26,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 17:52:26,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:52:26,959 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand 7 states. [2020-10-14 17:52:27,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:27,291 INFO L93 Difference]: Finished difference Result 193 states and 220 transitions. [2020-10-14 17:52:27,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 17:52:27,292 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 85 [2020-10-14 17:52:27,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:27,293 INFO L225 Difference]: With dead ends: 193 [2020-10-14 17:52:27,294 INFO L226 Difference]: Without dead ends: 118 [2020-10-14 17:52:27,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:52:27,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-14 17:52:27,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 109. [2020-10-14 17:52:27,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-14 17:52:27,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2020-10-14 17:52:27,315 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 85 [2020-10-14 17:52:27,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:27,317 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2020-10-14 17:52:27,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 17:52:27,318 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2020-10-14 17:52:27,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-14 17:52:27,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:27,321 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-10-14 17:52:27,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 17:52:27,322 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:27,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:27,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1458127106, now seen corresponding path program 4 times [2020-10-14 17:52:27,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:27,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054622477] [2020-10-14 17:52:27,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:27,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:27,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:27,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:27,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:27,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:27,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:29,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:32,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:32,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-14 17:52:32,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:52:32,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-14 17:52:32,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:32,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:32,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 17:52:32,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:52:32,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 17:52:32,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:32,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:32,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:32,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:32,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:32,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:32,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:32,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:32,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:32,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:32,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:32,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:32,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-14 17:52:32,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054622477] [2020-10-14 17:52:32,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:32,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 17:52:32,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626841177] [2020-10-14 17:52:32,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 17:52:32,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:32,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 17:52:32,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:52:32,476 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand 8 states. [2020-10-14 17:52:32,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:32,842 INFO L93 Difference]: Finished difference Result 227 states and 254 transitions. [2020-10-14 17:52:32,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 17:52:32,842 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 103 [2020-10-14 17:52:32,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:32,844 INFO L225 Difference]: With dead ends: 227 [2020-10-14 17:52:32,844 INFO L226 Difference]: Without dead ends: 136 [2020-10-14 17:52:32,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:52:32,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-14 17:52:32,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 127. [2020-10-14 17:52:32,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-14 17:52:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2020-10-14 17:52:32,855 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 103 [2020-10-14 17:52:32,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:32,856 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2020-10-14 17:52:32,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 17:52:32,856 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2020-10-14 17:52:32,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-14 17:52:32,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:32,858 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2020-10-14 17:52:32,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 17:52:32,858 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:32,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:32,859 INFO L82 PathProgramCache]: Analyzing trace with hash -846342452, now seen corresponding path program 5 times [2020-10-14 17:52:32,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:32,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084944789] [2020-10-14 17:52:32,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:32,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:32,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:32,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:32,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:32,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:32,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:35,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:37,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:37,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-14 17:52:37,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:52:37,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 17:52:37,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:37,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:37,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 17:52:37,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 17:52:37,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 17:52:37,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:37,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:37,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:37,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:37,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:37,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:37,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:37,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:37,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:37,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:37,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:37,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:37,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-10-14 17:52:37,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084944789] [2020-10-14 17:52:37,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:37,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 17:52:37,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107233558] [2020-10-14 17:52:37,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 17:52:37,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:37,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 17:52:37,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:52:37,980 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand 9 states. [2020-10-14 17:52:38,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:38,356 INFO L93 Difference]: Finished difference Result 261 states and 288 transitions. [2020-10-14 17:52:38,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 17:52:38,356 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 121 [2020-10-14 17:52:38,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:38,358 INFO L225 Difference]: With dead ends: 261 [2020-10-14 17:52:38,358 INFO L226 Difference]: Without dead ends: 154 [2020-10-14 17:52:38,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:52:38,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-14 17:52:38,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 145. [2020-10-14 17:52:38,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-14 17:52:38,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2020-10-14 17:52:38,369 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 121 [2020-10-14 17:52:38,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:38,369 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2020-10-14 17:52:38,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 17:52:38,369 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2020-10-14 17:52:38,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-14 17:52:38,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:38,371 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2020-10-14 17:52:38,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 17:52:38,372 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:38,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:38,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1882695910, now seen corresponding path program 6 times [2020-10-14 17:52:38,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:38,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456590024] [2020-10-14 17:52:38,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:38,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:38,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:38,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:38,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:38,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:38,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:42,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:43,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:43,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-14 17:52:43,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:52:43,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-14 17:52:43,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:43,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:43,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:52:43,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:52:43,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 17:52:43,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:43,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:43,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:43,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:43,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:43,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:43,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:43,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:43,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:43,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:43,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:43,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:43,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:43,581 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-14 17:52:43,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456590024] [2020-10-14 17:52:43,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:43,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:52:43,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265954084] [2020-10-14 17:52:43,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:52:43,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:43,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:52:43,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:52:43,584 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand 10 states. [2020-10-14 17:52:44,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:44,168 INFO L93 Difference]: Finished difference Result 295 states and 322 transitions. [2020-10-14 17:52:44,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 17:52:44,169 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 139 [2020-10-14 17:52:44,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:44,171 INFO L225 Difference]: With dead ends: 295 [2020-10-14 17:52:44,171 INFO L226 Difference]: Without dead ends: 172 [2020-10-14 17:52:44,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:52:44,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-14 17:52:44,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 163. [2020-10-14 17:52:44,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-14 17:52:44,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 173 transitions. [2020-10-14 17:52:44,181 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 173 transitions. Word has length 139 [2020-10-14 17:52:44,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:44,181 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 173 transitions. [2020-10-14 17:52:44,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:52:44,182 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 173 transitions. [2020-10-14 17:52:44,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-14 17:52:44,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:44,184 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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] [2020-10-14 17:52:44,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 17:52:44,184 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:44,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:44,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1168302104, now seen corresponding path program 7 times [2020-10-14 17:52:44,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:44,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636463116] [2020-10-14 17:52:44,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:44,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:44,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:44,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:44,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:44,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:44,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:49,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:49,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-14 17:52:49,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:52:49,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-14 17:52:49,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:49,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:49,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 17:52:49,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-14 17:52:49,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 17:52:49,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:49,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:49,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:49,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:49,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:49,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:49,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:49,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:49,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:49,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:49,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:49,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:49,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-14 17:52:49,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636463116] [2020-10-14 17:52:49,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:49,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 17:52:49,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297836314] [2020-10-14 17:52:49,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 17:52:49,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:49,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 17:52:49,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:52:49,357 INFO L87 Difference]: Start difference. First operand 163 states and 173 transitions. Second operand 11 states. [2020-10-14 17:52:49,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:49,880 INFO L93 Difference]: Finished difference Result 329 states and 356 transitions. [2020-10-14 17:52:49,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 17:52:49,881 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 157 [2020-10-14 17:52:49,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:49,882 INFO L225 Difference]: With dead ends: 329 [2020-10-14 17:52:49,882 INFO L226 Difference]: Without dead ends: 190 [2020-10-14 17:52:49,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:52:49,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-14 17:52:49,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 181. [2020-10-14 17:52:49,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-14 17:52:49,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 191 transitions. [2020-10-14 17:52:49,897 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 191 transitions. Word has length 157 [2020-10-14 17:52:49,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:49,897 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 191 transitions. [2020-10-14 17:52:49,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 17:52:49,898 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 191 transitions. [2020-10-14 17:52:49,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-14 17:52:49,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:49,900 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2020-10-14 17:52:49,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 17:52:49,900 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:49,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:49,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1743458614, now seen corresponding path program 8 times [2020-10-14 17:52:49,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:49,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216598910] [2020-10-14 17:52:49,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:49,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:49,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:49,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:49,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:50,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:50,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:55,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:55,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-14 17:52:55,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:52:55,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5208 [2020-10-14 17:52:55,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:55,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:55,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:52:55,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-14 17:52:55,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 17:52:55,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:55,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:55,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:55,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:55,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:55,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:55,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:55,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:55,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:55,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:55,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:55,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:55,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-10-14 17:52:55,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216598910] [2020-10-14 17:52:55,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:55,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:52:55,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138001604] [2020-10-14 17:52:55,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:52:55,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:55,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:52:55,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:52:55,270 INFO L87 Difference]: Start difference. First operand 181 states and 191 transitions. Second operand 12 states. [2020-10-14 17:52:55,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:55,873 INFO L93 Difference]: Finished difference Result 363 states and 390 transitions. [2020-10-14 17:52:55,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 17:52:55,873 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 175 [2020-10-14 17:52:55,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:55,875 INFO L225 Difference]: With dead ends: 363 [2020-10-14 17:52:55,875 INFO L226 Difference]: Without dead ends: 208 [2020-10-14 17:52:55,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:52:55,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-14 17:52:55,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 199. [2020-10-14 17:52:55,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-14 17:52:55,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 209 transitions. [2020-10-14 17:52:55,884 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 209 transitions. Word has length 175 [2020-10-14 17:52:55,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:55,884 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 209 transitions. [2020-10-14 17:52:55,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:52:55,885 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 209 transitions. [2020-10-14 17:52:55,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-14 17:52:55,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:55,887 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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] [2020-10-14 17:52:55,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 17:52:55,888 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:55,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:55,888 INFO L82 PathProgramCache]: Analyzing trace with hash 286853892, now seen corresponding path program 9 times [2020-10-14 17:52:55,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:55,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782390743] [2020-10-14 17:52:55,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:55,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:55,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:55,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:55,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:55,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:55,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:56,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:00,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:00,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-14 17:53:00,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:53:00,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-14 17:53:00,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:00,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:00,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 17:53:00,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-14 17:53:00,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 17:53:00,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:01,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:01,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:01,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:01,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:01,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:01,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:01,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:01,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:01,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:01,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:01,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:01,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:01,125 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-10-14 17:53:01,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782390743] [2020-10-14 17:53:01,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:01,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 17:53:01,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372132712] [2020-10-14 17:53:01,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 17:53:01,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:01,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 17:53:01,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:53:01,127 INFO L87 Difference]: Start difference. First operand 199 states and 209 transitions. Second operand 13 states. [2020-10-14 17:53:01,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:01,774 INFO L93 Difference]: Finished difference Result 397 states and 424 transitions. [2020-10-14 17:53:01,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:53:01,775 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 193 [2020-10-14 17:53:01,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:01,777 INFO L225 Difference]: With dead ends: 397 [2020-10-14 17:53:01,777 INFO L226 Difference]: Without dead ends: 226 [2020-10-14 17:53:01,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:53:01,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-14 17:53:01,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 217. [2020-10-14 17:53:01,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-14 17:53:01,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 227 transitions. [2020-10-14 17:53:01,788 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 227 transitions. Word has length 193 [2020-10-14 17:53:01,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:01,788 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 227 transitions. [2020-10-14 17:53:01,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 17:53:01,788 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 227 transitions. [2020-10-14 17:53:01,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-14 17:53:01,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:01,791 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2020-10-14 17:53:01,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 17:53:01,791 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:01,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:01,792 INFO L82 PathProgramCache]: Analyzing trace with hash 446033234, now seen corresponding path program 10 times [2020-10-14 17:53:01,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:01,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214556408] [2020-10-14 17:53:01,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:01,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:01,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:01,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:01,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:01,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:01,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:06,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:06,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-14 17:53:06,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:53:06,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-14 17:53:06,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:06,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:06,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:53:06,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-14 17:53:06,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 17:53:06,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:06,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:06,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:06,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:06,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:06,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:06,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:06,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:06,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:06,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:06,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:06,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:06,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-10-14 17:53:06,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214556408] [2020-10-14 17:53:06,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:06,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:53:06,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928712641] [2020-10-14 17:53:06,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:53:06,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:06,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:53:06,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:53:07,000 INFO L87 Difference]: Start difference. First operand 217 states and 227 transitions. Second operand 14 states. [2020-10-14 17:53:07,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:07,659 INFO L93 Difference]: Finished difference Result 431 states and 458 transitions. [2020-10-14 17:53:07,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 17:53:07,659 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 211 [2020-10-14 17:53:07,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:07,662 INFO L225 Difference]: With dead ends: 431 [2020-10-14 17:53:07,662 INFO L226 Difference]: Without dead ends: 244 [2020-10-14 17:53:07,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:53:07,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-14 17:53:07,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 235. [2020-10-14 17:53:07,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-14 17:53:07,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 245 transitions. [2020-10-14 17:53:07,673 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 245 transitions. Word has length 211 [2020-10-14 17:53:07,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:07,673 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 245 transitions. [2020-10-14 17:53:07,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:53:07,674 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 245 transitions. [2020-10-14 17:53:07,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-14 17:53:07,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:07,676 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 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] [2020-10-14 17:53:07,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 17:53:07,677 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:07,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:07,677 INFO L82 PathProgramCache]: Analyzing trace with hash -484927456, now seen corresponding path program 11 times [2020-10-14 17:53:07,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:07,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181769632] [2020-10-14 17:53:07,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:07,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:07,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:07,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:07,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:07,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:07,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:12,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:12,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-10-14 17:53:12,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:53:12,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-14 17:53:12,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:12,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:12,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:53:12,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-14 17:53:12,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 17:53:12,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:12,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:12,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:12,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:12,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:12,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:12,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:12,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:12,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:12,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:12,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:12,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:12,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2020-10-14 17:53:12,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181769632] [2020-10-14 17:53:12,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:12,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 17:53:12,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255232985] [2020-10-14 17:53:12,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 17:53:12,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:12,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 17:53:12,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:53:12,909 INFO L87 Difference]: Start difference. First operand 235 states and 245 transitions. Second operand 15 states. [2020-10-14 17:53:13,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:13,622 INFO L93 Difference]: Finished difference Result 465 states and 492 transitions. [2020-10-14 17:53:13,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 17:53:13,622 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 229 [2020-10-14 17:53:13,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:13,625 INFO L225 Difference]: With dead ends: 465 [2020-10-14 17:53:13,625 INFO L226 Difference]: Without dead ends: 262 [2020-10-14 17:53:13,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:53:13,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-14 17:53:13,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 253. [2020-10-14 17:53:13,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-14 17:53:13,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 263 transitions. [2020-10-14 17:53:13,635 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 263 transitions. Word has length 229 [2020-10-14 17:53:13,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:13,635 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 263 transitions. [2020-10-14 17:53:13,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 17:53:13,635 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 263 transitions. [2020-10-14 17:53:13,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-10-14 17:53:13,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:13,639 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 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] [2020-10-14 17:53:13,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 17:53:13,639 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:13,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:13,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1365240686, now seen corresponding path program 12 times [2020-10-14 17:53:13,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:13,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441797223] [2020-10-14 17:53:13,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:13,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:13,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:13,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:13,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:13,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:13,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:13,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:18,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:18,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-14 17:53:18,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:53:18,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-14 17:53:18,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:18,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:18,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:53:18,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-14 17:53:18,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 17:53:18,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:18,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:18,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:18,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:18,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:18,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:18,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:18,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:18,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:18,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:18,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:18,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:18,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2020-10-14 17:53:18,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441797223] [2020-10-14 17:53:18,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:18,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:53:18,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939772949] [2020-10-14 17:53:18,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:53:18,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:18,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:53:18,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:53:18,924 INFO L87 Difference]: Start difference. First operand 253 states and 263 transitions. Second operand 16 states. [2020-10-14 17:53:19,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:19,664 INFO L93 Difference]: Finished difference Result 499 states and 526 transitions. [2020-10-14 17:53:19,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:53:19,664 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 247 [2020-10-14 17:53:19,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:19,666 INFO L225 Difference]: With dead ends: 499 [2020-10-14 17:53:19,666 INFO L226 Difference]: Without dead ends: 280 [2020-10-14 17:53:19,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:53:19,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-14 17:53:19,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 271. [2020-10-14 17:53:19,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-14 17:53:19,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 281 transitions. [2020-10-14 17:53:19,682 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 281 transitions. Word has length 247 [2020-10-14 17:53:19,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:19,683 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 281 transitions. [2020-10-14 17:53:19,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:53:19,683 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 281 transitions. [2020-10-14 17:53:19,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-14 17:53:19,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:19,685 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 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] [2020-10-14 17:53:19,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 17:53:19,685 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:19,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:19,685 INFO L82 PathProgramCache]: Analyzing trace with hash -499988676, now seen corresponding path program 13 times [2020-10-14 17:53:19,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:19,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761302432] [2020-10-14 17:53:19,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:19,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:19,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:19,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:19,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:19,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:19,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:24,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:24,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-14 17:53:24,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:53:24,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-14 17:53:24,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:24,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:24,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 17:53:24,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-14 17:53:24,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 17:53:24,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:24,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:24,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:24,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:24,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:24,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:24,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:24,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:24,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:24,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:24,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:24,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:24,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:24,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:25,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2020-10-14 17:53:25,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761302432] [2020-10-14 17:53:25,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:25,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 17:53:25,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797607693] [2020-10-14 17:53:25,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 17:53:25,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:25,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 17:53:25,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:53:25,021 INFO L87 Difference]: Start difference. First operand 271 states and 281 transitions. Second operand 17 states. [2020-10-14 17:53:25,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:25,770 INFO L93 Difference]: Finished difference Result 533 states and 560 transitions. [2020-10-14 17:53:25,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 17:53:25,771 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 265 [2020-10-14 17:53:25,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:25,774 INFO L225 Difference]: With dead ends: 533 [2020-10-14 17:53:25,774 INFO L226 Difference]: Without dead ends: 298 [2020-10-14 17:53:25,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:53:25,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-14 17:53:25,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 289. [2020-10-14 17:53:25,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-14 17:53:25,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 299 transitions. [2020-10-14 17:53:25,787 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 299 transitions. Word has length 265 [2020-10-14 17:53:25,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:25,788 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 299 transitions. [2020-10-14 17:53:25,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 17:53:25,788 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 299 transitions. [2020-10-14 17:53:25,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-14 17:53:25,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:25,790 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 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] [2020-10-14 17:53:25,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 17:53:25,790 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:25,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:25,791 INFO L82 PathProgramCache]: Analyzing trace with hash 912264074, now seen corresponding path program 14 times [2020-10-14 17:53:25,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:25,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194541389] [2020-10-14 17:53:25,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:25,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:25,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:25,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:25,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:25,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:25,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:30,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:30,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 291 [2020-10-14 17:53:30,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:53:30,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5164 [2020-10-14 17:53:30,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:30,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:30,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:53:30,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-14 17:53:30,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 17:53:30,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:31,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:31,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:31,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:31,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:31,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:31,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:31,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:31,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:31,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:31,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:31,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:31,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:31,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2020-10-14 17:53:31,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194541389] [2020-10-14 17:53:31,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:31,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 17:53:31,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776200696] [2020-10-14 17:53:31,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 17:53:31,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:31,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 17:53:31,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:53:31,210 INFO L87 Difference]: Start difference. First operand 289 states and 299 transitions. Second operand 18 states. [2020-10-14 17:53:31,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:31,979 INFO L93 Difference]: Finished difference Result 567 states and 594 transitions. [2020-10-14 17:53:31,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 17:53:31,980 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 283 [2020-10-14 17:53:31,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:31,981 INFO L225 Difference]: With dead ends: 567 [2020-10-14 17:53:31,982 INFO L226 Difference]: Without dead ends: 316 [2020-10-14 17:53:31,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:53:31,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-14 17:53:31,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 307. [2020-10-14 17:53:31,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-10-14 17:53:31,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 317 transitions. [2020-10-14 17:53:31,994 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 317 transitions. Word has length 283 [2020-10-14 17:53:31,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:31,994 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 317 transitions. [2020-10-14 17:53:31,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 17:53:31,994 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 317 transitions. [2020-10-14 17:53:31,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-14 17:53:31,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:31,997 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 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] [2020-10-14 17:53:31,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 17:53:31,997 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:31,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:31,998 INFO L82 PathProgramCache]: Analyzing trace with hash 549361752, now seen corresponding path program 15 times [2020-10-14 17:53:31,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:31,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59383688] [2020-10-14 17:53:31,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:32,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:32,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:32,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:32,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:32,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:32,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:37,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:37,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 309 [2020-10-14 17:53:37,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:53:37,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5269 [2020-10-14 17:53:37,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:37,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:37,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 17:53:37,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 141 [2020-10-14 17:53:37,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 17:53:37,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:37,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:37,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:37,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:37,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:37,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:37,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:37,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:37,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:37,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:37,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:37,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:37,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2020-10-14 17:53:37,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59383688] [2020-10-14 17:53:37,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:37,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 17:53:37,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158313573] [2020-10-14 17:53:37,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 17:53:37,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:37,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 17:53:37,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:53:37,564 INFO L87 Difference]: Start difference. First operand 307 states and 317 transitions. Second operand 19 states. [2020-10-14 17:53:38,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:38,496 INFO L93 Difference]: Finished difference Result 601 states and 628 transitions. [2020-10-14 17:53:38,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 17:53:38,497 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 301 [2020-10-14 17:53:38,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:38,499 INFO L225 Difference]: With dead ends: 601 [2020-10-14 17:53:38,499 INFO L226 Difference]: Without dead ends: 334 [2020-10-14 17:53:38,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:53:38,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-14 17:53:38,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 325. [2020-10-14 17:53:38,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-14 17:53:38,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 335 transitions. [2020-10-14 17:53:38,515 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 335 transitions. Word has length 301 [2020-10-14 17:53:38,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:38,516 INFO L479 AbstractCegarLoop]: Abstraction has 325 states and 335 transitions. [2020-10-14 17:53:38,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 17:53:38,516 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 335 transitions. [2020-10-14 17:53:38,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-14 17:53:38,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:38,519 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 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] [2020-10-14 17:53:38,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 17:53:38,519 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:38,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:38,520 INFO L82 PathProgramCache]: Analyzing trace with hash 875384230, now seen corresponding path program 16 times [2020-10-14 17:53:38,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:38,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816147837] [2020-10-14 17:53:38,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:38,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:38,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:38,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:38,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:38,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:38,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:43,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:43,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-14 17:53:43,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:53:43,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5125 [2020-10-14 17:53:43,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:43,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:43,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 17:53:43,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 149 [2020-10-14 17:53:43,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 17:53:43,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:43,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:43,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:43,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:43,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:43,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:43,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:43,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:43,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:43,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:43,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:43,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:43,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2020-10-14 17:53:43,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816147837] [2020-10-14 17:53:43,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:43,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 17:53:43,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548091564] [2020-10-14 17:53:43,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 17:53:43,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:43,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 17:53:43,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:53:43,965 INFO L87 Difference]: Start difference. First operand 325 states and 335 transitions. Second operand 20 states. [2020-10-14 17:53:44,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:44,948 INFO L93 Difference]: Finished difference Result 635 states and 662 transitions. [2020-10-14 17:53:44,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 17:53:44,949 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 319 [2020-10-14 17:53:44,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:44,951 INFO L225 Difference]: With dead ends: 635 [2020-10-14 17:53:44,951 INFO L226 Difference]: Without dead ends: 352 [2020-10-14 17:53:44,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:53:44,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-14 17:53:44,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 343. [2020-10-14 17:53:44,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-10-14 17:53:44,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 353 transitions. [2020-10-14 17:53:44,968 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 353 transitions. Word has length 319 [2020-10-14 17:53:44,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:44,968 INFO L479 AbstractCegarLoop]: Abstraction has 343 states and 353 transitions. [2020-10-14 17:53:44,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 17:53:44,969 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 353 transitions. [2020-10-14 17:53:44,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-14 17:53:44,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:44,973 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 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] [2020-10-14 17:53:44,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 17:53:44,973 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:44,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:44,974 INFO L82 PathProgramCache]: Analyzing trace with hash -778892428, now seen corresponding path program 17 times [2020-10-14 17:53:44,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:44,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450877208] [2020-10-14 17:53:44,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:45,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:45,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:45,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:45,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:45,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:45,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:50,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:50,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 345 [2020-10-14 17:53:50,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:53:50,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5237 [2020-10-14 17:53:50,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:50,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:50,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 17:53:50,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-14 17:53:50,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 17:53:50,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:50,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:50,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:50,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:50,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:50,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:50,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:50,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:50,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:50,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:50,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:50,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:50,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:50,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2020-10-14 17:53:50,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450877208] [2020-10-14 17:53:50,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:50,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 17:53:50,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675660146] [2020-10-14 17:53:50,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 17:53:50,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:50,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 17:53:50,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:53:50,578 INFO L87 Difference]: Start difference. First operand 343 states and 353 transitions. Second operand 21 states. [2020-10-14 17:53:51,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:51,590 INFO L93 Difference]: Finished difference Result 669 states and 696 transitions. [2020-10-14 17:53:51,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 17:53:51,591 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 337 [2020-10-14 17:53:51,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:51,593 INFO L225 Difference]: With dead ends: 669 [2020-10-14 17:53:51,594 INFO L226 Difference]: Without dead ends: 370 [2020-10-14 17:53:51,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:53:51,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-10-14 17:53:51,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 361. [2020-10-14 17:53:51,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-10-14 17:53:51,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 371 transitions. [2020-10-14 17:53:51,614 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 371 transitions. Word has length 337 [2020-10-14 17:53:51,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:51,615 INFO L479 AbstractCegarLoop]: Abstraction has 361 states and 371 transitions. [2020-10-14 17:53:51,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 17:53:51,616 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 371 transitions. [2020-10-14 17:53:51,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2020-10-14 17:53:51,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:51,618 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 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] [2020-10-14 17:53:51,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 17:53:51,619 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:51,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:51,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1243696702, now seen corresponding path program 18 times [2020-10-14 17:53:51,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:51,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553143451] [2020-10-14 17:53:51,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:51,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:51,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:51,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:51,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:51,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:51,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:57,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:57,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 363 [2020-10-14 17:53:57,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:53:57,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5406 [2020-10-14 17:53:57,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:57,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:57,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 17:53:57,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-14 17:53:57,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 17:53:57,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:57,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:57,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:57,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:57,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:57,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:57,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:57,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:57,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:57,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:57,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:57,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:57,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:57,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:57,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2592 trivial. 0 not checked. [2020-10-14 17:53:57,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553143451] [2020-10-14 17:53:57,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:57,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 17:53:57,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852169169] [2020-10-14 17:53:57,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 17:53:57,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:57,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 17:53:57,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:53:57,404 INFO L87 Difference]: Start difference. First operand 361 states and 371 transitions. Second operand 22 states. [2020-10-14 17:53:58,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:58,412 INFO L93 Difference]: Finished difference Result 703 states and 730 transitions. [2020-10-14 17:53:58,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 17:53:58,412 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 355 [2020-10-14 17:53:58,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:58,414 INFO L225 Difference]: With dead ends: 703 [2020-10-14 17:53:58,414 INFO L226 Difference]: Without dead ends: 388 [2020-10-14 17:53:58,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:53:58,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-10-14 17:53:58,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 379. [2020-10-14 17:53:58,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-10-14 17:53:58,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 389 transitions. [2020-10-14 17:53:58,432 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 389 transitions. Word has length 355 [2020-10-14 17:53:58,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:58,432 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 389 transitions. [2020-10-14 17:53:58,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 17:53:58,432 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 389 transitions. [2020-10-14 17:53:58,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2020-10-14 17:53:58,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:58,435 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 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] [2020-10-14 17:53:58,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 17:53:58,435 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:58,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:58,436 INFO L82 PathProgramCache]: Analyzing trace with hash 134684816, now seen corresponding path program 19 times [2020-10-14 17:53:58,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:58,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518013977] [2020-10-14 17:53:58,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:58,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:58,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:58,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:58,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:58,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:58,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:03,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:03,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 381 [2020-10-14 17:54:03,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:54:03,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5313 [2020-10-14 17:54:03,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:03,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:03,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 17:54:03,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-14 17:54:03,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 17:54:03,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:04,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:04,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:04,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:04,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:04,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:04,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:04,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:04,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:04,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:04,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:04,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:04,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:54:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2888 trivial. 0 not checked. [2020-10-14 17:54:04,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518013977] [2020-10-14 17:54:04,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:04,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 17:54:04,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436008851] [2020-10-14 17:54:04,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 17:54:04,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:04,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 17:54:04,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:54:04,373 INFO L87 Difference]: Start difference. First operand 379 states and 389 transitions. Second operand 23 states. [2020-10-14 17:54:05,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:05,517 INFO L93 Difference]: Finished difference Result 737 states and 764 transitions. [2020-10-14 17:54:05,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 17:54:05,518 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 373 [2020-10-14 17:54:05,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:05,521 INFO L225 Difference]: With dead ends: 737 [2020-10-14 17:54:05,521 INFO L226 Difference]: Without dead ends: 406 [2020-10-14 17:54:05,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:54:05,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-10-14 17:54:05,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 397. [2020-10-14 17:54:05,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-10-14 17:54:05,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 407 transitions. [2020-10-14 17:54:05,536 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 407 transitions. Word has length 373 [2020-10-14 17:54:05,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:05,536 INFO L479 AbstractCegarLoop]: Abstraction has 397 states and 407 transitions. [2020-10-14 17:54:05,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 17:54:05,536 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 407 transitions. [2020-10-14 17:54:05,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-10-14 17:54:05,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:05,539 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 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] [2020-10-14 17:54:05,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 17:54:05,539 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:05,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:05,540 INFO L82 PathProgramCache]: Analyzing trace with hash -418695202, now seen corresponding path program 20 times [2020-10-14 17:54:05,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:05,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250770992] [2020-10-14 17:54:05,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:05,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:05,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:05,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:05,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:05,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:05,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:10,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:10,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 399 [2020-10-14 17:54:10,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:54:10,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5367 [2020-10-14 17:54:10,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:10,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:10,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 17:54:10,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 181 [2020-10-14 17:54:10,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 17:54:10,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:11,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:11,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:11,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:11,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:11,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:11,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:11,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:11,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:11,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:11,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:11,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:11,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:11,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:54:11,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 3200 trivial. 0 not checked. [2020-10-14 17:54:11,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250770992] [2020-10-14 17:54:11,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:11,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 17:54:11,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163268568] [2020-10-14 17:54:11,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 17:54:11,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:11,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 17:54:11,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:54:11,583 INFO L87 Difference]: Start difference. First operand 397 states and 407 transitions. Second operand 24 states. [2020-10-14 17:54:12,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:12,636 INFO L93 Difference]: Finished difference Result 771 states and 798 transitions. [2020-10-14 17:54:12,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 17:54:12,636 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 391 [2020-10-14 17:54:12,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:12,639 INFO L225 Difference]: With dead ends: 771 [2020-10-14 17:54:12,639 INFO L226 Difference]: Without dead ends: 424 [2020-10-14 17:54:12,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:54:12,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-10-14 17:54:12,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 415. [2020-10-14 17:54:12,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2020-10-14 17:54:12,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 425 transitions. [2020-10-14 17:54:12,651 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 425 transitions. Word has length 391 [2020-10-14 17:54:12,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:12,652 INFO L479 AbstractCegarLoop]: Abstraction has 415 states and 425 transitions. [2020-10-14 17:54:12,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 17:54:12,652 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 425 transitions. [2020-10-14 17:54:12,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-10-14 17:54:12,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:12,655 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 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] [2020-10-14 17:54:12,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 17:54:12,655 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:12,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:12,656 INFO L82 PathProgramCache]: Analyzing trace with hash 2012338092, now seen corresponding path program 21 times [2020-10-14 17:54:12,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:12,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736950043] [2020-10-14 17:54:12,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:12,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:12,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:12,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:12,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:12,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:12,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:18,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:19,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 417 [2020-10-14 17:54:19,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:54:19,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6323 [2020-10-14 17:54:19,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:19,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:19,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 17:54:19,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-14 17:54:19,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 17:54:19,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:54:19,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:19,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:19,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:19,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:19,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:19,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:19,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:19,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:19,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:19,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:19,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:19,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:54:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 3528 trivial. 0 not checked. [2020-10-14 17:54:19,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736950043] [2020-10-14 17:54:19,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:19,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 17:54:19,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096508575] [2020-10-14 17:54:19,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 17:54:19,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:19,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 17:54:19,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:54:19,535 INFO L87 Difference]: Start difference. First operand 415 states and 425 transitions. Second operand 25 states. [2020-10-14 17:54:20,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:20,661 INFO L93 Difference]: Finished difference Result 805 states and 832 transitions. [2020-10-14 17:54:20,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 17:54:20,664 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 409 [2020-10-14 17:54:20,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:20,667 INFO L225 Difference]: With dead ends: 805 [2020-10-14 17:54:20,667 INFO L226 Difference]: Without dead ends: 442 [2020-10-14 17:54:20,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:54:20,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2020-10-14 17:54:20,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 433. [2020-10-14 17:54:20,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-10-14 17:54:20,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 443 transitions. [2020-10-14 17:54:20,680 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 443 transitions. Word has length 409 [2020-10-14 17:54:20,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:20,680 INFO L479 AbstractCegarLoop]: Abstraction has 433 states and 443 transitions. [2020-10-14 17:54:20,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 17:54:20,680 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 443 transitions. [2020-10-14 17:54:20,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2020-10-14 17:54:20,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:20,683 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 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] [2020-10-14 17:54:20,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 17:54:20,684 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:20,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:20,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1942609914, now seen corresponding path program 22 times [2020-10-14 17:54:20,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:20,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914267291] [2020-10-14 17:54:20,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:20,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:20,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:20,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:20,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:20,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:21,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:21,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:25,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:25,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 435 [2020-10-14 17:54:25,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:54:25,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-14 17:54:25,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:25,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:25,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 17:54:25,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-14 17:54:25,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 17:54:25,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:26,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:26,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:26,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:26,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:26,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:26,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:26,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:26,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:26,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:26,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:26,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:26,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3872 trivial. 0 not checked. [2020-10-14 17:54:26,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914267291] [2020-10-14 17:54:26,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:26,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 17:54:26,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243176278] [2020-10-14 17:54:26,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 17:54:26,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:26,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 17:54:26,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:54:26,268 INFO L87 Difference]: Start difference. First operand 433 states and 443 transitions. Second operand 26 states. [2020-10-14 17:54:27,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:27,370 INFO L93 Difference]: Finished difference Result 839 states and 866 transitions. [2020-10-14 17:54:27,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 17:54:27,370 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 427 [2020-10-14 17:54:27,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:27,373 INFO L225 Difference]: With dead ends: 839 [2020-10-14 17:54:27,373 INFO L226 Difference]: Without dead ends: 460 [2020-10-14 17:54:27,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:54:27,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-14 17:54:27,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 451. [2020-10-14 17:54:27,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-10-14 17:54:27,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 461 transitions. [2020-10-14 17:54:27,387 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 461 transitions. Word has length 427 [2020-10-14 17:54:27,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:27,387 INFO L479 AbstractCegarLoop]: Abstraction has 451 states and 461 transitions. [2020-10-14 17:54:27,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 17:54:27,388 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 461 transitions. [2020-10-14 17:54:27,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2020-10-14 17:54:27,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:27,391 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 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] [2020-10-14 17:54:27,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 17:54:27,391 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:27,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:27,392 INFO L82 PathProgramCache]: Analyzing trace with hash 900346056, now seen corresponding path program 23 times [2020-10-14 17:54:27,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:27,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972580169] [2020-10-14 17:54:27,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:27,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:27,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:27,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:27,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:27,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:27,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:33,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:33,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 453 [2020-10-14 17:54:33,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:54:33,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5771 [2020-10-14 17:54:33,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:33,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:33,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 17:54:33,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 205 [2020-10-14 17:54:33,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 17:54:33,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:54:33,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:33,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:33,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:33,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:33,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:33,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:33,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:33,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:33,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:33,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:33,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:33,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2020-10-14 17:54:33,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972580169] [2020-10-14 17:54:33,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:33,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 17:54:33,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262443439] [2020-10-14 17:54:33,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 17:54:33,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:33,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 17:54:33,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 17:54:33,746 INFO L87 Difference]: Start difference. First operand 451 states and 461 transitions. Second operand 27 states. [2020-10-14 17:54:35,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:35,051 INFO L93 Difference]: Finished difference Result 873 states and 900 transitions. [2020-10-14 17:54:35,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 17:54:35,052 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 445 [2020-10-14 17:54:35,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:35,055 INFO L225 Difference]: With dead ends: 873 [2020-10-14 17:54:35,055 INFO L226 Difference]: Without dead ends: 478 [2020-10-14 17:54:35,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 17:54:35,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-10-14 17:54:35,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 469. [2020-10-14 17:54:35,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-10-14 17:54:35,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 479 transitions. [2020-10-14 17:54:35,067 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 479 transitions. Word has length 445 [2020-10-14 17:54:35,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:35,068 INFO L479 AbstractCegarLoop]: Abstraction has 469 states and 479 transitions. [2020-10-14 17:54:35,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 17:54:35,068 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 479 transitions. [2020-10-14 17:54:35,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-10-14 17:54:35,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:35,071 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 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] [2020-10-14 17:54:35,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 17:54:35,072 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:35,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:35,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1219602966, now seen corresponding path program 24 times [2020-10-14 17:54:35,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:35,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494631788] [2020-10-14 17:54:35,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:35,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:35,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:35,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:35,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:35,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:35,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:35,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:40,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:40,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 471 [2020-10-14 17:54:40,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:54:40,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5570 [2020-10-14 17:54:40,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:40,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:40,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 17:54:40,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-10-14 17:54:40,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 17:54:40,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:41,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:41,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:41,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:41,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:41,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:41,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:41,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:41,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:41,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:41,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:41,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:41,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:41,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 4608 trivial. 0 not checked. [2020-10-14 17:54:41,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494631788] [2020-10-14 17:54:41,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:41,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 17:54:41,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475080817] [2020-10-14 17:54:41,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 17:54:41,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:41,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 17:54:41,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 17:54:41,257 INFO L87 Difference]: Start difference. First operand 469 states and 479 transitions. Second operand 28 states. [2020-10-14 17:54:42,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:42,622 INFO L93 Difference]: Finished difference Result 907 states and 934 transitions. [2020-10-14 17:54:42,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 17:54:42,622 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 463 [2020-10-14 17:54:42,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:42,626 INFO L225 Difference]: With dead ends: 907 [2020-10-14 17:54:42,626 INFO L226 Difference]: Without dead ends: 496 [2020-10-14 17:54:42,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 17:54:42,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2020-10-14 17:54:42,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 487. [2020-10-14 17:54:42,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 487 states. [2020-10-14 17:54:42,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 497 transitions. [2020-10-14 17:54:42,639 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 497 transitions. Word has length 463 [2020-10-14 17:54:42,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:42,639 INFO L479 AbstractCegarLoop]: Abstraction has 487 states and 497 transitions. [2020-10-14 17:54:42,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 17:54:42,639 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 497 transitions. [2020-10-14 17:54:42,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-10-14 17:54:42,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:42,643 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 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] [2020-10-14 17:54:42,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 17:54:42,644 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:42,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:42,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1980181476, now seen corresponding path program 25 times [2020-10-14 17:54:42,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:42,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656752237] [2020-10-14 17:54:42,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:42,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:42,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:42,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:42,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:42,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:42,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:47,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:47,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 489 [2020-10-14 17:54:47,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:54:47,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5264 [2020-10-14 17:54:47,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:47,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:47,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 17:54:47,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-14 17:54:47,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 17:54:47,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:48,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:48,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:48,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:48,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:48,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:48,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:48,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:48,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:48,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:48,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:48,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:48,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:54:48,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 5000 trivial. 0 not checked. [2020-10-14 17:54:48,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656752237] [2020-10-14 17:54:48,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:48,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 17:54:48,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852609650] [2020-10-14 17:54:48,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 17:54:48,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:48,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 17:54:48,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:54:48,550 INFO L87 Difference]: Start difference. First operand 487 states and 497 transitions. Second operand 29 states. [2020-10-14 17:54:49,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:49,962 INFO L93 Difference]: Finished difference Result 941 states and 968 transitions. [2020-10-14 17:54:49,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 17:54:49,963 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 481 [2020-10-14 17:54:49,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:49,967 INFO L225 Difference]: With dead ends: 941 [2020-10-14 17:54:49,967 INFO L226 Difference]: Without dead ends: 514 [2020-10-14 17:54:49,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:54:49,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2020-10-14 17:54:49,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 505. [2020-10-14 17:54:49,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-10-14 17:54:49,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 515 transitions. [2020-10-14 17:54:49,980 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 515 transitions. Word has length 481 [2020-10-14 17:54:49,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:49,980 INFO L479 AbstractCegarLoop]: Abstraction has 505 states and 515 transitions. [2020-10-14 17:54:49,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 17:54:49,980 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 515 transitions. [2020-10-14 17:54:49,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-10-14 17:54:49,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:49,984 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 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] [2020-10-14 17:54:49,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 17:54:49,984 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:49,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:49,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1389991474, now seen corresponding path program 26 times [2020-10-14 17:54:49,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:49,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392123451] [2020-10-14 17:54:49,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:50,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:50,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:50,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:50,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:50,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:50,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:50,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:55,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:55,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 507 [2020-10-14 17:54:55,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:54:55,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5922 [2020-10-14 17:54:55,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:55,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:55,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 17:54:55,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-14 17:54:55,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 17:54:55,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:56,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:56,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:56,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:56,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:56,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:56,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:56,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:56,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:56,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:56,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:56,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:56,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 5408 trivial. 0 not checked. [2020-10-14 17:54:56,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392123451] [2020-10-14 17:54:56,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:56,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 17:54:56,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543444709] [2020-10-14 17:54:56,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 17:54:56,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:56,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 17:54:56,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:54:56,684 INFO L87 Difference]: Start difference. First operand 505 states and 515 transitions. Second operand 30 states. [2020-10-14 17:54:58,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:58,163 INFO L93 Difference]: Finished difference Result 975 states and 1002 transitions. [2020-10-14 17:54:58,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 17:54:58,164 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 499 [2020-10-14 17:54:58,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:58,167 INFO L225 Difference]: With dead ends: 975 [2020-10-14 17:54:58,167 INFO L226 Difference]: Without dead ends: 532 [2020-10-14 17:54:58,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:54:58,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2020-10-14 17:54:58,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 523. [2020-10-14 17:54:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 523 states. [2020-10-14 17:54:58,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 533 transitions. [2020-10-14 17:54:58,184 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 533 transitions. Word has length 499 [2020-10-14 17:54:58,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:58,185 INFO L479 AbstractCegarLoop]: Abstraction has 523 states and 533 transitions. [2020-10-14 17:54:58,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 17:54:58,185 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 533 transitions. [2020-10-14 17:54:58,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2020-10-14 17:54:58,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:58,189 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 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] [2020-10-14 17:54:58,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 17:54:58,189 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:58,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:58,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1314900224, now seen corresponding path program 27 times [2020-10-14 17:54:58,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:58,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234094224] [2020-10-14 17:54:58,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:58,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:58,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:58,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:58,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:58,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:58,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:03,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:03,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 525 [2020-10-14 17:55:03,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:55:03,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5547 [2020-10-14 17:55:03,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:03,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:03,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 17:55:03,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-14 17:55:03,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 17:55:03,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:04,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:04,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:04,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:04,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:04,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:04,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:55:04,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:04,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:04,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:04,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:04,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:04,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5832 trivial. 0 not checked. [2020-10-14 17:55:04,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234094224] [2020-10-14 17:55:04,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:04,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 17:55:04,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844648770] [2020-10-14 17:55:04,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 17:55:04,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:04,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 17:55:04,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 17:55:04,431 INFO L87 Difference]: Start difference. First operand 523 states and 533 transitions. Second operand 31 states. [2020-10-14 17:55:05,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:05,797 INFO L93 Difference]: Finished difference Result 1009 states and 1036 transitions. [2020-10-14 17:55:05,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 17:55:05,797 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 517 [2020-10-14 17:55:05,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:05,800 INFO L225 Difference]: With dead ends: 1009 [2020-10-14 17:55:05,800 INFO L226 Difference]: Without dead ends: 550 [2020-10-14 17:55:05,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 17:55:05,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2020-10-14 17:55:05,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 541. [2020-10-14 17:55:05,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 541 states. [2020-10-14 17:55:05,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 551 transitions. [2020-10-14 17:55:05,815 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 551 transitions. Word has length 517 [2020-10-14 17:55:05,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:05,816 INFO L479 AbstractCegarLoop]: Abstraction has 541 states and 551 transitions. [2020-10-14 17:55:05,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 17:55:05,816 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 551 transitions. [2020-10-14 17:55:05,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2020-10-14 17:55:05,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:05,820 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 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] [2020-10-14 17:55:05,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 17:55:05,821 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:05,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:05,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1071162446, now seen corresponding path program 28 times [2020-10-14 17:55:05,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:05,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810557911] [2020-10-14 17:55:05,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:05,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:05,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:05,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:06,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:06,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:06,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:11,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:11,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 543 [2020-10-14 17:55:11,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:55:11,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5189 [2020-10-14 17:55:11,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:11,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:11,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 17:55:11,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 245 [2020-10-14 17:55:11,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 17:55:11,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:11,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:11,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:11,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:11,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:11,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:11,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:55:11,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:11,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:11,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:11,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:11,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:11,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 6272 trivial. 0 not checked. [2020-10-14 17:55:11,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810557911] [2020-10-14 17:55:11,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:11,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 17:55:11,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156976301] [2020-10-14 17:55:11,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 17:55:11,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:11,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 17:55:11,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:55:11,792 INFO L87 Difference]: Start difference. First operand 541 states and 551 transitions. Second operand 32 states. [2020-10-14 17:55:13,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:13,428 INFO L93 Difference]: Finished difference Result 1043 states and 1070 transitions. [2020-10-14 17:55:13,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 17:55:13,429 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 535 [2020-10-14 17:55:13,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:13,433 INFO L225 Difference]: With dead ends: 1043 [2020-10-14 17:55:13,433 INFO L226 Difference]: Without dead ends: 568 [2020-10-14 17:55:13,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:55:13,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2020-10-14 17:55:13,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 559. [2020-10-14 17:55:13,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559 states. [2020-10-14 17:55:13,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 569 transitions. [2020-10-14 17:55:13,448 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 569 transitions. Word has length 535 [2020-10-14 17:55:13,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:13,448 INFO L479 AbstractCegarLoop]: Abstraction has 559 states and 569 transitions. [2020-10-14 17:55:13,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 17:55:13,449 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 569 transitions. [2020-10-14 17:55:13,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2020-10-14 17:55:13,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:13,453 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 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] [2020-10-14 17:55:13,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 17:55:13,454 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:13,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:13,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1955268636, now seen corresponding path program 29 times [2020-10-14 17:55:13,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:13,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486445668] [2020-10-14 17:55:13,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:13,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:13,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:13,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:13,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:13,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:14,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:19,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:19,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 561 [2020-10-14 17:55:19,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:55:19,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5556 [2020-10-14 17:55:19,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:19,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:19,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 17:55:19,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 133 [2020-10-14 17:55:19,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 17:55:19,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:19,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:19,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:19,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:19,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:19,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:19,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:55:19,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:19,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:19,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:19,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:19,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:19,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:19,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 6728 trivial. 0 not checked. [2020-10-14 17:55:19,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486445668] [2020-10-14 17:55:19,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:19,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 17:55:19,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827110114] [2020-10-14 17:55:19,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 17:55:19,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:19,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 17:55:19,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:55:19,832 INFO L87 Difference]: Start difference. First operand 559 states and 569 transitions. Second operand 33 states. [2020-10-14 17:55:21,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:21,573 INFO L93 Difference]: Finished difference Result 1077 states and 1104 transitions. [2020-10-14 17:55:21,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 17:55:21,573 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 553 [2020-10-14 17:55:21,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:21,577 INFO L225 Difference]: With dead ends: 1077 [2020-10-14 17:55:21,577 INFO L226 Difference]: Without dead ends: 586 [2020-10-14 17:55:21,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:55:21,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-10-14 17:55:21,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 577. [2020-10-14 17:55:21,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 577 states. [2020-10-14 17:55:21,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 587 transitions. [2020-10-14 17:55:21,589 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 587 transitions. Word has length 553 [2020-10-14 17:55:21,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:21,590 INFO L479 AbstractCegarLoop]: Abstraction has 577 states and 587 transitions. [2020-10-14 17:55:21,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 17:55:21,590 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 587 transitions. [2020-10-14 17:55:21,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2020-10-14 17:55:21,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:21,594 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 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] [2020-10-14 17:55:21,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 17:55:21,595 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:21,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:21,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1036375146, now seen corresponding path program 30 times [2020-10-14 17:55:21,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:21,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449812844] [2020-10-14 17:55:21,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:21,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:21,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:21,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:21,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:21,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:22,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:27,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:27,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 579 [2020-10-14 17:55:27,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:55:27,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6120 [2020-10-14 17:55:27,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:27,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:27,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 17:55:27,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 137 [2020-10-14 17:55:27,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 17:55:27,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:28,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:28,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:28,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:28,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:28,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:28,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:55:28,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:28,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:28,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:28,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:28,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:28,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 19 [2020-10-14 17:55:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 7200 trivial. 0 not checked. [2020-10-14 17:55:28,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449812844] [2020-10-14 17:55:28,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:28,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 17:55:28,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736293110] [2020-10-14 17:55:28,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 17:55:28,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:28,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 17:55:28,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 17:55:28,647 INFO L87 Difference]: Start difference. First operand 577 states and 587 transitions. Second operand 34 states. [2020-10-14 17:55:30,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:30,463 INFO L93 Difference]: Finished difference Result 1111 states and 1138 transitions. [2020-10-14 17:55:30,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 17:55:30,464 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 571 [2020-10-14 17:55:30,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:30,467 INFO L225 Difference]: With dead ends: 1111 [2020-10-14 17:55:30,467 INFO L226 Difference]: Without dead ends: 604 [2020-10-14 17:55:30,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 17:55:30,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2020-10-14 17:55:30,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 595. [2020-10-14 17:55:30,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2020-10-14 17:55:30,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 605 transitions. [2020-10-14 17:55:30,480 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 605 transitions. Word has length 571 [2020-10-14 17:55:30,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:30,481 INFO L479 AbstractCegarLoop]: Abstraction has 595 states and 605 transitions. [2020-10-14 17:55:30,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 17:55:30,481 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 605 transitions. [2020-10-14 17:55:30,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2020-10-14 17:55:30,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:30,486 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 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] [2020-10-14 17:55:30,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 17:55:30,486 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:30,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:30,487 INFO L82 PathProgramCache]: Analyzing trace with hash -18880200, now seen corresponding path program 31 times [2020-10-14 17:55:30,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:30,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466850455] [2020-10-14 17:55:30,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:30,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:30,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:30,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:30,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:30,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:30,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:37,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:37,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 597 [2020-10-14 17:55:37,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:55:37,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6891 [2020-10-14 17:55:37,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:37,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:37,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 17:55:37,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 141 [2020-10-14 17:55:37,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 17:55:37,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:38,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:38,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:38,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:38,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:38,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:38,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:55:38,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:38,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:38,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:38,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:38,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:38,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 7688 trivial. 0 not checked. [2020-10-14 17:55:38,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466850455] [2020-10-14 17:55:38,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:38,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 17:55:38,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317931478] [2020-10-14 17:55:38,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 17:55:38,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:38,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 17:55:38,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 17:55:38,324 INFO L87 Difference]: Start difference. First operand 595 states and 605 transitions. Second operand 35 states. [2020-10-14 17:55:40,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:40,077 INFO L93 Difference]: Finished difference Result 1145 states and 1172 transitions. [2020-10-14 17:55:40,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 17:55:40,078 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 589 [2020-10-14 17:55:40,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:40,080 INFO L225 Difference]: With dead ends: 1145 [2020-10-14 17:55:40,081 INFO L226 Difference]: Without dead ends: 622 [2020-10-14 17:55:40,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 17:55:40,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2020-10-14 17:55:40,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 613. [2020-10-14 17:55:40,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2020-10-14 17:55:40,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 623 transitions. [2020-10-14 17:55:40,094 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 623 transitions. Word has length 589 [2020-10-14 17:55:40,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:40,094 INFO L479 AbstractCegarLoop]: Abstraction has 613 states and 623 transitions. [2020-10-14 17:55:40,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 17:55:40,095 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 623 transitions. [2020-10-14 17:55:40,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2020-10-14 17:55:40,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:40,100 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 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] [2020-10-14 17:55:40,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 17:55:40,100 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:40,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:40,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1153948026, now seen corresponding path program 32 times [2020-10-14 17:55:40,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:40,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538995168] [2020-10-14 17:55:40,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:40,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:40,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:40,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:40,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:40,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:40,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:45,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:45,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 615 [2020-10-14 17:55:45,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:55:45,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5654 [2020-10-14 17:55:45,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:45,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:45,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 17:55:45,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:55:45,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 17:55:45,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:46,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:46,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:46,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:46,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:46,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:46,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:46,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:55:46,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:46,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:46,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:46,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:46,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:46,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 8192 trivial. 0 not checked. [2020-10-14 17:55:46,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538995168] [2020-10-14 17:55:46,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:46,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 17:55:46,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86637070] [2020-10-14 17:55:46,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 17:55:46,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:46,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 17:55:46,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:55:46,793 INFO L87 Difference]: Start difference. First operand 613 states and 623 transitions. Second operand 36 states. [2020-10-14 17:55:48,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:48,616 INFO L93 Difference]: Finished difference Result 1179 states and 1206 transitions. [2020-10-14 17:55:48,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 17:55:48,617 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 607 [2020-10-14 17:55:48,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:48,620 INFO L225 Difference]: With dead ends: 1179 [2020-10-14 17:55:48,620 INFO L226 Difference]: Without dead ends: 640 [2020-10-14 17:55:48,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:55:48,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2020-10-14 17:55:48,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 631. [2020-10-14 17:55:48,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2020-10-14 17:55:48,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 641 transitions. [2020-10-14 17:55:48,634 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 641 transitions. Word has length 607 [2020-10-14 17:55:48,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:48,635 INFO L479 AbstractCegarLoop]: Abstraction has 631 states and 641 transitions. [2020-10-14 17:55:48,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 17:55:48,635 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 641 transitions. [2020-10-14 17:55:48,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 626 [2020-10-14 17:55:48,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:48,640 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 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] [2020-10-14 17:55:48,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 17:55:48,641 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:48,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:48,641 INFO L82 PathProgramCache]: Analyzing trace with hash 607480916, now seen corresponding path program 33 times [2020-10-14 17:55:48,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:48,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679427601] [2020-10-14 17:55:48,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:48,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:48,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:48,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:48,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:49,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:49,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:54,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:54,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 633 [2020-10-14 17:55:54,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:55:54,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6022 [2020-10-14 17:55:54,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:54,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:54,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 17:55:54,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-14 17:55:54,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 17:55:54,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:55,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:55,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:55,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:55,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:55,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:55,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:55:55,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:55,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:55,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:55,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:55,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:55,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 8712 trivial. 0 not checked. [2020-10-14 17:55:55,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679427601] [2020-10-14 17:55:55,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:55,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 17:55:55,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932220737] [2020-10-14 17:55:55,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 17:55:55,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:55,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 17:55:55,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 17:55:55,713 INFO L87 Difference]: Start difference. First operand 631 states and 641 transitions. Second operand 37 states. [2020-10-14 17:55:57,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:57,821 INFO L93 Difference]: Finished difference Result 1213 states and 1240 transitions. [2020-10-14 17:55:57,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 17:55:57,822 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 625 [2020-10-14 17:55:57,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:57,827 INFO L225 Difference]: With dead ends: 1213 [2020-10-14 17:55:57,827 INFO L226 Difference]: Without dead ends: 658 [2020-10-14 17:55:57,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 17:55:57,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2020-10-14 17:55:57,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 649. [2020-10-14 17:55:57,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-10-14 17:55:57,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 659 transitions. [2020-10-14 17:55:57,841 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 659 transitions. Word has length 625 [2020-10-14 17:55:57,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:57,841 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 659 transitions. [2020-10-14 17:55:57,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 17:55:57,842 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 659 transitions. [2020-10-14 17:55:57,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2020-10-14 17:55:57,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:57,847 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 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] [2020-10-14 17:55:57,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 17:55:57,847 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:57,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:57,848 INFO L82 PathProgramCache]: Analyzing trace with hash 658938530, now seen corresponding path program 34 times [2020-10-14 17:55:57,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:57,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790926437] [2020-10-14 17:55:57,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:57,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:57,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:58,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:58,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:58,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:58,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:03,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:03,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 651 [2020-10-14 17:56:03,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:56:03,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5846 [2020-10-14 17:56:03,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:03,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:03,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 17:56:03,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 293 [2020-10-14 17:56:03,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 17:56:03,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0