/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:19:02,019 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:19:02,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:19:02,059 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:19:02,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:19:02,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:19:02,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:19:02,075 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:19:02,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:19:02,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:19:02,081 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:19:02,082 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:19:02,082 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:19:02,085 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:19:02,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:19:02,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:19:02,090 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:19:02,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:19:02,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:19:02,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:19:02,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:19:02,103 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:19:02,104 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:19:02,105 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:19:02,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:19:02,109 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:19:02,110 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:19:02,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:19:02,113 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:19:02,114 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:19:02,114 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:19:02,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:19:02,115 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:19:02,116 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:19:02,117 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:19:02,117 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:19:02,118 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:19:02,118 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:19:02,118 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:19:02,119 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:19:02,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:19:02,121 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 23:19:02,161 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:19:02,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:19:02,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:19:02,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:19:02,164 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:19:02,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:19:02,165 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:19:02,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:19:02,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:19:02,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:19:02,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:19:02,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:19:02,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:19:02,167 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:19:02,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:19:02,167 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:19:02,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:19:02,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:19:02,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:19:02,168 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:19:02,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:19:02,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:19:02,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:19:02,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:19:02,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:19:02,169 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:19:02,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:19:02,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:19:02,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:19:02,170 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:19:02,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:19:02,456 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:19:02,460 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:19:02,461 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:19:02,462 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:19:02,462 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const4.c [2020-10-13 23:19:02,520 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9672c9e90/43b222d8eb664ca882eab21849a373d7/FLAGb1a2cf3c1 [2020-10-13 23:19:02,961 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:19:02,961 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_const4.c [2020-10-13 23:19:02,968 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9672c9e90/43b222d8eb664ca882eab21849a373d7/FLAGb1a2cf3c1 [2020-10-13 23:19:03,356 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9672c9e90/43b222d8eb664ca882eab21849a373d7 [2020-10-13 23:19:03,366 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:19:03,368 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:19:03,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:19:03,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:19:03,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:19:03,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:19:03" (1/1) ... [2020-10-13 23:19:03,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a48f1ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:19:03, skipping insertion in model container [2020-10-13 23:19:03,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:19:03" (1/1) ... [2020-10-13 23:19:03,383 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:19:03,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:19:03,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:19:03,596 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:19:03,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:19:03,649 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:19:03,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:19:03 WrapperNode [2020-10-13 23:19:03,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:19:03,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:19:03,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:19:03,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:19:03,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:19:03" (1/1) ... [2020-10-13 23:19:03,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:19:03" (1/1) ... [2020-10-13 23:19:03,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:19:03" (1/1) ... [2020-10-13 23:19:03,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:19:03" (1/1) ... [2020-10-13 23:19:03,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:19:03" (1/1) ... [2020-10-13 23:19:03,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:19:03" (1/1) ... [2020-10-13 23:19:03,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:19:03" (1/1) ... [2020-10-13 23:19:03,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:19:03,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:19:03,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:19:03,785 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:19:03,786 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:19:03" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:19:03,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:19:03,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:19:03,846 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 23:19:03,846 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:19:03,846 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:19:03,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:19:03,847 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 23:19:03,847 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 23:19:03,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:19:03,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-13 23:19:03,847 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 23:19:03,847 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:19:03,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 23:19:03,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:19:03,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:19:03,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:19:03,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:19:03,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:19:04,152 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:19:04,153 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-13 23:19:04,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:19:04 BoogieIcfgContainer [2020-10-13 23:19:04,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:19:04,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:19:04,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:19:04,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:19:04,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:19:03" (1/3) ... [2020-10-13 23:19:04,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9544ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:19:04, skipping insertion in model container [2020-10-13 23:19:04,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:19:03" (2/3) ... [2020-10-13 23:19:04,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9544ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:19:04, skipping insertion in model container [2020-10-13 23:19:04,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:19:04" (3/3) ... [2020-10-13 23:19:04,166 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const4.c [2020-10-13 23:19:04,178 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:19:04,185 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:19:04,201 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:19:04,225 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:19:04,225 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:19:04,226 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:19:04,226 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:19:04,226 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:19:04,226 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:19:04,226 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:19:04,226 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:19:04,247 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-10-13 23:19:04,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 23:19:04,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:04,255 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] [2020-10-13 23:19:04,256 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:04,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:04,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1109148347, now seen corresponding path program 1 times [2020-10-13 23:19:04,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:04,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200620865] [2020-10-13 23:19:04,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:04,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:04,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:04,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:04,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:04,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:04,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:04,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:04,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:04,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:05,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:06,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:07,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:07,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 23:19:07,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:19:07,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3104 [2020-10-13 23:19:07,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:07,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:07,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:07,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 23:19:07,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:07,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 23:19:07,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:07,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:07,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:07,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:07,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:07,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:19:07,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:07,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:07,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:07,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:07,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:07,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:19:07,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200620865] [2020-10-13 23:19:07,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:19:07,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:19:07,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055225362] [2020-10-13 23:19:07,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:19:07,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:07,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:19:07,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:19:07,608 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2020-10-13 23:19:07,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:07,811 INFO L93 Difference]: Finished difference Result 81 states and 117 transitions. [2020-10-13 23:19:07,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:19:07,814 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-10-13 23:19:07,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:07,824 INFO L225 Difference]: With dead ends: 81 [2020-10-13 23:19:07,824 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 23:19:07,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:19:07,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 23:19:07,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-13 23:19:07,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 23:19:07,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-10-13 23:19:07,880 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 28 [2020-10-13 23:19:07,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:07,881 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-10-13 23:19:07,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:19:07,881 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-10-13 23:19:07,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 23:19:07,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:07,884 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] [2020-10-13 23:19:07,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:19:07,885 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:07,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:07,886 INFO L82 PathProgramCache]: Analyzing trace with hash -322584269, now seen corresponding path program 1 times [2020-10-13 23:19:07,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:07,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508582592] [2020-10-13 23:19:07,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:07,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:07,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:07,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:07,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:07,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:07,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:07,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:07,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:08,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:09,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:12,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:12,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 23:19:12,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:19:12,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:19:12,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:12,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:12,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:19:12,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:12,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:19:12,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:12,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:12,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:12,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:12,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:12,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:12,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:19:12,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:12,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:12,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:12,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:12,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:12,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:19:13,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508582592] [2020-10-13 23:19:13,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:19:13,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:19:13,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273312378] [2020-10-13 23:19:13,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:19:13,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:13,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:19:13,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:19:13,009 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 4 states. [2020-10-13 23:19:13,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:13,162 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2020-10-13 23:19:13,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:19:13,162 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-13 23:19:13,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:13,164 INFO L225 Difference]: With dead ends: 69 [2020-10-13 23:19:13,164 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 23:19:13,167 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 [2020-10-13 23:19:13,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 23:19:13,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-13 23:19:13,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 23:19:13,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-10-13 23:19:13,181 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 28 [2020-10-13 23:19:13,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:13,182 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-10-13 23:19:13,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:19:13,182 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-10-13 23:19:13,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 23:19:13,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:13,183 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] [2020-10-13 23:19:13,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:19:13,184 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:13,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:13,184 INFO L82 PathProgramCache]: Analyzing trace with hash 171629905, now seen corresponding path program 1 times [2020-10-13 23:19:13,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:13,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298512805] [2020-10-13 23:19:13,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:13,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:13,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:13,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:13,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:13,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:13,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:13,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:13,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:13,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:18,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:18,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 23:19:18,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:19:18,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:19:18,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:18,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:18,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:19:18,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:18,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:19:18,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:19:18,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:18,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:18,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:18,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:18,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:18,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:19:18,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:18,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:18,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:18,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:18,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:18,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:19:18,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298512805] [2020-10-13 23:19:18,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:19:18,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 23:19:18,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065542534] [2020-10-13 23:19:18,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:19:18,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:18,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:19:18,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:19:18,267 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 5 states. [2020-10-13 23:19:18,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:18,434 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2020-10-13 23:19:18,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:19:18,435 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-13 23:19:18,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:18,436 INFO L225 Difference]: With dead ends: 82 [2020-10-13 23:19:18,436 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 23:19:18,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:19:18,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 23:19:18,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2020-10-13 23:19:18,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 23:19:18,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-13 23:19:18,445 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 30 [2020-10-13 23:19:18,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:18,446 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-13 23:19:18,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:19:18,446 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-13 23:19:18,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 23:19:18,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:18,448 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] [2020-10-13 23:19:18,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:19:18,448 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:18,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:18,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1412380863, now seen corresponding path program 1 times [2020-10-13 23:19:18,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:18,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010647789] [2020-10-13 23:19:18,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:18,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:18,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:18,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:18,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:18,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:18,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:18,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:20,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:23,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:23,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 23:19:23,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:19:23,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:19:23,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:23,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:23,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:19:23,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:23,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:19:23,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:23,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:23,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:23,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:23,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:23,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:23,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:19:23,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:23,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:23,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:23,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:23,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:23,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 23:19:23,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010647789] [2020-10-13 23:19:23,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:23,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:19:23,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645504302] [2020-10-13 23:19:23,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:19:23,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:23,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:19:23,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:19:23,544 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 6 states. [2020-10-13 23:19:23,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:23,804 INFO L93 Difference]: Finished difference Result 102 states and 126 transitions. [2020-10-13 23:19:23,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:19:23,805 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-13 23:19:23,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:23,806 INFO L225 Difference]: With dead ends: 102 [2020-10-13 23:19:23,806 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 23:19:23,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:19:23,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 23:19:23,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-13 23:19:23,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 23:19:23,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2020-10-13 23:19:23,824 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 46 [2020-10-13 23:19:23,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:23,825 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2020-10-13 23:19:23,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:19:23,825 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2020-10-13 23:19:23,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 23:19:23,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:23,831 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] [2020-10-13 23:19:23,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:19:23,831 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:23,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:23,832 INFO L82 PathProgramCache]: Analyzing trace with hash -541579825, now seen corresponding path program 2 times [2020-10-13 23:19:23,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:23,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277122764] [2020-10-13 23:19:23,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:23,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:24,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:25,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:26,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:26,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:28,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:28,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:29,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:29,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 23:19:29,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:19:29,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5176 [2020-10-13 23:19:29,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:29,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:29,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 23:19:29,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:29,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 23:19:29,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:30,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:30,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:30,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:30,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:30,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:30,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:19:30,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:30,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:30,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:30,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:30,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:30,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:31,043 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:19:31,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277122764] [2020-10-13 23:19:31,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:31,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 23:19:31,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52020950] [2020-10-13 23:19:31,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 23:19:31,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:31,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 23:19:31,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:19:31,049 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 34 states. [2020-10-13 23:19:33,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:33,151 INFO L93 Difference]: Finished difference Result 124 states and 140 transitions. [2020-10-13 23:19:33,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:19:33,152 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 64 [2020-10-13 23:19:33,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:33,154 INFO L225 Difference]: With dead ends: 124 [2020-10-13 23:19:33,154 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 23:19:33,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=224, Invalid=1846, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 23:19:33,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 23:19:33,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 106. [2020-10-13 23:19:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 23:19:33,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 121 transitions. [2020-10-13 23:19:33,169 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 121 transitions. Word has length 64 [2020-10-13 23:19:33,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:33,170 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 121 transitions. [2020-10-13 23:19:33,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 23:19:33,170 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 121 transitions. [2020-10-13 23:19:33,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:19:33,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:33,171 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-13 23:19:33,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:19:33,172 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:33,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:33,172 INFO L82 PathProgramCache]: Analyzing trace with hash -2090829139, now seen corresponding path program 3 times [2020-10-13 23:19:33,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:33,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113499500] [2020-10-13 23:19:33,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:33,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:33,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:33,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:33,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:33,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:33,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:38,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:38,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 23:19:38,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:19:38,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:19:38,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:38,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:38,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:19:38,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 23:19:38,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:19:38,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:38,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:38,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:38,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:38,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:38,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:38,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:38,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:19:38,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:38,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:38,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:38,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:38,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:38,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 23:19:38,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113499500] [2020-10-13 23:19:38,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:38,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:19:38,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349437362] [2020-10-13 23:19:38,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:19:38,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:38,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:19:38,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:19:38,283 INFO L87 Difference]: Start difference. First operand 106 states and 121 transitions. Second operand 10 states. [2020-10-13 23:19:39,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:39,072 INFO L93 Difference]: Finished difference Result 213 states and 249 transitions. [2020-10-13 23:19:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:19:39,073 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-13 23:19:39,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:39,074 INFO L225 Difference]: With dead ends: 213 [2020-10-13 23:19:39,074 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 23:19:39,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:19:39,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 23:19:39,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 120. [2020-10-13 23:19:39,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 23:19:39,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 135 transitions. [2020-10-13 23:19:39,107 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 135 transitions. Word has length 66 [2020-10-13 23:19:39,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:39,109 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 135 transitions. [2020-10-13 23:19:39,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:19:39,109 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 135 transitions. [2020-10-13 23:19:39,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:19:39,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:39,113 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-13 23:19:39,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:19:39,114 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:39,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:39,114 INFO L82 PathProgramCache]: Analyzing trace with hash 246171885, now seen corresponding path program 4 times [2020-10-13 23:19:39,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:39,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041445043] [2020-10-13 23:19:39,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:39,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:39,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:39,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:39,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:39,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:39,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:39,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:44,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:44,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 23:19:44,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:19:44,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:19:44,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:44,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:44,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:19:44,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:44,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 23:19:44,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:44,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:44,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:44,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:44,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:44,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:44,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:19:44,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:44,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:44,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:44,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:44,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:44,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:44,248 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 23:19:44,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041445043] [2020-10-13 23:19:44,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:44,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:19:44,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723506355] [2020-10-13 23:19:44,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:19:44,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:44,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:19:44,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:19:44,251 INFO L87 Difference]: Start difference. First operand 120 states and 135 transitions. Second operand 10 states. [2020-10-13 23:19:44,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:44,651 INFO L93 Difference]: Finished difference Result 203 states and 226 transitions. [2020-10-13 23:19:44,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:19:44,652 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-13 23:19:44,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:44,654 INFO L225 Difference]: With dead ends: 203 [2020-10-13 23:19:44,654 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 23:19:44,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:19:44,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 23:19:44,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2020-10-13 23:19:44,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 23:19:44,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2020-10-13 23:19:44,672 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 66 [2020-10-13 23:19:44,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:44,673 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2020-10-13 23:19:44,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:19:44,673 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2020-10-13 23:19:44,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 23:19:44,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:44,678 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] [2020-10-13 23:19:44,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:19:44,679 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:44,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:44,679 INFO L82 PathProgramCache]: Analyzing trace with hash 79084765, now seen corresponding path program 5 times [2020-10-13 23:19:44,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:44,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900254215] [2020-10-13 23:19:44,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:44,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:45,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:47,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:48,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:49,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:49,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 23:19:49,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:19:49,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 23:19:49,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:49,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:49,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-13 23:19:49,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:49,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 23:19:49,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:51,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:51,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:51,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:51,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:51,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:51,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:19:51,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:51,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:51,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:51,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:51,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:51,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:19:51,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900254215] [2020-10-13 23:19:51,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:51,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:19:51,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701921748] [2020-10-13 23:19:51,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:19:51,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:51,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:19:51,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:19:51,447 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand 23 states. [2020-10-13 23:19:52,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:52,919 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2020-10-13 23:19:52,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:19:52,919 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 82 [2020-10-13 23:19:52,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:52,921 INFO L225 Difference]: With dead ends: 146 [2020-10-13 23:19:52,922 INFO L226 Difference]: Without dead ends: 141 [2020-10-13 23:19:52,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 6 SyntacticMatches, 28 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:19:52,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-13 23:19:52,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 136. [2020-10-13 23:19:52,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 23:19:52,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 151 transitions. [2020-10-13 23:19:52,944 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 151 transitions. Word has length 82 [2020-10-13 23:19:52,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:52,944 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 151 transitions. [2020-10-13 23:19:52,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:19:52,944 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 151 transitions. [2020-10-13 23:19:52,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 23:19:52,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:52,946 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-13 23:19:52,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:19:52,946 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:52,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:52,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1204828613, now seen corresponding path program 6 times [2020-10-13 23:19:52,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:52,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698802051] [2020-10-13 23:19:52,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:52,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:52,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:53,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:53,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:53,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:56,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:57,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:57,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 23:19:57,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:19:57,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:19:57,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:57,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:57,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:19:57,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:19:57,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:19:57,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:58,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:58,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:58,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:58,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:58,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:58,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:19:58,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:58,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:58,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:58,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:58,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:58,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-13 23:19:58,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698802051] [2020-10-13 23:19:58,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:58,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:19:58,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063663856] [2020-10-13 23:19:58,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:19:58,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:58,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:19:58,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:19:58,079 INFO L87 Difference]: Start difference. First operand 136 states and 151 transitions. Second operand 12 states. [2020-10-13 23:19:59,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:59,178 INFO L93 Difference]: Finished difference Result 271 states and 307 transitions. [2020-10-13 23:19:59,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:19:59,179 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 84 [2020-10-13 23:19:59,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:59,181 INFO L225 Difference]: With dead ends: 271 [2020-10-13 23:19:59,181 INFO L226 Difference]: Without dead ends: 165 [2020-10-13 23:19:59,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:19:59,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-13 23:19:59,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 150. [2020-10-13 23:19:59,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-13 23:19:59,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2020-10-13 23:19:59,196 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 84 [2020-10-13 23:19:59,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:59,196 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2020-10-13 23:19:59,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:19:59,196 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2020-10-13 23:19:59,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 23:19:59,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:59,197 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-13 23:19:59,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:19:59,198 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:59,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:59,198 INFO L82 PathProgramCache]: Analyzing trace with hash -295611269, now seen corresponding path program 7 times [2020-10-13 23:19:59,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:59,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220798153] [2020-10-13 23:19:59,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:59,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:59,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:59,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:59,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:59,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:59,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:04,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:04,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 23:20:04,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:20:04,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:20:04,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:04,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:04,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:20:04,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:04,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 23:20:04,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:04,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:04,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:04,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:04,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:04,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:04,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:20:04,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:04,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:04,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:04,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:04,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:04,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:20:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-13 23:20:04,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220798153] [2020-10-13 23:20:04,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:04,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:20:04,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503360598] [2020-10-13 23:20:04,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:20:04,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:04,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:20:04,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:20:04,342 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand 12 states. [2020-10-13 23:20:04,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:04,921 INFO L93 Difference]: Finished difference Result 251 states and 274 transitions. [2020-10-13 23:20:04,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:20:04,922 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 84 [2020-10-13 23:20:04,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:04,923 INFO L225 Difference]: With dead ends: 251 [2020-10-13 23:20:04,923 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 23:20:04,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:20:04,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 23:20:04,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2020-10-13 23:20:04,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 23:20:04,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2020-10-13 23:20:04,948 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 84 [2020-10-13 23:20:04,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:04,949 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2020-10-13 23:20:04,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:20:04,949 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2020-10-13 23:20:04,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 23:20:04,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:04,950 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] [2020-10-13 23:20:04,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:20:04,950 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:04,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:04,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1175415915, now seen corresponding path program 8 times [2020-10-13 23:20:04,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:04,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937297589] [2020-10-13 23:20:04,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:05,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:06,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:08,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:09,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:10,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:10,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 23:20:10,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:20:10,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5321 [2020-10-13 23:20:10,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:10,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:10,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-13 23:20:10,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:10,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-13 23:20:10,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:17,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:17,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:17,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:17,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:17,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:17,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:20:17,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:17,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:17,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:17,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:17,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:17,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:20:17,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937297589] [2020-10-13 23:20:17,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:17,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-13 23:20:17,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115061732] [2020-10-13 23:20:17,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-13 23:20:17,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:17,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-13 23:20:17,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=3790, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 23:20:17,355 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand 64 states. [2020-10-13 23:20:17,790 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-13 23:20:18,881 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-13 23:20:19,392 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-13 23:20:19,926 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-13 23:20:25,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:25,264 INFO L93 Difference]: Finished difference Result 286 states and 318 transitions. [2020-10-13 23:20:25,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-13 23:20:25,265 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 100 [2020-10-13 23:20:25,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:25,267 INFO L225 Difference]: With dead ends: 286 [2020-10-13 23:20:25,268 INFO L226 Difference]: Without dead ends: 280 [2020-10-13 23:20:25,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 12 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2025 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=481, Invalid=7351, Unknown=0, NotChecked=0, Total=7832 [2020-10-13 23:20:25,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-13 23:20:25,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 255. [2020-10-13 23:20:25,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-13 23:20:25,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 284 transitions. [2020-10-13 23:20:25,295 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 284 transitions. Word has length 100 [2020-10-13 23:20:25,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:25,296 INFO L479 AbstractCegarLoop]: Abstraction has 255 states and 284 transitions. [2020-10-13 23:20:25,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-13 23:20:25,296 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 284 transitions. [2020-10-13 23:20:25,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 23:20:25,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:25,297 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-13 23:20:25,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:20:25,298 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:25,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:25,298 INFO L82 PathProgramCache]: Analyzing trace with hash 526715465, now seen corresponding path program 9 times [2020-10-13 23:20:25,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:25,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035213478] [2020-10-13 23:20:25,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:25,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:25,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:25,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:25,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:25,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:30,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:30,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 23:20:30,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:20:30,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:20:30,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:30,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:30,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:20:30,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 23:20:30,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 23:20:30,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:30,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:30,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:30,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:30,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:30,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:30,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:30,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:20:30,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:30,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:30,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:30,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:30,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:30,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-13 23:20:30,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035213478] [2020-10-13 23:20:30,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:30,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:20:30,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119964621] [2020-10-13 23:20:30,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:20:30,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:30,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:20:30,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:20:30,462 INFO L87 Difference]: Start difference. First operand 255 states and 284 transitions. Second operand 14 states. [2020-10-13 23:20:31,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:31,826 INFO L93 Difference]: Finished difference Result 428 states and 481 transitions. [2020-10-13 23:20:31,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:20:31,826 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 102 [2020-10-13 23:20:31,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:31,830 INFO L225 Difference]: With dead ends: 428 [2020-10-13 23:20:31,830 INFO L226 Difference]: Without dead ends: 245 [2020-10-13 23:20:31,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:20:31,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-13 23:20:31,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 194. [2020-10-13 23:20:31,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-13 23:20:31,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 210 transitions. [2020-10-13 23:20:31,848 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 210 transitions. Word has length 102 [2020-10-13 23:20:31,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:31,849 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 210 transitions. [2020-10-13 23:20:31,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:20:31,849 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 210 transitions. [2020-10-13 23:20:31,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 23:20:31,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:31,850 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2020-10-13 23:20:31,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:20:31,851 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:31,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:31,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1169909095, now seen corresponding path program 10 times [2020-10-13 23:20:31,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:31,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559271455] [2020-10-13 23:20:31,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:31,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:31,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:31,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:31,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:31,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:32,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:36,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:36,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 23:20:36,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:20:36,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:20:36,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:36,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:36,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:20:36,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:36,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 23:20:36,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:36,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:36,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:36,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:36,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:36,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:36,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:20:36,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:36,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:36,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:36,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:36,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:36,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:37,007 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 23:20:37,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559271455] [2020-10-13 23:20:37,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:37,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:20:37,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033501546] [2020-10-13 23:20:37,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:20:37,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:37,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:20:37,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:20:37,009 INFO L87 Difference]: Start difference. First operand 194 states and 210 transitions. Second operand 14 states. [2020-10-13 23:20:37,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:37,737 INFO L93 Difference]: Finished difference Result 299 states and 322 transitions. [2020-10-13 23:20:37,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:20:37,738 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 104 [2020-10-13 23:20:37,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:37,739 INFO L225 Difference]: With dead ends: 299 [2020-10-13 23:20:37,739 INFO L226 Difference]: Without dead ends: 128 [2020-10-13 23:20:37,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:20:37,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-13 23:20:37,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 119. [2020-10-13 23:20:37,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-13 23:20:37,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2020-10-13 23:20:37,749 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 104 [2020-10-13 23:20:37,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:37,749 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2020-10-13 23:20:37,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:20:37,750 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2020-10-13 23:20:37,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-13 23:20:37,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:37,751 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] [2020-10-13 23:20:37,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:20:37,751 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:37,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:37,752 INFO L82 PathProgramCache]: Analyzing trace with hash -871558023, now seen corresponding path program 11 times [2020-10-13 23:20:37,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:37,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023496019] [2020-10-13 23:20:37,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:37,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:39,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:42,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:42,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-13 23:20:42,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:20:42,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:20:42,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:42,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:42,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 84 [2020-10-13 23:20:42,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:42,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-13 23:20:42,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:46,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:46,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:46,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:46,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:46,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:46,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:46,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:20:46,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:46,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:46,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:46,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:46,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:46,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 23:20:46,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023496019] [2020-10-13 23:20:46,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:46,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 23:20:46,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097157841] [2020-10-13 23:20:46,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 23:20:46,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:46,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 23:20:46,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1389, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:20:46,381 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand 39 states. [2020-10-13 23:20:49,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:49,019 INFO L93 Difference]: Finished difference Result 210 states and 225 transitions. [2020-10-13 23:20:49,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:20:49,020 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 118 [2020-10-13 23:20:49,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:49,022 INFO L225 Difference]: With dead ends: 210 [2020-10-13 23:20:49,022 INFO L226 Difference]: Without dead ends: 205 [2020-10-13 23:20:49,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 5 SyntacticMatches, 45 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=103, Invalid=1537, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:20:49,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-13 23:20:49,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 196. [2020-10-13 23:20:49,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-13 23:20:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 211 transitions. [2020-10-13 23:20:49,041 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 211 transitions. Word has length 118 [2020-10-13 23:20:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:49,041 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 211 transitions. [2020-10-13 23:20:49,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 23:20:49,042 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 211 transitions. [2020-10-13 23:20:49,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 23:20:49,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:49,043 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-10-13 23:20:49,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:20:49,043 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:49,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:49,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1779640023, now seen corresponding path program 12 times [2020-10-13 23:20:49,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:49,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369210051] [2020-10-13 23:20:49,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:49,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:49,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:49,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:49,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:49,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:54,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:54,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-13 23:20:54,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:20:54,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 23:20:54,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:54,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:54,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:20:54,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 23:20:54,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 23:20:54,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:54,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:54,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:54,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:54,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:54,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:54,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:20:54,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:54,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:54,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:54,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:54,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:54,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-13 23:20:54,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369210051] [2020-10-13 23:20:54,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:54,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:20:54,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146723252] [2020-10-13 23:20:54,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:20:54,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:54,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:20:54,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:20:54,299 INFO L87 Difference]: Start difference. First operand 196 states and 211 transitions. Second operand 16 states. [2020-10-13 23:20:56,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:56,110 INFO L93 Difference]: Finished difference Result 387 states and 423 transitions. [2020-10-13 23:20:56,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:20:56,111 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 120 [2020-10-13 23:20:56,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:56,113 INFO L225 Difference]: With dead ends: 387 [2020-10-13 23:20:56,113 INFO L226 Difference]: Without dead ends: 233 [2020-10-13 23:20:56,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:20:56,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-13 23:20:56,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 210. [2020-10-13 23:20:56,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-13 23:20:56,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 225 transitions. [2020-10-13 23:20:56,140 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 225 transitions. Word has length 120 [2020-10-13 23:20:56,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:56,140 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 225 transitions. [2020-10-13 23:20:56,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:20:56,140 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 225 transitions. [2020-10-13 23:20:56,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 23:20:56,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:56,142 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-10-13 23:20:56,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:20:56,142 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:56,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:56,143 INFO L82 PathProgramCache]: Analyzing trace with hash 964703511, now seen corresponding path program 13 times [2020-10-13 23:20:56,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:56,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747607715] [2020-10-13 23:20:56,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:56,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:56,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:56,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:56,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:56,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:57,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:01,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:01,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-13 23:21:01,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:21:01,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:21:01,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:01,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:01,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:21:01,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:21:01,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-13 23:21:01,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:01,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:21:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:01,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:01,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:01,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:21:01,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:21:01,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:21:01,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:01,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:01,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:21:01,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:21:01,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:21:01,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:01,335 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-13 23:21:01,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747607715] [2020-10-13 23:21:01,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:21:01,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:21:01,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128106425] [2020-10-13 23:21:01,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:21:01,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:21:01,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:21:01,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:21:01,337 INFO L87 Difference]: Start difference. First operand 210 states and 225 transitions. Second operand 16 states. [2020-10-13 23:21:02,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:21:02,328 INFO L93 Difference]: Finished difference Result 347 states and 370 transitions. [2020-10-13 23:21:02,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:21:02,329 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 120 [2020-10-13 23:21:02,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:21:02,331 INFO L225 Difference]: With dead ends: 347 [2020-10-13 23:21:02,331 INFO L226 Difference]: Without dead ends: 146 [2020-10-13 23:21:02,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:21:02,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-13 23:21:02,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 137. [2020-10-13 23:21:02,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-13 23:21:02,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 145 transitions. [2020-10-13 23:21:02,344 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 145 transitions. Word has length 120 [2020-10-13 23:21:02,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:21:02,345 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 145 transitions. [2020-10-13 23:21:02,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:21:02,345 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 145 transitions. [2020-10-13 23:21:02,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 23:21:02,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:21:02,347 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] [2020-10-13 23:21:02,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:21:02,347 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:21:02,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:21:02,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1979542265, now seen corresponding path program 14 times [2020-10-13 23:21:02,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:21:02,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024036067] [2020-10-13 23:21:02,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:21:02,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:02,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:05,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:08,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:08,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 23:21:08,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:21:08,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6282 [2020-10-13 23:21:08,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:08,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:08,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 104 [2020-10-13 23:21:08,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:21:08,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-13 23:21:08,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:12,236 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-10-13 23:21:12,458 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2020-10-13 23:21:12,929 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2020-10-13 23:21:13,443 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-10-13 23:21:13,733 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2020-10-13 23:21:26,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:21:26,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:26,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:26,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:26,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:21:26,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:21:26,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:21:26,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:26,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:26,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:21:26,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:21:26,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:21:26,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:26,276 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 27 proven. 261 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:21:26,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024036067] [2020-10-13 23:21:26,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:21:26,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2020-10-13 23:21:26,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836814615] [2020-10-13 23:21:26,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-10-13 23:21:26,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:21:26,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-10-13 23:21:26,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=9455, Unknown=0, NotChecked=0, Total=9900 [2020-10-13 23:21:26,280 INFO L87 Difference]: Start difference. First operand 137 states and 145 transitions. Second operand 100 states. [2020-10-13 23:21:27,634 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-13 23:21:27,989 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2020-10-13 23:21:29,405 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-13 23:21:31,593 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2020-10-13 23:21:33,614 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 52 [2020-10-13 23:21:33,956 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2020-10-13 23:21:34,513 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-13 23:21:34,898 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-13 23:21:35,407 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2020-10-13 23:21:36,686 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 93 [2020-10-13 23:21:37,233 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 93 [2020-10-13 23:21:37,601 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 84 [2020-10-13 23:21:38,452 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2020-10-13 23:21:40,565 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2020-10-13 23:21:41,717 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2020-10-13 23:21:42,064 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2020-10-13 23:21:42,920 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 87 [2020-10-13 23:21:43,377 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2020-10-13 23:21:43,788 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 64 [2020-10-13 23:21:44,305 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 56 [2020-10-13 23:21:44,785 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 37 [2020-10-13 23:21:45,344 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 65 [2020-10-13 23:21:45,903 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 35 [2020-10-13 23:21:46,863 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 60 [2020-10-13 23:21:47,812 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 44 [2020-10-13 23:21:48,575 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 79 [2020-10-13 23:21:50,402 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 59 [2020-10-13 23:21:51,836 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 90 [2020-10-13 23:21:52,999 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 90 [2020-10-13 23:21:54,177 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 80 [2020-10-13 23:21:55,090 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 51 [2020-10-13 23:21:56,388 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 87 [2020-10-13 23:21:57,257 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 80 [2020-10-13 23:21:58,027 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 76 [2020-10-13 23:21:58,875 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 80 [2020-10-13 23:21:59,524 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 61 [2020-10-13 23:22:00,318 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 65 [2020-10-13 23:22:01,030 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 70 [2020-10-13 23:22:02,029 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 51 [2020-10-13 23:22:02,656 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 32 [2020-10-13 23:22:04,159 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 89 [2020-10-13 23:22:04,933 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 36 [2020-10-13 23:22:06,445 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 81 [2020-10-13 23:22:07,270 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 33 [2020-10-13 23:22:08,373 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 83 [2020-10-13 23:22:09,194 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 34 [2020-10-13 23:22:10,667 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 28 [2020-10-13 23:22:11,641 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 48 [2020-10-13 23:22:12,357 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 40 [2020-10-13 23:22:13,205 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 52 [2020-10-13 23:22:13,937 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 25 [2020-10-13 23:22:15,034 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 51 [2020-10-13 23:22:15,724 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 24 [2020-10-13 23:22:16,888 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 50 [2020-10-13 23:22:17,808 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 53 [2020-10-13 23:22:18,710 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 41 [2020-10-13 23:22:19,600 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 51 [2020-10-13 23:22:20,420 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 42 [2020-10-13 23:22:21,021 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 56 [2020-10-13 23:22:21,764 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 29 [2020-10-13 23:22:22,702 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 36 [2020-10-13 23:22:24,154 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 57 [2020-10-13 23:22:25,304 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 57 [2020-10-13 23:22:26,502 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 71 [2020-10-13 23:22:28,576 WARN L193 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 86 [2020-10-13 23:22:29,826 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 54 [2020-10-13 23:22:31,986 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 37 [2020-10-13 23:22:48,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:48,959 INFO L93 Difference]: Finished difference Result 335 states and 364 transitions. [2020-10-13 23:22:48,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2020-10-13 23:22:48,963 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 136 [2020-10-13 23:22:48,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:48,965 INFO L225 Difference]: With dead ends: 335 [2020-10-13 23:22:48,965 INFO L226 Difference]: Without dead ends: 167 [2020-10-13 23:22:48,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 6 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10012 ImplicationChecksByTransitivity, 62.3s TimeCoverageRelationStatistics Valid=3087, Invalid=39555, Unknown=0, NotChecked=0, Total=42642 [2020-10-13 23:22:48,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-13 23:22:48,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 156. [2020-10-13 23:22:48,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-13 23:22:48,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 166 transitions. [2020-10-13 23:22:48,988 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 166 transitions. Word has length 136 [2020-10-13 23:22:48,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:48,988 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 166 transitions. [2020-10-13 23:22:48,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-10-13 23:22:48,988 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 166 transitions. [2020-10-13 23:22:48,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-13 23:22:48,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:48,989 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 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] [2020-10-13 23:22:48,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:22:48,990 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:48,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:48,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1918172133, now seen corresponding path program 15 times [2020-10-13 23:22:48,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:48,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410079881] [2020-10-13 23:22:48,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:49,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:49,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:49,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:49,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:49,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking...