/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-examples/standard_copy6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:30:36,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:30:36,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:30:36,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:30:36,995 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:30:36,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:30:36,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:30:37,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:30:37,001 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:30:37,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:30:37,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:30:37,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:30:37,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:30:37,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:30:37,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:30:37,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:30:37,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:30:37,009 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:30:37,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:30:37,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:30:37,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:30:37,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:30:37,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:30:37,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:30:37,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:30:37,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:30:37,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:30:37,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:30:37,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:30:37,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:30:37,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:30:37,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:30:37,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:30:37,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:30:37,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:30:37,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:30:37,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:30:37,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:30:37,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:30:37,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:30:37,038 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:30:37,042 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 23:30:37,085 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:30:37,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:30:37,086 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:30:37,086 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:30:37,087 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:30:37,087 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:30:37,087 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:30:37,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:30:37,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:30:37,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:30:37,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:30:37,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:30:37,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:30:37,089 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:30:37,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:30:37,089 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:30:37,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:30:37,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:30:37,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:30:37,090 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:30:37,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:30:37,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:30:37,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:30:37,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:30:37,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:30:37,092 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:30:37,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:30:37,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:30:37,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:30:37,093 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 23:30:37,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:30:37,413 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:30:37,416 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:30:37,418 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:30:37,418 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:30:37,419 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy6_ground-2.i [2020-10-13 23:30:37,485 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c0ad0537/52389fae05f84da49f1cabe8bf5d5bb3/FLAG11caf95ed [2020-10-13 23:30:37,921 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:30:37,921 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy6_ground-2.i [2020-10-13 23:30:37,928 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c0ad0537/52389fae05f84da49f1cabe8bf5d5bb3/FLAG11caf95ed [2020-10-13 23:30:38,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c0ad0537/52389fae05f84da49f1cabe8bf5d5bb3 [2020-10-13 23:30:38,285 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:30:38,287 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:30:38,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:30:38,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:30:38,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:30:38,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:30:38" (1/1) ... [2020-10-13 23:30:38,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34f77297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:38, skipping insertion in model container [2020-10-13 23:30:38,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:30:38" (1/1) ... [2020-10-13 23:30:38,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:30:38,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:30:38,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:30:38,508 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:30:38,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:30:38,557 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:30:38,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:38 WrapperNode [2020-10-13 23:30:38,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:30:38,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:30:38,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:30:38,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:30:38,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:38" (1/1) ... [2020-10-13 23:30:38,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:38" (1/1) ... [2020-10-13 23:30:38,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:38" (1/1) ... [2020-10-13 23:30:38,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:38" (1/1) ... [2020-10-13 23:30:38,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:38" (1/1) ... [2020-10-13 23:30:38,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:38" (1/1) ... [2020-10-13 23:30:38,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:38" (1/1) ... [2020-10-13 23:30:38,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:30:38,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:30:38,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:30:38,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:30:38,696 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:38" (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 23:30:38,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:30:38,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:30:38,755 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:30:38,755 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:30:38,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:30:38,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:30:38,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:30:38,756 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:30:38,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:30:38,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:30:38,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:30:38,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:30:38,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:30:38,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:30:39,124 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:30:39,125 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-13 23:30:39,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:30:39 BoogieIcfgContainer [2020-10-13 23:30:39,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:30:39,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:30:39,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:30:39,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:30:39,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:30:38" (1/3) ... [2020-10-13 23:30:39,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38b1274a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:30:39, skipping insertion in model container [2020-10-13 23:30:39,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:38" (2/3) ... [2020-10-13 23:30:39,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38b1274a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:30:39, skipping insertion in model container [2020-10-13 23:30:39,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:30:39" (3/3) ... [2020-10-13 23:30:39,140 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-2.i [2020-10-13 23:30:39,154 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:30:39,163 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:30:39,182 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:30:39,216 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:30:39,217 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:30:39,217 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:30:39,217 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:30:39,217 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:30:39,217 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:30:39,218 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:30:39,218 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:30:39,245 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-10-13 23:30:39,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 23:30:39,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:39,255 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] [2020-10-13 23:30:39,256 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:39,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:39,263 INFO L82 PathProgramCache]: Analyzing trace with hash 772526198, now seen corresponding path program 1 times [2020-10-13 23:30:39,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:39,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898505857] [2020-10-13 23:30:39,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:39,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:39,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:39,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:39,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:39,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:39,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:39,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:39,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:41,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:41,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 23:30:41,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:30:41,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1843 [2020-10-13 23:30:41,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:41,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:41,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:41,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:30:41,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:41,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:30:41,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:41,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:41,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:41,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:41,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:41,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:30:41,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:41,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:41,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:41,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:41,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:41,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:41,338 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 23:30:41,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898505857] [2020-10-13 23:30:41,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:30:41,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:30:41,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098920627] [2020-10-13 23:30:41,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:30:41,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:41,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:30:41,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:30:41,368 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2020-10-13 23:30:41,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:41,502 INFO L93 Difference]: Finished difference Result 76 states and 107 transitions. [2020-10-13 23:30:41,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:30:41,505 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-13 23:30:41,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:41,518 INFO L225 Difference]: With dead ends: 76 [2020-10-13 23:30:41,518 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 23:30:41,523 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 23:30:41,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 23:30:41,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-13 23:30:41,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 23:30:41,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-10-13 23:30:41,582 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 25 [2020-10-13 23:30:41,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:41,583 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-10-13 23:30:41,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:30:41,583 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-10-13 23:30:41,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 23:30:41,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:41,585 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] [2020-10-13 23:30:41,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:30:41,585 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:41,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:41,586 INFO L82 PathProgramCache]: Analyzing trace with hash 514335338, now seen corresponding path program 1 times [2020-10-13 23:30:41,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:41,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340040706] [2020-10-13 23:30:41,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:41,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:41,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:41,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:41,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:41,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:41,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:41,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:41,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:43,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:43,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 23:30:43,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:30:43,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2134 [2020-10-13 23:30:43,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:43,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:43,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:30:43,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 23:30:43,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:30:43,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:43,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:43,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:43,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:43,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:43,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:43,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:43,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:30:43,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:43,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:43,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:43,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:43,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:43,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:43,779 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 23:30:43,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340040706] [2020-10-13 23:30:43,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:30:43,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:30:43,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633116218] [2020-10-13 23:30:43,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:30:43,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:43,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:30:43,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:30:43,786 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 4 states. [2020-10-13 23:30:43,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:43,980 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2020-10-13 23:30:43,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:30:43,981 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-13 23:30:43,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:43,983 INFO L225 Difference]: With dead ends: 75 [2020-10-13 23:30:43,984 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 23:30:43,986 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 23:30:43,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 23:30:44,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-10-13 23:30:44,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 23:30:44,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-10-13 23:30:44,007 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 25 [2020-10-13 23:30:44,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:44,008 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-10-13 23:30:44,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:30:44,008 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-10-13 23:30:44,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:30:44,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:44,011 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] [2020-10-13 23:30:44,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:30:44,012 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:44,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:44,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1854451550, now seen corresponding path program 1 times [2020-10-13 23:30:44,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:44,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284255793] [2020-10-13 23:30:44,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:44,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:44,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:44,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:44,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:44,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:44,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:45,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:49,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:49,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 23:30:49,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:30:49,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:30:49,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:49,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:49,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:30:49,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:30:49,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:30:49,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:49,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:49,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:49,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:49,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:49,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:49,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:30:49,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:49,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:49,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:49,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:49,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:49,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:30:49,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284255793] [2020-10-13 23:30:49,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:30:49,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:30:49,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325742735] [2020-10-13 23:30:49,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:30:49,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:49,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:30:49,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:30:49,077 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 4 states. [2020-10-13 23:30:49,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:49,179 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2020-10-13 23:30:49,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:30:49,179 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-10-13 23:30:49,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:49,180 INFO L225 Difference]: With dead ends: 80 [2020-10-13 23:30:49,181 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 23:30:49,181 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 23:30:49,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 23:30:49,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-13 23:30:49,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 23:30:49,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-13 23:30:49,189 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 37 [2020-10-13 23:30:49,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:49,190 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-13 23:30:49,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:30:49,190 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-13 23:30:49,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 23:30:49,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:49,192 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] [2020-10-13 23:30:49,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:30:49,192 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:49,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:49,193 INFO L82 PathProgramCache]: Analyzing trace with hash 342802812, now seen corresponding path program 1 times [2020-10-13 23:30:49,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:49,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715202674] [2020-10-13 23:30:49,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:49,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:49,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:49,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:49,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:49,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:49,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:49,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:54,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:54,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:30:54,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:30:54,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:30:54,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:54,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:54,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:30:54,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 23:30:54,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:30:54,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:54,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:54,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:54,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:54,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:54,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:54,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:54,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:30:54,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:54,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:54,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:54,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:54,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:54,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:54,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:30:54,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715202674] [2020-10-13 23:30:54,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:54,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:30:54,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806604180] [2020-10-13 23:30:54,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:30:54,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:54,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:30:54,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:30:54,254 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 5 states. [2020-10-13 23:30:54,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:54,416 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2020-10-13 23:30:54,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:30:54,417 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-10-13 23:30:54,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:54,418 INFO L225 Difference]: With dead ends: 93 [2020-10-13 23:30:54,418 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 23:30:54,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:30:54,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 23:30:54,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-10-13 23:30:54,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 23:30:54,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-10-13 23:30:54,427 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 39 [2020-10-13 23:30:54,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:54,427 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-10-13 23:30:54,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:30:54,428 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-10-13 23:30:54,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 23:30:54,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:54,429 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 23:30:54,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:30:54,430 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:54,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:54,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1643113616, now seen corresponding path program 2 times [2020-10-13 23:30:54,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:54,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841169953] [2020-10-13 23:30:54,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:54,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:54,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:54,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:54,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:54,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:54,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:59,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:59,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 23:30:59,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:30:59,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:30:59,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:59,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:59,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:30:59,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 23:30:59,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:30:59,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:59,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:59,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:59,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:59,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:59,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:59,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:30:59,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:59,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:59,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:59,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:59,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:59,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-13 23:30:59,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841169953] [2020-10-13 23:30:59,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:59,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:30:59,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309177604] [2020-10-13 23:30:59,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:30:59,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:59,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:30:59,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:30:59,553 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 6 states. [2020-10-13 23:30:59,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:59,885 INFO L93 Difference]: Finished difference Result 115 states and 133 transitions. [2020-10-13 23:30:59,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:30:59,886 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-10-13 23:30:59,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:59,888 INFO L225 Difference]: With dead ends: 115 [2020-10-13 23:30:59,888 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 23:30:59,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:30:59,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 23:30:59,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2020-10-13 23:30:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 23:30:59,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2020-10-13 23:30:59,911 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 51 [2020-10-13 23:30:59,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:59,914 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2020-10-13 23:30:59,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:30:59,914 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2020-10-13 23:30:59,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 23:30:59,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:59,917 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 23:30:59,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:30:59,919 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:59,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:59,924 INFO L82 PathProgramCache]: Analyzing trace with hash 2026301284, now seen corresponding path program 3 times [2020-10-13 23:30:59,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:59,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058570823] [2020-10-13 23:30:59,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:59,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:59,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:59,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:00,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:00,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:02,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:04,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:04,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 23:31:04,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:04,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:31:04,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:04,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:04,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:31:04,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:04,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:31:04,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:31:05,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:05,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:05,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:05,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:05,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:05,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:05,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:05,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:05,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:05,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:05,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:05,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:05,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:31:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-10-13 23:31:05,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058570823] [2020-10-13 23:31:05,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:05,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:31:05,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410774855] [2020-10-13 23:31:05,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:31:05,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:05,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:31:05,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:31:05,033 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 5 states. [2020-10-13 23:31:05,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:05,181 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2020-10-13 23:31:05,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:31:05,182 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-13 23:31:05,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:05,184 INFO L225 Difference]: With dead ends: 130 [2020-10-13 23:31:05,184 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 23:31:05,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:31:05,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 23:31:05,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-13 23:31:05,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 23:31:05,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2020-10-13 23:31:05,207 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 63 [2020-10-13 23:31:05,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:05,208 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2020-10-13 23:31:05,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:31:05,208 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2020-10-13 23:31:05,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:31:05,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:05,213 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-13 23:31:05,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:31:05,213 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:05,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:05,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1440378882, now seen corresponding path program 4 times [2020-10-13 23:31:05,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:05,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978404931] [2020-10-13 23:31:05,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:05,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:05,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:05,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:05,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:05,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:08,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:10,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:10,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 23:31:10,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:10,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 23:31:10,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:10,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:10,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:31:10,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 23:31:10,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:31:10,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:10,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:10,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:10,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:10,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:10,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:10,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:10,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:10,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:10,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:10,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:10,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:10,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:10,321 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 23:31:10,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978404931] [2020-10-13 23:31:10,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:10,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:31:10,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769378995] [2020-10-13 23:31:10,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:31:10,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:10,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:31:10,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:31:10,325 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand 7 states. [2020-10-13 23:31:10,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:10,550 INFO L93 Difference]: Finished difference Result 139 states and 157 transitions. [2020-10-13 23:31:10,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:31:10,551 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-10-13 23:31:10,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:10,552 INFO L225 Difference]: With dead ends: 139 [2020-10-13 23:31:10,552 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 23:31:10,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:31:10,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 23:31:10,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2020-10-13 23:31:10,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 23:31:10,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2020-10-13 23:31:10,568 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 65 [2020-10-13 23:31:10,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:10,568 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2020-10-13 23:31:10,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:31:10,568 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2020-10-13 23:31:10,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 23:31:10,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:10,569 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-10-13 23:31:10,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:31:10,570 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:10,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:10,570 INFO L82 PathProgramCache]: Analyzing trace with hash -529938186, now seen corresponding path program 5 times [2020-10-13 23:31:10,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:10,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041490280] [2020-10-13 23:31:10,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:10,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:10,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:10,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:10,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:10,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:15,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:15,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:15,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 23:31:15,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:15,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:31:15,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:15,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:15,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:31:15,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:15,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:31:15,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:15,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:15,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:15,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:15,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:15,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:15,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:31:15,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:15,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:15,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:15,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:15,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:15,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-10-13 23:31:15,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041490280] [2020-10-13 23:31:15,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:15,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:31:15,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595748037] [2020-10-13 23:31:15,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:31:15,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:15,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:31:15,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:31:15,659 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand 6 states. [2020-10-13 23:31:15,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:15,755 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2020-10-13 23:31:15,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:31:15,755 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-10-13 23:31:15,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:15,756 INFO L225 Difference]: With dead ends: 156 [2020-10-13 23:31:15,757 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 23:31:15,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:31:15,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 23:31:15,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-13 23:31:15,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 23:31:15,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2020-10-13 23:31:15,765 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 77 [2020-10-13 23:31:15,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:15,765 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2020-10-13 23:31:15,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:31:15,765 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2020-10-13 23:31:15,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 23:31:15,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:15,766 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-10-13 23:31:15,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:31:15,767 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:15,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:15,767 INFO L82 PathProgramCache]: Analyzing trace with hash -434445036, now seen corresponding path program 6 times [2020-10-13 23:31:15,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:15,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838673345] [2020-10-13 23:31:15,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:15,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:15,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:15,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:15,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:15,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:15,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:19,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:20,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:20,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 23:31:20,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:20,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:31:20,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:20,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:20,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:31:20,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 23:31:20,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:31:20,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-13 23:31:20,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:20,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:20,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:20,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:20,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:20,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:20,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:20,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:20,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:20,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:20,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:20,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:20,866 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-10-13 23:31:20,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838673345] [2020-10-13 23:31:20,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:20,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:31:20,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686107848] [2020-10-13 23:31:20,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:31:20,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:20,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:31:20,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:31:20,869 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand 8 states. [2020-10-13 23:31:21,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:21,102 INFO L93 Difference]: Finished difference Result 163 states and 181 transitions. [2020-10-13 23:31:21,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:31:21,103 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-10-13 23:31:21,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:21,104 INFO L225 Difference]: With dead ends: 163 [2020-10-13 23:31:21,104 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 23:31:21,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:31:21,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 23:31:21,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2020-10-13 23:31:21,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 23:31:21,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2020-10-13 23:31:21,112 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 79 [2020-10-13 23:31:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:21,113 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2020-10-13 23:31:21,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:31:21,113 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2020-10-13 23:31:21,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 23:31:21,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:21,114 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2020-10-13 23:31:21,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:31:21,115 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:21,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:21,115 INFO L82 PathProgramCache]: Analyzing trace with hash -2017066232, now seen corresponding path program 7 times [2020-10-13 23:31:21,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:21,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797864705] [2020-10-13 23:31:21,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:21,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:21,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:21,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:21,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:21,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:26,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:26,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 23:31:26,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:31:26,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:31:26,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:26,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:26,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:31:26,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 23:31:26,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:31:26,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:26,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:26,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:26,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:26,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:26,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:26,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:26,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:31:26,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:26,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:26,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:26,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:26,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:26,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2020-10-13 23:31:26,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797864705] [2020-10-13 23:31:26,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:26,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:31:26,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811563371] [2020-10-13 23:31:26,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:31:26,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:26,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:31:26,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:31:26,229 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand 9 states. [2020-10-13 23:31:26,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:26,512 INFO L93 Difference]: Finished difference Result 185 states and 203 transitions. [2020-10-13 23:31:26,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:31:26,512 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-10-13 23:31:26,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:26,513 INFO L225 Difference]: With dead ends: 185 [2020-10-13 23:31:26,514 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 23:31:26,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:31:26,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 23:31:26,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2020-10-13 23:31:26,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 23:31:26,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 115 transitions. [2020-10-13 23:31:26,530 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 115 transitions. Word has length 91 [2020-10-13 23:31:26,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:26,530 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 115 transitions. [2020-10-13 23:31:26,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:31:26,531 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 115 transitions. [2020-10-13 23:31:26,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 23:31:26,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:26,532 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2020-10-13 23:31:26,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:31:26,532 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:26,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:26,533 INFO L82 PathProgramCache]: Analyzing trace with hash -123690244, now seen corresponding path program 8 times [2020-10-13 23:31:26,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:26,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872670305] [2020-10-13 23:31:26,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:26,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:26,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:26,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:26,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:26,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:31,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:31,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 23:31:31,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:31:31,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-13 23:31:31,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:31,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:31,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:31:31,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:31,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:31:31,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:31,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:31,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:31,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:31,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:31,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:31,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:31,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:31,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:31,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:31,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:31,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:31,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-10-13 23:31:31,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872670305] [2020-10-13 23:31:31,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:31,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:31:31,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421590276] [2020-10-13 23:31:31,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:31:31,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:31,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:31:31,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:31:31,689 INFO L87 Difference]: Start difference. First operand 108 states and 115 transitions. Second operand 7 states. [2020-10-13 23:31:31,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:31,803 INFO L93 Difference]: Finished difference Result 206 states and 220 transitions. [2020-10-13 23:31:31,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:31:31,804 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 103 [2020-10-13 23:31:31,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:31,805 INFO L225 Difference]: With dead ends: 206 [2020-10-13 23:31:31,805 INFO L226 Difference]: Without dead ends: 111 [2020-10-13 23:31:31,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:31:31,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-13 23:31:31,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-13 23:31:31,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 23:31:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 117 transitions. [2020-10-13 23:31:31,821 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 117 transitions. Word has length 103 [2020-10-13 23:31:31,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:31,821 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 117 transitions. [2020-10-13 23:31:31,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:31:31,822 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 117 transitions. [2020-10-13 23:31:31,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 23:31:31,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:31,824 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2020-10-13 23:31:31,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:31:31,824 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:31,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:31,825 INFO L82 PathProgramCache]: Analyzing trace with hash -395922022, now seen corresponding path program 9 times [2020-10-13 23:31:31,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:31,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541393478] [2020-10-13 23:31:31,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:31,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:31,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:31,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:31,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:31,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:32,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:36,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:36,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 23:31:36,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:31:36,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-13 23:31:36,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:36,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:36,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:31:36,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-13 23:31:36,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:31:36,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:36,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:36,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:36,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:36,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:36,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:36,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:36,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:36,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:36,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:36,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:36,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:36,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:36,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:36,966 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-13 23:31:36,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541393478] [2020-10-13 23:31:36,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:36,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:31:36,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644681274] [2020-10-13 23:31:36,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:31:36,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:36,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:31:36,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:31:36,969 INFO L87 Difference]: Start difference. First operand 110 states and 117 transitions. Second operand 10 states. [2020-10-13 23:31:37,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:37,273 INFO L93 Difference]: Finished difference Result 209 states and 227 transitions. [2020-10-13 23:31:37,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:31:37,274 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 105 [2020-10-13 23:31:37,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:37,276 INFO L225 Difference]: With dead ends: 209 [2020-10-13 23:31:37,276 INFO L226 Difference]: Without dead ends: 128 [2020-10-13 23:31:37,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:31:37,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-13 23:31:37,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 122. [2020-10-13 23:31:37,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 23:31:37,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 129 transitions. [2020-10-13 23:31:37,287 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 129 transitions. Word has length 105 [2020-10-13 23:31:37,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:37,288 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 129 transitions. [2020-10-13 23:31:37,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:31:37,288 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 129 transitions. [2020-10-13 23:31:37,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-13 23:31:37,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:37,292 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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] [2020-10-13 23:31:37,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:31:37,293 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:37,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:37,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1380656498, now seen corresponding path program 10 times [2020-10-13 23:31:37,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:37,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671288064] [2020-10-13 23:31:37,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:37,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:37,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:37,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:37,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:37,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:42,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:42,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-13 23:31:42,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:31:42,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:31:42,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:42,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:42,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:31:42,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:42,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:31:42,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:42,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:42,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:42,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:42,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:42,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:42,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:42,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:42,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:42,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:42,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:42,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:42,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2020-10-13 23:31:42,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671288064] [2020-10-13 23:31:42,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:42,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:31:42,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889751900] [2020-10-13 23:31:42,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:31:42,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:42,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:31:42,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:31:42,392 INFO L87 Difference]: Start difference. First operand 122 states and 129 transitions. Second operand 8 states. [2020-10-13 23:31:42,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:42,480 INFO L93 Difference]: Finished difference Result 232 states and 246 transitions. [2020-10-13 23:31:42,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:31:42,481 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 117 [2020-10-13 23:31:42,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:42,482 INFO L225 Difference]: With dead ends: 232 [2020-10-13 23:31:42,482 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 23:31:42,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:31:42,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 23:31:42,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-13 23:31:42,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 23:31:42,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 131 transitions. [2020-10-13 23:31:42,488 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 131 transitions. Word has length 117 [2020-10-13 23:31:42,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:42,488 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 131 transitions. [2020-10-13 23:31:42,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:31:42,488 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 131 transitions. [2020-10-13 23:31:42,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 23:31:42,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:42,490 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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] [2020-10-13 23:31:42,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:31:42,490 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:42,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:42,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1843331244, now seen corresponding path program 11 times [2020-10-13 23:31:42,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:42,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617638655] [2020-10-13 23:31:42,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:42,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:42,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:42,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:42,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:42,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:47,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:47,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 23:31:47,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:31:47,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:31:47,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:47,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:47,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:31:47,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 23:31:47,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:31:47,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:47,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:47,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:47,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:47,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:47,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:47,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:47,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:47,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:47,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:47,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:47,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:47,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:47,623 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2020-10-13 23:31:47,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617638655] [2020-10-13 23:31:47,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:47,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:31:47,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693482657] [2020-10-13 23:31:47,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:31:47,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:47,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:31:47,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:31:47,625 INFO L87 Difference]: Start difference. First operand 124 states and 131 transitions. Second operand 11 states. [2020-10-13 23:31:47,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:47,952 INFO L93 Difference]: Finished difference Result 233 states and 251 transitions. [2020-10-13 23:31:47,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:31:47,953 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 119 [2020-10-13 23:31:47,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:47,954 INFO L225 Difference]: With dead ends: 233 [2020-10-13 23:31:47,954 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 23:31:47,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:31:47,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 23:31:47,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2020-10-13 23:31:47,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 23:31:47,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 143 transitions. [2020-10-13 23:31:47,962 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 143 transitions. Word has length 119 [2020-10-13 23:31:47,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:47,963 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 143 transitions. [2020-10-13 23:31:47,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:31:47,963 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 143 transitions. [2020-10-13 23:31:47,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 23:31:47,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:47,964 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2020-10-13 23:31:47,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:31:47,964 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:47,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:47,964 INFO L82 PathProgramCache]: Analyzing trace with hash -6034784, now seen corresponding path program 12 times [2020-10-13 23:31:47,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:47,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053718499] [2020-10-13 23:31:47,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:47,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:48,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:48,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:48,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:48,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:52,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:52,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 23:31:52,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:31:52,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:31:52,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:52,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:52,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:31:52,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:52,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:31:52,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:53,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:53,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:53,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:53,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:53,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:53,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:53,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:53,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:53,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:53,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:53,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:53,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2020-10-13 23:31:53,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053718499] [2020-10-13 23:31:53,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:53,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:31:53,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042657289] [2020-10-13 23:31:53,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:31:53,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:53,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:31:53,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:31:53,071 INFO L87 Difference]: Start difference. First operand 136 states and 143 transitions. Second operand 9 states. [2020-10-13 23:31:53,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:53,196 INFO L93 Difference]: Finished difference Result 258 states and 272 transitions. [2020-10-13 23:31:53,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:31:53,196 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-10-13 23:31:53,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:53,198 INFO L225 Difference]: With dead ends: 258 [2020-10-13 23:31:53,198 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 23:31:53,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:31:53,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 23:31:53,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-10-13 23:31:53,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-13 23:31:53,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 145 transitions. [2020-10-13 23:31:53,204 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 145 transitions. Word has length 131 [2020-10-13 23:31:53,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:53,204 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 145 transitions. [2020-10-13 23:31:53,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:31:53,205 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 145 transitions. [2020-10-13 23:31:53,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-13 23:31:53,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:53,206 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2020-10-13 23:31:53,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:31:53,207 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:53,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:53,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1204421694, now seen corresponding path program 13 times [2020-10-13 23:31:53,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:53,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599093644] [2020-10-13 23:31:53,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:53,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:53,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:53,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:53,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:53,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:58,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:58,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-13 23:31:58,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:31:58,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 23:31:58,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:58,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:58,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:31:58,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-13 23:31:58,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:31:58,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:58,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:58,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:58,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:58,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:58,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:58,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:58,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:58,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:58,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:58,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:58,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:58,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:58,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:58,351 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2020-10-13 23:31:58,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599093644] [2020-10-13 23:31:58,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:58,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:31:58,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414158932] [2020-10-13 23:31:58,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:31:58,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:58,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:31:58,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:31:58,354 INFO L87 Difference]: Start difference. First operand 138 states and 145 transitions. Second operand 12 states. [2020-10-13 23:31:58,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:58,752 INFO L93 Difference]: Finished difference Result 257 states and 275 transitions. [2020-10-13 23:31:58,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:31:58,753 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 133 [2020-10-13 23:31:58,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:58,754 INFO L225 Difference]: With dead ends: 257 [2020-10-13 23:31:58,755 INFO L226 Difference]: Without dead ends: 156 [2020-10-13 23:31:58,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:31:58,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-13 23:31:58,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 150. [2020-10-13 23:31:58,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-13 23:31:58,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 157 transitions. [2020-10-13 23:31:58,772 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 157 transitions. Word has length 133 [2020-10-13 23:31:58,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:58,772 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 157 transitions. [2020-10-13 23:31:58,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:31:58,773 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 157 transitions. [2020-10-13 23:31:58,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-13 23:31:58,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:58,774 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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] [2020-10-13 23:31:58,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:31:58,775 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:58,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:58,775 INFO L82 PathProgramCache]: Analyzing trace with hash -883363022, now seen corresponding path program 14 times [2020-10-13 23:31:58,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:58,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809066381] [2020-10-13 23:31:58,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:58,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:58,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:58,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:58,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:59,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:03,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:03,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-13 23:32:03,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:03,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-13 23:32:03,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:03,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:03,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:32:03,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:32:03,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:32:03,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:03,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:03,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:03,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:03,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:03,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:03,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:03,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:03,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:03,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:03,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:03,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:03,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-13 23:32:03,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809066381] [2020-10-13 23:32:03,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:03,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:32:03,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501165796] [2020-10-13 23:32:03,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:32:03,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:03,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:32:03,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:32:03,963 INFO L87 Difference]: Start difference. First operand 150 states and 157 transitions. Second operand 13 states. [2020-10-13 23:32:04,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:04,349 INFO L93 Difference]: Finished difference Result 279 states and 297 transitions. [2020-10-13 23:32:04,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:32:04,349 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 145 [2020-10-13 23:32:04,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:04,351 INFO L225 Difference]: With dead ends: 279 [2020-10-13 23:32:04,351 INFO L226 Difference]: Without dead ends: 168 [2020-10-13 23:32:04,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:32:04,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-13 23:32:04,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 162. [2020-10-13 23:32:04,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-13 23:32:04,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 169 transitions. [2020-10-13 23:32:04,359 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 169 transitions. Word has length 145 [2020-10-13 23:32:04,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:04,360 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 169 transitions. [2020-10-13 23:32:04,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:32:04,360 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 169 transitions. [2020-10-13 23:32:04,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-13 23:32:04,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:04,362 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2020-10-13 23:32:04,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:32:04,362 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:04,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:04,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1752556582, now seen corresponding path program 15 times [2020-10-13 23:32:04,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:04,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397247042] [2020-10-13 23:32:04,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:04,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:04,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:04,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:04,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:05,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:09,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:09,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-13 23:32:09,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:09,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5092 [2020-10-13 23:32:09,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:09,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:09,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:32:09,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:09,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:32:09,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:09,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:09,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:09,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:09,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:09,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:09,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:09,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:09,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:09,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:09,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:09,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:09,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-13 23:32:09,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397247042] [2020-10-13 23:32:09,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:09,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:32:09,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499860061] [2020-10-13 23:32:09,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:32:09,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:09,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:32:09,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:32:09,555 INFO L87 Difference]: Start difference. First operand 162 states and 169 transitions. Second operand 10 states. [2020-10-13 23:32:09,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:09,656 INFO L93 Difference]: Finished difference Result 308 states and 322 transitions. [2020-10-13 23:32:09,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:32:09,656 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 157 [2020-10-13 23:32:09,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:09,658 INFO L225 Difference]: With dead ends: 308 [2020-10-13 23:32:09,658 INFO L226 Difference]: Without dead ends: 165 [2020-10-13 23:32:09,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:32:09,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-13 23:32:09,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2020-10-13 23:32:09,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-13 23:32:09,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 171 transitions. [2020-10-13 23:32:09,666 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 171 transitions. Word has length 157 [2020-10-13 23:32:09,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:09,666 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 171 transitions. [2020-10-13 23:32:09,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:32:09,667 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 171 transitions. [2020-10-13 23:32:09,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-13 23:32:09,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:09,668 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:09,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:32:09,669 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:09,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:09,669 INFO L82 PathProgramCache]: Analyzing trace with hash 2009535556, now seen corresponding path program 16 times [2020-10-13 23:32:09,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:09,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643240050] [2020-10-13 23:32:09,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:09,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:09,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:09,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:09,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:10,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:14,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:14,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-13 23:32:14,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:14,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:32:14,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:14,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:14,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:32:14,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-13 23:32:14,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:32:14,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:14,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:14,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:14,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:14,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:14,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:14,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:14,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:14,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:14,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:14,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:14,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:14,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2020-10-13 23:32:14,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643240050] [2020-10-13 23:32:14,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:14,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:32:14,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928048866] [2020-10-13 23:32:14,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:32:14,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:14,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:32:14,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:32:14,841 INFO L87 Difference]: Start difference. First operand 164 states and 171 transitions. Second operand 14 states. [2020-10-13 23:32:15,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:15,209 INFO L93 Difference]: Finished difference Result 303 states and 321 transitions. [2020-10-13 23:32:15,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:32:15,210 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 159 [2020-10-13 23:32:15,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:15,211 INFO L225 Difference]: With dead ends: 303 [2020-10-13 23:32:15,212 INFO L226 Difference]: Without dead ends: 182 [2020-10-13 23:32:15,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:32:15,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-13 23:32:15,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 176. [2020-10-13 23:32:15,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-13 23:32:15,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 183 transitions. [2020-10-13 23:32:15,220 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 183 transitions. Word has length 159 [2020-10-13 23:32:15,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:15,221 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 183 transitions. [2020-10-13 23:32:15,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:32:15,221 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 183 transitions. [2020-10-13 23:32:15,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-13 23:32:15,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:15,223 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:15,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:32:15,223 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:15,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:15,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1363817928, now seen corresponding path program 17 times [2020-10-13 23:32:15,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:15,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419002489] [2020-10-13 23:32:15,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:15,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:15,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:15,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:15,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:15,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:16,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:20,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:20,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 23:32:20,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:20,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:32:20,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:20,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:20,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:32:20,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:20,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:32:20,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:20,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:20,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:20,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:20,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:20,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:20,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:20,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:20,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:20,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:20,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:20,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:20,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:20,340 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2020-10-13 23:32:20,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419002489] [2020-10-13 23:32:20,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:20,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:32:20,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718542309] [2020-10-13 23:32:20,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:32:20,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:20,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:32:20,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:32:20,342 INFO L87 Difference]: Start difference. First operand 176 states and 183 transitions. Second operand 11 states. [2020-10-13 23:32:20,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:20,479 INFO L93 Difference]: Finished difference Result 334 states and 348 transitions. [2020-10-13 23:32:20,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:32:20,479 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 171 [2020-10-13 23:32:20,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:20,481 INFO L225 Difference]: With dead ends: 334 [2020-10-13 23:32:20,482 INFO L226 Difference]: Without dead ends: 179 [2020-10-13 23:32:20,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:32:20,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-13 23:32:20,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2020-10-13 23:32:20,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-13 23:32:20,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 185 transitions. [2020-10-13 23:32:20,490 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 185 transitions. Word has length 171 [2020-10-13 23:32:20,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:20,490 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 185 transitions. [2020-10-13 23:32:20,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:32:20,490 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 185 transitions. [2020-10-13 23:32:20,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-13 23:32:20,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:20,491 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:20,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:32:20,492 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:20,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:20,492 INFO L82 PathProgramCache]: Analyzing trace with hash -941003306, now seen corresponding path program 18 times [2020-10-13 23:32:20,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:20,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348474583] [2020-10-13 23:32:20,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:20,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:20,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:20,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:20,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:21,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:25,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:25,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-13 23:32:25,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:25,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-10-13 23:32:25,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:25,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:25,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:32:25,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 23:32:25,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:32:25,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:25,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:25,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:25,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:25,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:25,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:25,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:25,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:25,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:25,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:25,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:25,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:25,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:25,739 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 669 trivial. 0 not checked. [2020-10-13 23:32:25,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348474583] [2020-10-13 23:32:25,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:25,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:32:25,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221586071] [2020-10-13 23:32:25,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:32:25,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:25,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:32:25,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:32:25,741 INFO L87 Difference]: Start difference. First operand 178 states and 185 transitions. Second operand 15 states. [2020-10-13 23:32:26,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:26,222 INFO L93 Difference]: Finished difference Result 327 states and 345 transitions. [2020-10-13 23:32:26,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:32:26,223 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 173 [2020-10-13 23:32:26,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:26,224 INFO L225 Difference]: With dead ends: 327 [2020-10-13 23:32:26,224 INFO L226 Difference]: Without dead ends: 196 [2020-10-13 23:32:26,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:32:26,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-13 23:32:26,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 190. [2020-10-13 23:32:26,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-13 23:32:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 197 transitions. [2020-10-13 23:32:26,234 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 197 transitions. Word has length 173 [2020-10-13 23:32:26,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:26,234 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 197 transitions. [2020-10-13 23:32:26,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:32:26,234 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 197 transitions. [2020-10-13 23:32:26,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-13 23:32:26,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:26,236 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:26,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:32:26,236 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:26,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:26,237 INFO L82 PathProgramCache]: Analyzing trace with hash 2126325962, now seen corresponding path program 19 times [2020-10-13 23:32:26,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:26,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662317840] [2020-10-13 23:32:26,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:26,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:26,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:26,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:26,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:27,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:31,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:31,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-13 23:32:31,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:31,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-13 23:32:31,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:31,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:31,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:32:31,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 23:32:31,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:32:31,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:31,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:31,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:31,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:31,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:31,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:31,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:31,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:31,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:31,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:31,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:31,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:31,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-13 23:32:31,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662317840] [2020-10-13 23:32:31,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:31,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:32:31,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069657588] [2020-10-13 23:32:31,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:32:31,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:31,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:32:31,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:32:31,475 INFO L87 Difference]: Start difference. First operand 190 states and 197 transitions. Second operand 16 states. [2020-10-13 23:32:31,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:31,940 INFO L93 Difference]: Finished difference Result 349 states and 367 transitions. [2020-10-13 23:32:31,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:32:31,941 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 185 [2020-10-13 23:32:31,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:31,944 INFO L225 Difference]: With dead ends: 349 [2020-10-13 23:32:31,944 INFO L226 Difference]: Without dead ends: 208 [2020-10-13 23:32:31,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:32:31,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-13 23:32:31,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 202. [2020-10-13 23:32:31,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-13 23:32:31,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 209 transitions. [2020-10-13 23:32:31,953 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 209 transitions. Word has length 185 [2020-10-13 23:32:31,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:31,954 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 209 transitions. [2020-10-13 23:32:31,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:32:31,954 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 209 transitions. [2020-10-13 23:32:31,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-13 23:32:31,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:31,955 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:31,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:32:31,956 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:31,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:31,956 INFO L82 PathProgramCache]: Analyzing trace with hash -306649666, now seen corresponding path program 20 times [2020-10-13 23:32:31,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:31,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222125668] [2020-10-13 23:32:31,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:31,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:32,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:32,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:32,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:33,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:37,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:37,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-13 23:32:37,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:37,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5103 [2020-10-13 23:32:37,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:37,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:37,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:32:37,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:37,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:32:37,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:37,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:37,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:37,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:37,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:37,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:37,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:32:37,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:37,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:37,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:37,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:37,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:37,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1014 trivial. 0 not checked. [2020-10-13 23:32:37,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222125668] [2020-10-13 23:32:37,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:37,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:32:37,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544554972] [2020-10-13 23:32:37,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:32:37,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:37,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:32:37,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:32:37,186 INFO L87 Difference]: Start difference. First operand 202 states and 209 transitions. Second operand 12 states. [2020-10-13 23:32:37,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:37,318 INFO L93 Difference]: Finished difference Result 384 states and 398 transitions. [2020-10-13 23:32:37,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:32:37,319 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 197 [2020-10-13 23:32:37,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:37,321 INFO L225 Difference]: With dead ends: 384 [2020-10-13 23:32:37,321 INFO L226 Difference]: Without dead ends: 205 [2020-10-13 23:32:37,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:32:37,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-13 23:32:37,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2020-10-13 23:32:37,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-13 23:32:37,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 211 transitions. [2020-10-13 23:32:37,330 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 211 transitions. Word has length 197 [2020-10-13 23:32:37,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:37,331 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 211 transitions. [2020-10-13 23:32:37,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:32:37,331 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 211 transitions. [2020-10-13 23:32:37,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-13 23:32:37,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:37,332 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:37,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:32:37,333 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:37,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:37,333 INFO L82 PathProgramCache]: Analyzing trace with hash 450830300, now seen corresponding path program 21 times [2020-10-13 23:32:37,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:37,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011586944] [2020-10-13 23:32:37,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:37,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:37,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:37,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:37,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:37,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:40,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:42,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:42,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-13 23:32:42,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:42,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5184 [2020-10-13 23:32:42,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:42,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:42,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:32:42,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:32:42,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:32:42,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:42,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:42,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:42,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:42,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:42,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:42,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:42,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:42,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:42,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:42,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:42,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:42,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2020-10-13 23:32:42,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011586944] [2020-10-13 23:32:42,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:42,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:32:42,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705644927] [2020-10-13 23:32:42,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:32:42,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:42,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:32:42,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:32:42,734 INFO L87 Difference]: Start difference. First operand 204 states and 211 transitions. Second operand 17 states. [2020-10-13 23:32:43,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:43,258 INFO L93 Difference]: Finished difference Result 373 states and 391 transitions. [2020-10-13 23:32:43,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:32:43,259 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 199 [2020-10-13 23:32:43,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:43,261 INFO L225 Difference]: With dead ends: 373 [2020-10-13 23:32:43,261 INFO L226 Difference]: Without dead ends: 222 [2020-10-13 23:32:43,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:32:43,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-13 23:32:43,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 216. [2020-10-13 23:32:43,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-13 23:32:43,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 223 transitions. [2020-10-13 23:32:43,272 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 223 transitions. Word has length 199 [2020-10-13 23:32:43,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:43,273 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 223 transitions. [2020-10-13 23:32:43,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:32:43,273 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 223 transitions. [2020-10-13 23:32:43,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-13 23:32:43,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:43,274 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:43,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:32:43,278 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:43,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:43,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1225236944, now seen corresponding path program 22 times [2020-10-13 23:32:43,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:43,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908754138] [2020-10-13 23:32:43,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:43,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:43,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:43,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:43,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:47,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:48,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:48,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-13 23:32:48,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:48,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5211 [2020-10-13 23:32:48,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:48,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:48,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:32:48,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:48,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:32:48,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:48,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:48,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:48,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:48,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:48,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:48,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:48,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:48,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:48,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:48,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:48,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:48,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:48,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2020-10-13 23:32:48,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908754138] [2020-10-13 23:32:48,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:48,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:32:48,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627110471] [2020-10-13 23:32:48,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:32:48,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:48,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:32:48,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:32:48,643 INFO L87 Difference]: Start difference. First operand 216 states and 223 transitions. Second operand 13 states. [2020-10-13 23:32:48,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:48,765 INFO L93 Difference]: Finished difference Result 410 states and 424 transitions. [2020-10-13 23:32:48,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:32:48,766 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 211 [2020-10-13 23:32:48,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:48,767 INFO L225 Difference]: With dead ends: 410 [2020-10-13 23:32:48,767 INFO L226 Difference]: Without dead ends: 219 [2020-10-13 23:32:48,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:32:48,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-13 23:32:48,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2020-10-13 23:32:48,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-13 23:32:48,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 225 transitions. [2020-10-13 23:32:48,777 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 225 transitions. Word has length 211 [2020-10-13 23:32:48,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:48,777 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 225 transitions. [2020-10-13 23:32:48,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:32:48,777 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 225 transitions. [2020-10-13 23:32:48,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-13 23:32:48,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:48,779 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:48,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:32:48,779 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:48,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:48,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1183395986, now seen corresponding path program 23 times [2020-10-13 23:32:48,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:48,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33947122] [2020-10-13 23:32:48,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:48,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:48,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:48,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:48,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:48,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:48,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:53,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:53,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-13 23:32:53,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:53,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:32:53,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:53,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:53,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:32:53,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-13 23:32:53,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:32:53,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:54,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:54,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:54,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:54,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:54,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:54,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:54,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:54,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:54,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:54,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:54,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:54,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:54,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-10-13 23:32:54,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33947122] [2020-10-13 23:32:54,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:54,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:32:54,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949769350] [2020-10-13 23:32:54,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:32:54,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:54,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:32:54,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:32:54,031 INFO L87 Difference]: Start difference. First operand 218 states and 225 transitions. Second operand 18 states. [2020-10-13 23:32:54,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:54,510 INFO L93 Difference]: Finished difference Result 397 states and 415 transitions. [2020-10-13 23:32:54,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:32:54,511 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 213 [2020-10-13 23:32:54,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:54,513 INFO L225 Difference]: With dead ends: 397 [2020-10-13 23:32:54,513 INFO L226 Difference]: Without dead ends: 236 [2020-10-13 23:32:54,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:32:54,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-13 23:32:54,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 230. [2020-10-13 23:32:54,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-13 23:32:54,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 237 transitions. [2020-10-13 23:32:54,522 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 237 transitions. Word has length 213 [2020-10-13 23:32:54,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:54,522 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 237 transitions. [2020-10-13 23:32:54,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:32:54,522 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 237 transitions. [2020-10-13 23:32:54,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-13 23:32:54,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:54,524 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:54,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:32:54,524 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:54,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:54,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1302287970, now seen corresponding path program 24 times [2020-10-13 23:32:54,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:54,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338057862] [2020-10-13 23:32:54,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:54,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:54,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:54,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:54,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:57,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:59,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:59,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-13 23:32:59,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:59,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5112 [2020-10-13 23:32:59,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:59,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:59,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:32:59,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:59,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:32:59,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:59,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:59,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:59,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:59,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:59,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:59,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:59,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:59,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:59,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:59,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:59,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:59,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1450 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2020-10-13 23:32:59,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338057862] [2020-10-13 23:32:59,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:59,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:32:59,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761351493] [2020-10-13 23:32:59,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:32:59,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:59,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:32:59,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:32:59,804 INFO L87 Difference]: Start difference. First operand 230 states and 237 transitions. Second operand 14 states. [2020-10-13 23:32:59,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:59,953 INFO L93 Difference]: Finished difference Result 436 states and 450 transitions. [2020-10-13 23:32:59,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:32:59,954 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 225 [2020-10-13 23:32:59,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:59,956 INFO L225 Difference]: With dead ends: 436 [2020-10-13 23:32:59,956 INFO L226 Difference]: Without dead ends: 233 [2020-10-13 23:32:59,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:32:59,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-13 23:32:59,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2020-10-13 23:32:59,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-13 23:32:59,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 239 transitions. [2020-10-13 23:32:59,965 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 239 transitions. Word has length 225 [2020-10-13 23:32:59,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:59,966 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 239 transitions. [2020-10-13 23:32:59,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:32:59,966 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 239 transitions. [2020-10-13 23:32:59,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-13 23:32:59,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:59,967 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:59,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:32:59,968 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:59,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:59,968 INFO L82 PathProgramCache]: Analyzing trace with hash -689481856, now seen corresponding path program 25 times [2020-10-13 23:32:59,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:59,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761194551] [2020-10-13 23:32:59,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:59,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:00,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:00,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:00,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:03,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:05,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:05,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-13 23:33:05,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:05,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5131 [2020-10-13 23:33:05,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:05,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:05,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:33:05,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-10-13 23:33:05,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:33:05,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:05,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:05,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:05,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:05,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:05,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:05,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:05,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:05,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:05,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:05,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:05,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:05,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1246 trivial. 0 not checked. [2020-10-13 23:33:05,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761194551] [2020-10-13 23:33:05,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:05,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:33:05,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530107221] [2020-10-13 23:33:05,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:33:05,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:05,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:33:05,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:33:05,373 INFO L87 Difference]: Start difference. First operand 232 states and 239 transitions. Second operand 19 states. [2020-10-13 23:33:05,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:05,972 INFO L93 Difference]: Finished difference Result 421 states and 439 transitions. [2020-10-13 23:33:05,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:33:05,972 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 227 [2020-10-13 23:33:05,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:05,975 INFO L225 Difference]: With dead ends: 421 [2020-10-13 23:33:05,975 INFO L226 Difference]: Without dead ends: 250 [2020-10-13 23:33:05,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:33:05,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-13 23:33:05,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 244. [2020-10-13 23:33:05,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-13 23:33:05,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 251 transitions. [2020-10-13 23:33:05,984 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 251 transitions. Word has length 227 [2020-10-13 23:33:05,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:05,985 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 251 transitions. [2020-10-13 23:33:05,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:33:05,985 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 251 transitions. [2020-10-13 23:33:05,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-13 23:33:05,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:05,987 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:05,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:33:05,987 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:05,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:05,987 INFO L82 PathProgramCache]: Analyzing trace with hash -114089100, now seen corresponding path program 26 times [2020-10-13 23:33:05,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:05,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542779556] [2020-10-13 23:33:05,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:06,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:06,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:06,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:06,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:09,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:11,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:11,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-13 23:33:11,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:11,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5143 [2020-10-13 23:33:11,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:11,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:11,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:33:11,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-13 23:33:11,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:33:11,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:11,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:11,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:11,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:11,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:11,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:11,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:11,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:11,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:11,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:11,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:11,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:11,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1657 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2020-10-13 23:33:11,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542779556] [2020-10-13 23:33:11,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:11,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:33:11,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661488988] [2020-10-13 23:33:11,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:33:11,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:11,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:33:11,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:33:11,417 INFO L87 Difference]: Start difference. First operand 244 states and 251 transitions. Second operand 20 states. [2020-10-13 23:33:11,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:11,999 INFO L93 Difference]: Finished difference Result 443 states and 461 transitions. [2020-10-13 23:33:12,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:33:12,000 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 239 [2020-10-13 23:33:12,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:12,002 INFO L225 Difference]: With dead ends: 443 [2020-10-13 23:33:12,002 INFO L226 Difference]: Without dead ends: 262 [2020-10-13 23:33:12,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:33:12,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-13 23:33:12,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 256. [2020-10-13 23:33:12,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-13 23:33:12,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 263 transitions. [2020-10-13 23:33:12,012 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 263 transitions. Word has length 239 [2020-10-13 23:33:12,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:12,012 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 263 transitions. [2020-10-13 23:33:12,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:33:12,012 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 263 transitions. [2020-10-13 23:33:12,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-13 23:33:12,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:12,014 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:12,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:33:12,014 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:12,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:12,015 INFO L82 PathProgramCache]: Analyzing trace with hash -844795544, now seen corresponding path program 27 times [2020-10-13 23:33:12,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:12,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303998101] [2020-10-13 23:33:12,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:12,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:12,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:12,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:12,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:17,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:17,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-13 23:33:17,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:33:17,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-13 23:33:17,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:17,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:17,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:33:17,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:17,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:33:17,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:17,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:17,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:17,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:17,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:17,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:17,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:17,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:17,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:17,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:17,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:17,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:17,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:33:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1734 trivial. 0 not checked. [2020-10-13 23:33:17,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303998101] [2020-10-13 23:33:17,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:17,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:33:17,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105301673] [2020-10-13 23:33:17,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:33:17,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:17,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:33:17,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:33:17,360 INFO L87 Difference]: Start difference. First operand 256 states and 263 transitions. Second operand 15 states. [2020-10-13 23:33:17,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:17,577 INFO L93 Difference]: Finished difference Result 486 states and 500 transitions. [2020-10-13 23:33:17,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:33:17,578 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 251 [2020-10-13 23:33:17,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:17,580 INFO L225 Difference]: With dead ends: 486 [2020-10-13 23:33:17,580 INFO L226 Difference]: Without dead ends: 259 [2020-10-13 23:33:17,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:33:17,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-13 23:33:17,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2020-10-13 23:33:17,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-13 23:33:17,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 265 transitions. [2020-10-13 23:33:17,595 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 265 transitions. Word has length 251 [2020-10-13 23:33:17,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:17,596 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 265 transitions. [2020-10-13 23:33:17,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:33:17,596 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 265 transitions. [2020-10-13 23:33:17,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-13 23:33:17,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:17,599 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:17,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:33:17,600 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:17,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:17,600 INFO L82 PathProgramCache]: Analyzing trace with hash -713152250, now seen corresponding path program 28 times [2020-10-13 23:33:17,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:17,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637493409] [2020-10-13 23:33:17,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:17,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:17,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:17,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:17,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:22,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:22,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-13 23:33:22,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:33:22,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5124 [2020-10-13 23:33:22,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:22,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:22,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:33:22,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 23:33:22,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:33:22,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:23,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:23,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:23,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:23,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:23,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:23,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:23,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:23,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:23,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:23,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:23,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:23,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:33:23,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1878 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1589 trivial. 0 not checked. [2020-10-13 23:33:23,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637493409] [2020-10-13 23:33:23,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:23,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:33:23,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875200758] [2020-10-13 23:33:23,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:33:23,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:23,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:33:23,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:33:23,131 INFO L87 Difference]: Start difference. First operand 258 states and 265 transitions. Second operand 21 states. [2020-10-13 23:33:23,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:23,782 INFO L93 Difference]: Finished difference Result 467 states and 485 transitions. [2020-10-13 23:33:23,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:33:23,783 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 253 [2020-10-13 23:33:23,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:23,785 INFO L225 Difference]: With dead ends: 467 [2020-10-13 23:33:23,786 INFO L226 Difference]: Without dead ends: 276 [2020-10-13 23:33:23,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:33:23,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-13 23:33:23,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 270. [2020-10-13 23:33:23,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-13 23:33:23,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 277 transitions. [2020-10-13 23:33:23,796 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 277 transitions. Word has length 253 [2020-10-13 23:33:23,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:23,796 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 277 transitions. [2020-10-13 23:33:23,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:33:23,796 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 277 transitions. [2020-10-13 23:33:23,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-13 23:33:23,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:23,798 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:23,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:33:23,799 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:23,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:23,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1911849990, now seen corresponding path program 29 times [2020-10-13 23:33:23,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:23,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778697484] [2020-10-13 23:33:23,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:23,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:23,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:23,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:23,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:28,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:28,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:28,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-13 23:33:28,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:28,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-13 23:33:28,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:28,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:28,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:33:28,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:28,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:33:28,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:29,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:29,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:29,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:29,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:29,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:29,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:29,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:29,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:29,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:29,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:29,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:29,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:29,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1944 trivial. 0 not checked. [2020-10-13 23:33:29,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778697484] [2020-10-13 23:33:29,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:29,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:33:29,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571980538] [2020-10-13 23:33:29,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:33:29,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:29,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:33:29,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:33:29,074 INFO L87 Difference]: Start difference. First operand 270 states and 277 transitions. Second operand 16 states. [2020-10-13 23:33:29,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:29,233 INFO L93 Difference]: Finished difference Result 512 states and 526 transitions. [2020-10-13 23:33:29,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:33:29,233 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 265 [2020-10-13 23:33:29,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:29,235 INFO L225 Difference]: With dead ends: 512 [2020-10-13 23:33:29,236 INFO L226 Difference]: Without dead ends: 273 [2020-10-13 23:33:29,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:33:29,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-13 23:33:29,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 272. [2020-10-13 23:33:29,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-13 23:33:29,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 279 transitions. [2020-10-13 23:33:29,246 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 279 transitions. Word has length 265 [2020-10-13 23:33:29,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:29,246 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 279 transitions. [2020-10-13 23:33:29,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:33:29,247 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 279 transitions. [2020-10-13 23:33:29,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-13 23:33:29,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:29,249 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:29,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:33:29,249 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:29,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:29,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1245939480, now seen corresponding path program 30 times [2020-10-13 23:33:29,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:29,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665698312] [2020-10-13 23:33:29,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:29,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:29,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:29,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:29,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:34,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:34,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-13 23:33:34,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:33:34,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5162 [2020-10-13 23:33:34,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:34,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:34,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:33:34,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 23:33:34,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:33:34,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:34,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:34,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:34,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:34,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:34,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:34,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:34,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:34,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:34,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:34,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:34,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:34,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:34,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1789 trivial. 0 not checked. [2020-10-13 23:33:34,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665698312] [2020-10-13 23:33:34,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:34,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:33:34,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497944990] [2020-10-13 23:33:34,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:33:34,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:34,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:33:34,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:33:34,766 INFO L87 Difference]: Start difference. First operand 272 states and 279 transitions. Second operand 22 states. [2020-10-13 23:33:35,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:35,337 INFO L93 Difference]: Finished difference Result 491 states and 509 transitions. [2020-10-13 23:33:35,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:33:35,338 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 267 [2020-10-13 23:33:35,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:35,340 INFO L225 Difference]: With dead ends: 491 [2020-10-13 23:33:35,341 INFO L226 Difference]: Without dead ends: 290 [2020-10-13 23:33:35,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:33:35,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-13 23:33:35,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 284. [2020-10-13 23:33:35,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-13 23:33:35,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 291 transitions. [2020-10-13 23:33:35,349 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 291 transitions. Word has length 267 [2020-10-13 23:33:35,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:35,350 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 291 transitions. [2020-10-13 23:33:35,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:33:35,350 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 291 transitions. [2020-10-13 23:33:35,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-10-13 23:33:35,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:35,352 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:35,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:33:35,352 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:35,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:35,353 INFO L82 PathProgramCache]: Analyzing trace with hash 2144280332, now seen corresponding path program 31 times [2020-10-13 23:33:35,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:35,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105537904] [2020-10-13 23:33:35,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:35,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:35,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:35,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:35,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:35,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:40,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:40,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-13 23:33:40,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:40,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-13 23:33:40,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:40,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:40,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:33:40,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 119 [2020-10-13 23:33:40,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:33:40,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:40,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:40,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:40,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:40,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:40,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:40,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:40,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:40,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:40,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:40,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:40,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:40,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:40,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:40,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2335 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1974 trivial. 0 not checked. [2020-10-13 23:33:40,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105537904] [2020-10-13 23:33:40,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:40,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:33:40,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658815305] [2020-10-13 23:33:40,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:33:40,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:40,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:33:40,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:33:40,791 INFO L87 Difference]: Start difference. First operand 284 states and 291 transitions. Second operand 23 states. [2020-10-13 23:33:41,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:41,385 INFO L93 Difference]: Finished difference Result 513 states and 531 transitions. [2020-10-13 23:33:41,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:33:41,386 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 279 [2020-10-13 23:33:41,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:41,388 INFO L225 Difference]: With dead ends: 513 [2020-10-13 23:33:41,388 INFO L226 Difference]: Without dead ends: 302 [2020-10-13 23:33:41,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:33:41,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-10-13 23:33:41,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 296. [2020-10-13 23:33:41,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-13 23:33:41,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 303 transitions. [2020-10-13 23:33:41,397 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 303 transitions. Word has length 279 [2020-10-13 23:33:41,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:41,398 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 303 transitions. [2020-10-13 23:33:41,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:33:41,398 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 303 transitions. [2020-10-13 23:33:41,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-10-13 23:33:41,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:41,400 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:41,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:33:41,400 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:41,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:41,400 INFO L82 PathProgramCache]: Analyzing trace with hash -962905856, now seen corresponding path program 32 times [2020-10-13 23:33:41,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:41,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578252931] [2020-10-13 23:33:41,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:41,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:41,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:41,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:41,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:46,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:46,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 299 [2020-10-13 23:33:46,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:33:46,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-13 23:33:46,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:46,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:46,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:33:46,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:46,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:33:46,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:46,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:46,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:46,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:46,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:46,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:46,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:46,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:46,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:46,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:46,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:46,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:46,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:33:46,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2569 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2400 trivial. 0 not checked. [2020-10-13 23:33:46,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578252931] [2020-10-13 23:33:46,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:46,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:33:46,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717461716] [2020-10-13 23:33:46,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:33:46,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:46,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:33:46,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:33:46,729 INFO L87 Difference]: Start difference. First operand 296 states and 303 transitions. Second operand 17 states. [2020-10-13 23:33:46,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:46,881 INFO L93 Difference]: Finished difference Result 562 states and 576 transitions. [2020-10-13 23:33:46,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:33:46,882 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 291 [2020-10-13 23:33:46,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:46,883 INFO L225 Difference]: With dead ends: 562 [2020-10-13 23:33:46,883 INFO L226 Difference]: Without dead ends: 299 [2020-10-13 23:33:46,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:33:46,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-13 23:33:46,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 298. [2020-10-13 23:33:46,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-13 23:33:46,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 305 transitions. [2020-10-13 23:33:46,894 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 305 transitions. Word has length 291 [2020-10-13 23:33:46,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:46,895 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 305 transitions. [2020-10-13 23:33:46,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:33:46,895 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 305 transitions. [2020-10-13 23:33:46,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-13 23:33:46,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:46,897 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:46,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:33:46,898 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:46,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:46,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1611365022, now seen corresponding path program 33 times [2020-10-13 23:33:46,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:46,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012641301] [2020-10-13 23:33:46,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:46,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:47,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:47,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:47,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:47,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:52,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:52,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 301 [2020-10-13 23:33:52,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:52,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5227 [2020-10-13 23:33:52,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:52,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:52,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:33:52,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 125 [2020-10-13 23:33:52,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:33:52,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:52,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:52,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:52,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:52,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:52,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:52,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:52,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:52,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:52,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:52,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:52,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:52,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2196 trivial. 0 not checked. [2020-10-13 23:33:52,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012641301] [2020-10-13 23:33:52,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:52,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:33:52,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887593119] [2020-10-13 23:33:52,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:33:52,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:52,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:33:52,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:33:52,557 INFO L87 Difference]: Start difference. First operand 298 states and 305 transitions. Second operand 24 states. [2020-10-13 23:33:53,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:53,207 INFO L93 Difference]: Finished difference Result 537 states and 555 transitions. [2020-10-13 23:33:53,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:33:53,208 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 293 [2020-10-13 23:33:53,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:53,210 INFO L225 Difference]: With dead ends: 537 [2020-10-13 23:33:53,210 INFO L226 Difference]: Without dead ends: 316 [2020-10-13 23:33:53,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:33:53,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-13 23:33:53,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 310. [2020-10-13 23:33:53,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-13 23:33:53,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 317 transitions. [2020-10-13 23:33:53,219 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 317 transitions. Word has length 293 [2020-10-13 23:33:53,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:53,220 INFO L479 AbstractCegarLoop]: Abstraction has 310 states and 317 transitions. [2020-10-13 23:33:53,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:33:53,220 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 317 transitions. [2020-10-13 23:33:53,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-13 23:33:53,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:53,222 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:53,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:33:53,222 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:53,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:53,223 INFO L82 PathProgramCache]: Analyzing trace with hash -519202414, now seen corresponding path program 34 times [2020-10-13 23:33:53,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:53,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554133606] [2020-10-13 23:33:53,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:53,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:53,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:53,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:53,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:58,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:58,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-13 23:33:58,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:33:58,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-13 23:33:58,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:58,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:58,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:33:58,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:58,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:33:58,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:58,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:58,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:58,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:58,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:58,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:58,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:58,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:58,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:58,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:58,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:58,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:58,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2842 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2646 trivial. 0 not checked. [2020-10-13 23:33:58,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554133606] [2020-10-13 23:33:58,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:58,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:33:58,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875386997] [2020-10-13 23:33:58,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:33:58,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:58,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:33:58,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:33:58,532 INFO L87 Difference]: Start difference. First operand 310 states and 317 transitions. Second operand 18 states. [2020-10-13 23:33:58,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:58,711 INFO L93 Difference]: Finished difference Result 588 states and 602 transitions. [2020-10-13 23:33:58,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:33:58,712 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 305 [2020-10-13 23:33:58,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:58,714 INFO L225 Difference]: With dead ends: 588 [2020-10-13 23:33:58,714 INFO L226 Difference]: Without dead ends: 313 [2020-10-13 23:33:58,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:33:58,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-13 23:33:58,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 312. [2020-10-13 23:33:58,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-13 23:33:58,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 319 transitions. [2020-10-13 23:33:58,724 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 319 transitions. Word has length 305 [2020-10-13 23:33:58,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:58,725 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 319 transitions. [2020-10-13 23:33:58,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:33:58,725 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 319 transitions. [2020-10-13 23:33:58,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-13 23:33:58,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:58,727 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:58,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:33:58,728 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:58,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:58,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1642311344, now seen corresponding path program 35 times [2020-10-13 23:33:58,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:58,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361388815] [2020-10-13 23:33:58,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:58,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:58,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:58,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:58,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:04,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:04,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-13 23:34:04,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:04,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5309 [2020-10-13 23:34:04,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:04,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:04,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:34:04,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-10-13 23:34:04,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:34:04,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:04,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:04,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:04,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:04,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:04,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:04,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:04,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:04,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:04,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:04,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:04,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:04,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2871 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 2430 trivial. 0 not checked. [2020-10-13 23:34:04,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361388815] [2020-10-13 23:34:04,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:04,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:34:04,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701083806] [2020-10-13 23:34:04,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:34:04,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:04,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:34:04,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:34:04,514 INFO L87 Difference]: Start difference. First operand 312 states and 319 transitions. Second operand 25 states. [2020-10-13 23:34:05,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:05,243 INFO L93 Difference]: Finished difference Result 561 states and 579 transitions. [2020-10-13 23:34:05,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:34:05,244 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 307 [2020-10-13 23:34:05,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:05,247 INFO L225 Difference]: With dead ends: 561 [2020-10-13 23:34:05,247 INFO L226 Difference]: Without dead ends: 330 [2020-10-13 23:34:05,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:34:05,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-13 23:34:05,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 324. [2020-10-13 23:34:05,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-13 23:34:05,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 331 transitions. [2020-10-13 23:34:05,257 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 331 transitions. Word has length 307 [2020-10-13 23:34:05,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:05,257 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 331 transitions. [2020-10-13 23:34:05,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:34:05,258 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 331 transitions. [2020-10-13 23:34:05,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-13 23:34:05,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:05,260 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:05,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:34:05,260 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:05,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:05,261 INFO L82 PathProgramCache]: Analyzing trace with hash 650056356, now seen corresponding path program 36 times [2020-10-13 23:34:05,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:05,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534056752] [2020-10-13 23:34:05,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:05,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:05,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:05,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:05,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:10,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:10,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-13 23:34:10,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:10,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-13 23:34:10,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:10,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:10,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:34:10,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:10,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:34:10,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:10,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:10,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:10,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:10,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:10,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:10,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:10,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:10,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:10,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:10,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:10,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:10,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:10,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:10,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3129 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2904 trivial. 0 not checked. [2020-10-13 23:34:10,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534056752] [2020-10-13 23:34:10,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:10,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:34:10,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048652474] [2020-10-13 23:34:10,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:34:10,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:10,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:34:10,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:34:10,635 INFO L87 Difference]: Start difference. First operand 324 states and 331 transitions. Second operand 19 states. [2020-10-13 23:34:10,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:10,797 INFO L93 Difference]: Finished difference Result 614 states and 628 transitions. [2020-10-13 23:34:10,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:34:10,797 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 319 [2020-10-13 23:34:10,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:10,800 INFO L225 Difference]: With dead ends: 614 [2020-10-13 23:34:10,800 INFO L226 Difference]: Without dead ends: 327 [2020-10-13 23:34:10,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:34:10,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-13 23:34:10,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 326. [2020-10-13 23:34:10,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-10-13 23:34:10,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 333 transitions. [2020-10-13 23:34:10,808 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 333 transitions. Word has length 319 [2020-10-13 23:34:10,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:10,809 INFO L479 AbstractCegarLoop]: Abstraction has 326 states and 333 transitions. [2020-10-13 23:34:10,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:34:10,809 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 333 transitions. [2020-10-13 23:34:10,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-13 23:34:10,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:10,811 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:10,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:34:10,811 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:10,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:10,812 INFO L82 PathProgramCache]: Analyzing trace with hash 8575810, now seen corresponding path program 37 times [2020-10-13 23:34:10,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:10,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483965218] [2020-10-13 23:34:10,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:10,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:10,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:10,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:11,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:16,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:16,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-13 23:34:16,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:16,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5483 [2020-10-13 23:34:16,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:16,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:16,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:34:16,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 137 [2020-10-13 23:34:16,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:34:16,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:16,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:16,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:16,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:16,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:16,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:16,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:16,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:16,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:16,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:16,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:16,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:16,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2676 trivial. 0 not checked. [2020-10-13 23:34:16,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483965218] [2020-10-13 23:34:16,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:16,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:34:16,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283933971] [2020-10-13 23:34:16,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:34:16,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:16,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:34:16,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:34:16,778 INFO L87 Difference]: Start difference. First operand 326 states and 333 transitions. Second operand 26 states. [2020-10-13 23:34:17,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:17,496 INFO L93 Difference]: Finished difference Result 585 states and 603 transitions. [2020-10-13 23:34:17,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:34:17,497 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 321 [2020-10-13 23:34:17,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:17,500 INFO L225 Difference]: With dead ends: 585 [2020-10-13 23:34:17,500 INFO L226 Difference]: Without dead ends: 344 [2020-10-13 23:34:17,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:34:17,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-13 23:34:17,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 338. [2020-10-13 23:34:17,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-13 23:34:17,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 345 transitions. [2020-10-13 23:34:17,509 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 345 transitions. Word has length 321 [2020-10-13 23:34:17,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:17,510 INFO L479 AbstractCegarLoop]: Abstraction has 338 states and 345 transitions. [2020-10-13 23:34:17,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:34:17,510 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 345 transitions. [2020-10-13 23:34:17,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-13 23:34:17,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:17,512 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:17,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:34:17,512 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:17,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:17,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1747633206, now seen corresponding path program 38 times [2020-10-13 23:34:17,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:17,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577365756] [2020-10-13 23:34:17,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:17,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:17,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:17,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:17,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:22,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:22,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-10-13 23:34:22,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:22,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5081 [2020-10-13 23:34:22,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:22,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:22,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:34:22,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 141 [2020-10-13 23:34:22,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 23:34:22,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:23,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:23,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:23,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:23,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:23,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:23,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:23,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:23,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:23,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:23,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:23,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:23,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3430 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 2901 trivial. 0 not checked. [2020-10-13 23:34:23,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577365756] [2020-10-13 23:34:23,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:23,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:34:23,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168260874] [2020-10-13 23:34:23,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:34:23,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:23,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:34:23,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:34:23,105 INFO L87 Difference]: Start difference. First operand 338 states and 345 transitions. Second operand 27 states. [2020-10-13 23:34:23,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:23,972 INFO L93 Difference]: Finished difference Result 607 states and 625 transitions. [2020-10-13 23:34:23,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:34:23,973 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 333 [2020-10-13 23:34:23,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:23,975 INFO L225 Difference]: With dead ends: 607 [2020-10-13 23:34:23,975 INFO L226 Difference]: Without dead ends: 356 [2020-10-13 23:34:23,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:34:23,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-10-13 23:34:23,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 350. [2020-10-13 23:34:23,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-13 23:34:23,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 357 transitions. [2020-10-13 23:34:23,984 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 357 transitions. Word has length 333 [2020-10-13 23:34:23,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:23,984 INFO L479 AbstractCegarLoop]: Abstraction has 350 states and 357 transitions. [2020-10-13 23:34:23,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:34:23,985 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 357 transitions. [2020-10-13 23:34:23,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-10-13 23:34:23,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:23,987 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:23,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:34:23,988 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:23,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:23,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1924247338, now seen corresponding path program 39 times [2020-10-13 23:34:23,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:23,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862382065] [2020-10-13 23:34:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:24,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:24,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:24,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:24,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking...